diff mbox

[FFmpeg-devel,v4,3/7] lavf: add new API for iterating muxers and demuxers

Message ID 1517600658-32681-3-git-send-email-josh@itanimul.li
State New
Headers show

Commit Message

Josh Dekker Feb. 2, 2018, 7:44 p.m. UTC 
---
 Makefile                 |   3 +-
 configure                |   6 +-
 doc/APIchanges           |   7 +-
 libavformat/.gitignore   |   2 +
 libavformat/allformats.c | 866 ++++++++++++++++++++++++++++-------------------
 libavformat/avformat.h   |  31 ++
 libavformat/format.c     |  68 +---
 libavformat/version.h    |   3 +
 8 files changed, 566 insertions(+), 420 deletions(-)

Comments

Muhammad Faiz Feb. 6, 2018, 6:10 p.m. UTC | #1 
On Sat, Feb 3, 2018 at 2:44 AM, Josh de Kock <josh@itanimul.li> wrote:
> ---
>  Makefile                 |   3 +-
>  configure                |   6 +-
>  doc/APIchanges           |   7 +-
>  libavformat/.gitignore   |   2 +
>  libavformat/allformats.c | 866 ++++++++++++++++++++++++++++-------------------
>  libavformat/avformat.h   |  31 ++
>  libavformat/format.c     |  68 +---
>  libavformat/version.h    |   3 +
>  8 files changed, 566 insertions(+), 420 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 1d1c886..0cd0a1d 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -143,7 +143,8 @@ distclean:: clean
>                 ffbuild/.config ffbuild/config.* libavutil/avconfig.h \
>                 version.h libavutil/ffversion.h libavcodec/codec_names.h \
>                 libavcodec/bsf_list.c libavformat/protocol_list.c \
> -               libavcodec/codec_list.c libavcodec/parser_list.c
> +               libavcodec/codec_list.c libavcodec/parser_list.c \
> +               libavformat/muxer_list.c libavformat/demuxer_list.c
>  ifeq ($(SRC_LINK),src)
>         $(RM) src
>  endif
> diff --git a/configure b/configure
> index e8795d8..d6d7980 100755
> --- a/configure
> +++ b/configure
> @@ -3523,8 +3523,6 @@ find_things(){
>      sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
>  }
>
> -MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
> -DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
>  OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
>  INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
>  FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
> @@ -3536,6 +3534,8 @@ find_things_extern(){
>      sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
>  }
>
> +MUXER_LIST=$(find_things_extern muxer AVOutputFormat libavformat/allformats.c)
> +DEMUXER_LIST=$(find_things_extern demuxer AVInputFormat libavformat/allformats.c)
>  ENCODER_LIST=$(find_things_extern encoder AVCodec libavcodec/allcodecs.c)
>  DECODER_LIST=$(find_things_extern decoder AVCodec libavcodec/allcodecs.c)
>  CODEC_LIST="
> @@ -7034,6 +7034,8 @@ print_enabled_components(){
>  print_enabled_components libavcodec/codec_list.c AVCodec codec_list $CODEC_LIST
>  print_enabled_components libavcodec/parser_list.c AVCodecParser parser_list $PARSER_LIST
>  print_enabled_components libavcodec/bsf_list.c AVBitStreamFilter bitstream_filters $BSF_LIST
> +print_enabled_components libavformat/demuxer_list.c AVInputFormat demuxer_list $DEMUXER_LIST
> +print_enabled_components libavformat/muxer_list.c AVOutputFormat muxer_list $MUXER_LIST
>  print_enabled_components libavformat/protocol_list.c URLProtocol url_protocols $PROTOCOL_LIST
>
>  # Settings for pkg-config files
> diff --git a/doc/APIchanges b/doc/APIchanges
> index 77da22c..2a12f22 100644
> --- a/doc/APIchanges
> +++ b/doc/APIchanges
> @@ -15,7 +15,12 @@ libavutil:     2017-10-21
>
>  API changes, most recent first:
>
> -2018-01-xx - xxxxxxx - lavc 58.9.100 - avcodec.h
> +2018-xx-xx - xxxxxxx - lavf 58.9.100 - avformat.h
> +  Deprecate use of av_register_input_format(), av_register_output_format(),
> +  avformat_register_all(), av_iformat_next(), av_oformat_next().
> +  Add av_demuxer_iterate(), and av_muxer_iterate().
> +
> +2018-xx-xx - xxxxxxx - lavc 58.9.100 - avcodec.h
>    Deprecate use of avcodec_register(), avcodec_register_all(), and
>    av_codec_next(). Add av_codec_iterate().
>
> diff --git a/libavformat/.gitignore b/libavformat/.gitignore
> index cdc24b7..fb70c12 100644
> --- a/libavformat/.gitignore
> +++ b/libavformat/.gitignore
> @@ -1 +1,3 @@
>  /protocol_list.c
> +/muxer_list.c
> +/demuxer_list.c
> diff --git a/libavformat/allformats.c b/libavformat/allformats.c
> index 83ed766..0f198d5 100644
> --- a/libavformat/allformats.c
> +++ b/libavformat/allformats.c
> @@ -26,370 +26,528 @@
>  #include "url.h"
>  #include "version.h"
>
> -#define REGISTER_MUXER(X, x)                                            \
> -    {                                                                   \
> -        extern AVOutputFormat ff_##x##_muxer;                           \
> -        if (CONFIG_##X##_MUXER)                                         \
> -            av_register_output_format(&ff_##x##_muxer);                 \
> -    }
> +/* (de)muxers */
> +extern AVOutputFormat ff_a64_muxer;
> +extern AVInputFormat  ff_aa_demuxer;
> +extern AVInputFormat  ff_aac_demuxer;
> +extern AVInputFormat  ff_ac3_demuxer;
> +extern AVOutputFormat ff_ac3_muxer;
> +extern AVInputFormat  ff_acm_demuxer;
> +extern AVInputFormat  ff_act_demuxer;
> +extern AVInputFormat  ff_adf_demuxer;
> +extern AVInputFormat  ff_adp_demuxer;
> +extern AVInputFormat  ff_ads_demuxer;
> +extern AVOutputFormat ff_adts_muxer;
> +extern AVInputFormat  ff_adx_demuxer;
> +extern AVOutputFormat ff_adx_muxer;
> +extern AVInputFormat  ff_aea_demuxer;
> +extern AVInputFormat  ff_afc_demuxer;
> +extern AVInputFormat  ff_aiff_demuxer;
> +extern AVOutputFormat ff_aiff_muxer;
> +extern AVInputFormat  ff_aix_demuxer;
> +extern AVInputFormat  ff_amr_demuxer;
> +extern AVOutputFormat ff_amr_muxer;
> +extern AVInputFormat  ff_amrnb_demuxer;
> +extern AVInputFormat  ff_amrwb_demuxer;
> +extern AVInputFormat  ff_anm_demuxer;
> +extern AVInputFormat  ff_apc_demuxer;
> +extern AVInputFormat  ff_ape_demuxer;
> +extern AVInputFormat  ff_apng_demuxer;
> +extern AVOutputFormat ff_apng_muxer;
> +extern AVInputFormat  ff_aptx_demuxer;
> +extern AVOutputFormat ff_aptx_muxer;
> +extern AVInputFormat  ff_aqtitle_demuxer;
> +extern AVInputFormat  ff_asf_demuxer;
> +extern AVOutputFormat ff_asf_muxer;
> +extern AVInputFormat  ff_asf_o_demuxer;
> +extern AVInputFormat  ff_ass_demuxer;
> +extern AVOutputFormat ff_ass_muxer;
> +extern AVInputFormat  ff_ast_demuxer;
> +extern AVOutputFormat ff_ast_muxer;
> +extern AVOutputFormat ff_asf_stream_muxer;
> +extern AVInputFormat  ff_au_demuxer;
> +extern AVOutputFormat ff_au_muxer;
> +extern AVInputFormat  ff_avi_demuxer;
> +extern AVOutputFormat ff_avi_muxer;
> +extern AVInputFormat  ff_avisynth_demuxer;
> +extern AVOutputFormat ff_avm2_muxer;
> +extern AVInputFormat  ff_avr_demuxer;
> +extern AVInputFormat  ff_avs_demuxer;
> +extern AVInputFormat  ff_bethsoftvid_demuxer;
> +extern AVInputFormat  ff_bfi_demuxer;
> +extern AVInputFormat  ff_bintext_demuxer;
> +extern AVInputFormat  ff_bink_demuxer;
> +extern AVInputFormat  ff_bit_demuxer;
> +extern AVOutputFormat ff_bit_muxer;
> +extern AVInputFormat  ff_bmv_demuxer;
> +extern AVInputFormat  ff_bfstm_demuxer;
> +extern AVInputFormat  ff_brstm_demuxer;
> +extern AVInputFormat  ff_boa_demuxer;
> +extern AVInputFormat  ff_c93_demuxer;
> +extern AVInputFormat  ff_caf_demuxer;
> +extern AVOutputFormat ff_caf_muxer;
> +extern AVInputFormat  ff_cavsvideo_demuxer;
> +extern AVOutputFormat ff_cavsvideo_muxer;
> +extern AVInputFormat  ff_cdg_demuxer;
> +extern AVInputFormat  ff_cdxl_demuxer;
> +extern AVInputFormat  ff_cine_demuxer;
> +extern AVInputFormat  ff_concat_demuxer;
> +extern AVOutputFormat ff_crc_muxer;
> +extern AVInputFormat  ff_dash_demuxer;
> +extern AVOutputFormat ff_dash_muxer;
> +extern AVInputFormat  ff_data_demuxer;
> +extern AVOutputFormat ff_data_muxer;
> +extern AVInputFormat  ff_daud_demuxer;
> +extern AVOutputFormat ff_daud_muxer;
> +extern AVInputFormat  ff_dcstr_demuxer;
> +extern AVInputFormat  ff_dfa_demuxer;
> +extern AVInputFormat  ff_dirac_demuxer;
> +extern AVOutputFormat ff_dirac_muxer;
> +extern AVInputFormat  ff_dnxhd_demuxer;
> +extern AVOutputFormat ff_dnxhd_muxer;
> +extern AVInputFormat  ff_dsf_demuxer;
> +extern AVInputFormat  ff_dsicin_demuxer;
> +extern AVInputFormat  ff_dss_demuxer;
> +extern AVInputFormat  ff_dts_demuxer;
> +extern AVOutputFormat ff_dts_muxer;
> +extern AVInputFormat  ff_dtshd_demuxer;
> +extern AVInputFormat  ff_dv_demuxer;
> +extern AVOutputFormat ff_dv_muxer;
> +extern AVInputFormat  ff_dvbsub_demuxer;
> +extern AVInputFormat  ff_dvbtxt_demuxer;
> +extern AVInputFormat  ff_dxa_demuxer;
> +extern AVInputFormat  ff_ea_demuxer;
> +extern AVInputFormat  ff_ea_cdata_demuxer;
> +extern AVInputFormat  ff_eac3_demuxer;
> +extern AVOutputFormat ff_eac3_muxer;
> +extern AVInputFormat  ff_epaf_demuxer;
> +extern AVOutputFormat ff_f4v_muxer;
> +extern AVInputFormat  ff_ffmetadata_demuxer;
> +extern AVOutputFormat ff_ffmetadata_muxer;
> +extern AVOutputFormat ff_fifo_muxer;
> +extern AVInputFormat  ff_filmstrip_demuxer;
> +extern AVOutputFormat ff_filmstrip_muxer;
> +extern AVInputFormat  ff_fits_demuxer;
> +extern AVOutputFormat ff_fits_muxer;
> +extern AVInputFormat  ff_flac_demuxer;
> +extern AVOutputFormat ff_flac_muxer;
> +extern AVInputFormat  ff_flic_demuxer;
> +extern AVInputFormat  ff_flv_demuxer;
> +extern AVOutputFormat ff_flv_muxer;
> +extern AVInputFormat  ff_live_flv_demuxer;
> +extern AVInputFormat  ff_fourxm_demuxer;
> +extern AVOutputFormat ff_framecrc_muxer;
> +extern AVOutputFormat ff_framehash_muxer;
> +extern AVOutputFormat ff_framemd5_muxer;
> +extern AVInputFormat  ff_frm_demuxer;
> +extern AVInputFormat  ff_fsb_demuxer;
> +extern AVInputFormat  ff_g722_demuxer;
> +extern AVOutputFormat ff_g722_muxer;
> +extern AVInputFormat  ff_g723_1_demuxer;
> +extern AVOutputFormat ff_g723_1_muxer;
> +extern AVInputFormat  ff_g726_demuxer;
> +extern AVOutputFormat ff_g726_muxer;
> +extern AVInputFormat  ff_g726le_demuxer;
> +extern AVOutputFormat ff_g726le_muxer;
> +extern AVInputFormat  ff_g729_demuxer;
> +extern AVInputFormat  ff_gdv_demuxer;
> +extern AVInputFormat  ff_genh_demuxer;
> +extern AVInputFormat  ff_gif_demuxer;
> +extern AVOutputFormat ff_gif_muxer;
> +extern AVInputFormat  ff_gsm_demuxer;
> +extern AVOutputFormat ff_gsm_muxer;
> +extern AVInputFormat  ff_gxf_demuxer;
> +extern AVOutputFormat ff_gxf_muxer;
> +extern AVInputFormat  ff_h261_demuxer;
> +extern AVOutputFormat ff_h261_muxer;
> +extern AVInputFormat  ff_h263_demuxer;
> +extern AVOutputFormat ff_h263_muxer;
> +extern AVInputFormat  ff_h264_demuxer;
> +extern AVOutputFormat ff_h264_muxer;
> +extern AVOutputFormat ff_hash_muxer;
> +extern AVOutputFormat ff_hds_muxer;
> +extern AVInputFormat  ff_hevc_demuxer;
> +extern AVOutputFormat ff_hevc_muxer;
> +extern AVInputFormat  ff_hls_demuxer;
> +extern AVOutputFormat ff_hls_muxer;
> +extern AVInputFormat  ff_hnm_demuxer;
> +extern AVInputFormat  ff_ico_demuxer;
> +extern AVOutputFormat ff_ico_muxer;
> +extern AVInputFormat  ff_idcin_demuxer;
> +extern AVInputFormat  ff_idf_demuxer;
> +extern AVInputFormat  ff_iff_demuxer;
> +extern AVInputFormat  ff_ilbc_demuxer;
> +extern AVOutputFormat ff_ilbc_muxer;
> +extern AVInputFormat  ff_image2_demuxer;
> +extern AVOutputFormat ff_image2_muxer;
> +extern AVInputFormat  ff_image2pipe_demuxer;
> +extern AVOutputFormat ff_image2pipe_muxer;
> +extern AVInputFormat  ff_image2_alias_pix_demuxer;
> +extern AVInputFormat  ff_image2_brender_pix_demuxer;
> +extern AVInputFormat  ff_ingenient_demuxer;
> +extern AVInputFormat  ff_ipmovie_demuxer;
> +extern AVOutputFormat ff_ipod_muxer;
> +extern AVInputFormat  ff_ircam_demuxer;
> +extern AVOutputFormat ff_ircam_muxer;
> +extern AVOutputFormat ff_ismv_muxer;
> +extern AVInputFormat  ff_iss_demuxer;
> +extern AVInputFormat  ff_iv8_demuxer;
> +extern AVInputFormat  ff_ivf_demuxer;
> +extern AVOutputFormat ff_ivf_muxer;
> +extern AVInputFormat  ff_ivr_demuxer;
> +extern AVInputFormat  ff_jacosub_demuxer;
> +extern AVOutputFormat ff_jacosub_muxer;
> +extern AVInputFormat  ff_jv_demuxer;
> +extern AVOutputFormat ff_latm_muxer;
> +extern AVInputFormat  ff_lmlm4_demuxer;
> +extern AVInputFormat  ff_loas_demuxer;
> +extern AVInputFormat  ff_lrc_demuxer;
> +extern AVOutputFormat ff_lrc_muxer;
> +extern AVInputFormat  ff_lvf_demuxer;
> +extern AVInputFormat  ff_lxf_demuxer;
> +extern AVInputFormat  ff_m4v_demuxer;
> +extern AVOutputFormat ff_m4v_muxer;
> +extern AVOutputFormat ff_md5_muxer;
> +extern AVInputFormat  ff_matroska_demuxer;
> +extern AVOutputFormat ff_matroska_muxer;
> +extern AVOutputFormat ff_matroska_audio_muxer;
> +extern AVInputFormat  ff_mgsts_demuxer;
> +extern AVInputFormat  ff_microdvd_demuxer;
> +extern AVOutputFormat ff_microdvd_muxer;
> +extern AVInputFormat  ff_mjpeg_demuxer;
> +extern AVOutputFormat ff_mjpeg_muxer;
> +extern AVInputFormat  ff_mjpeg_2000_demuxer;
> +extern AVInputFormat  ff_mlp_demuxer;
> +extern AVOutputFormat ff_mlp_muxer;
> +extern AVInputFormat  ff_mlv_demuxer;
> +extern AVInputFormat  ff_mm_demuxer;
> +extern AVInputFormat  ff_mmf_demuxer;
> +extern AVOutputFormat ff_mmf_muxer;
> +extern AVInputFormat  ff_mov_demuxer;
> +extern AVOutputFormat ff_mov_muxer;
> +extern AVOutputFormat ff_mp2_muxer;
> +extern AVInputFormat  ff_mp3_demuxer;
> +extern AVOutputFormat ff_mp3_muxer;
> +extern AVOutputFormat ff_mp4_muxer;
> +extern AVInputFormat  ff_mpc_demuxer;
> +extern AVInputFormat  ff_mpc8_demuxer;
> +extern AVOutputFormat ff_mpeg1system_muxer;
> +extern AVOutputFormat ff_mpeg1vcd_muxer;
> +extern AVOutputFormat ff_mpeg1video_muxer;
> +extern AVOutputFormat ff_mpeg2dvd_muxer;
> +extern AVOutputFormat ff_mpeg2svcd_muxer;
> +extern AVOutputFormat ff_mpeg2video_muxer;
> +extern AVOutputFormat ff_mpeg2vob_muxer;
> +extern AVInputFormat  ff_mpegps_demuxer;
> +extern AVInputFormat  ff_mpegts_demuxer;
> +extern AVOutputFormat ff_mpegts_muxer;
> +extern AVInputFormat  ff_mpegtsraw_demuxer;
> +extern AVInputFormat  ff_mpegvideo_demuxer;
> +extern AVInputFormat  ff_mpjpeg_demuxer;
> +extern AVOutputFormat ff_mpjpeg_muxer;
> +extern AVInputFormat  ff_mpl2_demuxer;
> +extern AVInputFormat  ff_mpsub_demuxer;
> +extern AVInputFormat  ff_msf_demuxer;
> +extern AVInputFormat  ff_msnwc_tcp_demuxer;
> +extern AVInputFormat  ff_mtaf_demuxer;
> +extern AVInputFormat  ff_mtv_demuxer;
> +extern AVInputFormat  ff_musx_demuxer;
> +extern AVInputFormat  ff_mv_demuxer;
> +extern AVInputFormat  ff_mvi_demuxer;
> +extern AVInputFormat  ff_mxf_demuxer;
> +extern AVOutputFormat ff_mxf_muxer;
> +extern AVOutputFormat ff_mxf_d10_muxer;
> +extern AVOutputFormat ff_mxf_opatom_muxer;
> +extern AVInputFormat  ff_mxg_demuxer;
> +extern AVInputFormat  ff_nc_demuxer;
> +extern AVInputFormat  ff_nistsphere_demuxer;
> +extern AVInputFormat  ff_nsp_demuxer;
> +extern AVInputFormat  ff_nsv_demuxer;
> +extern AVOutputFormat ff_null_muxer;
> +extern AVInputFormat  ff_nut_demuxer;
> +extern AVOutputFormat ff_nut_muxer;
> +extern AVInputFormat  ff_nuv_demuxer;
> +extern AVOutputFormat ff_oga_muxer;
> +extern AVInputFormat  ff_ogg_demuxer;
> +extern AVOutputFormat ff_ogg_muxer;
> +extern AVOutputFormat ff_ogv_muxer;
> +extern AVInputFormat  ff_oma_demuxer;
> +extern AVOutputFormat ff_oma_muxer;
> +extern AVOutputFormat ff_opus_muxer;
> +extern AVInputFormat  ff_paf_demuxer;
> +extern AVInputFormat  ff_pcm_alaw_demuxer;
> +extern AVOutputFormat ff_pcm_alaw_muxer;
> +extern AVInputFormat  ff_pcm_mulaw_demuxer;
> +extern AVOutputFormat ff_pcm_mulaw_muxer;
> +extern AVInputFormat  ff_pcm_f64be_demuxer;
> +extern AVOutputFormat ff_pcm_f64be_muxer;
> +extern AVInputFormat  ff_pcm_f64le_demuxer;
> +extern AVOutputFormat ff_pcm_f64le_muxer;
> +extern AVInputFormat  ff_pcm_f32be_demuxer;
> +extern AVOutputFormat ff_pcm_f32be_muxer;
> +extern AVInputFormat  ff_pcm_f32le_demuxer;
> +extern AVOutputFormat ff_pcm_f32le_muxer;
> +extern AVInputFormat  ff_pcm_s32be_demuxer;
> +extern AVOutputFormat ff_pcm_s32be_muxer;
> +extern AVInputFormat  ff_pcm_s32le_demuxer;
> +extern AVOutputFormat ff_pcm_s32le_muxer;
> +extern AVInputFormat  ff_pcm_s24be_demuxer;
> +extern AVOutputFormat ff_pcm_s24be_muxer;
> +extern AVInputFormat  ff_pcm_s24le_demuxer;
> +extern AVOutputFormat ff_pcm_s24le_muxer;
> +extern AVInputFormat  ff_pcm_s16be_demuxer;
> +extern AVOutputFormat ff_pcm_s16be_muxer;
> +extern AVInputFormat  ff_pcm_s16le_demuxer;
> +extern AVOutputFormat ff_pcm_s16le_muxer;
> +extern AVInputFormat  ff_pcm_s8_demuxer;
> +extern AVOutputFormat ff_pcm_s8_muxer;
> +extern AVInputFormat  ff_pcm_u32be_demuxer;
> +extern AVOutputFormat ff_pcm_u32be_muxer;
> +extern AVInputFormat  ff_pcm_u32le_demuxer;
> +extern AVOutputFormat ff_pcm_u32le_muxer;
> +extern AVInputFormat  ff_pcm_u24be_demuxer;
> +extern AVOutputFormat ff_pcm_u24be_muxer;
> +extern AVInputFormat  ff_pcm_u24le_demuxer;
> +extern AVOutputFormat ff_pcm_u24le_muxer;
> +extern AVInputFormat  ff_pcm_u16be_demuxer;
> +extern AVOutputFormat ff_pcm_u16be_muxer;
> +extern AVInputFormat  ff_pcm_u16le_demuxer;
> +extern AVOutputFormat ff_pcm_u16le_muxer;
> +extern AVInputFormat  ff_pcm_u8_demuxer;
> +extern AVOutputFormat ff_pcm_u8_muxer;
> +extern AVInputFormat  ff_pjs_demuxer;
> +extern AVInputFormat  ff_pmp_demuxer;
> +extern AVOutputFormat ff_psp_muxer;
> +extern AVInputFormat  ff_pva_demuxer;
> +extern AVInputFormat  ff_pvf_demuxer;
> +extern AVInputFormat  ff_qcp_demuxer;
> +extern AVInputFormat  ff_r3d_demuxer;
> +extern AVInputFormat  ff_rawvideo_demuxer;
> +extern AVOutputFormat ff_rawvideo_muxer;
> +extern AVInputFormat  ff_realtext_demuxer;
> +extern AVInputFormat  ff_redspark_demuxer;
> +extern AVInputFormat  ff_rl2_demuxer;
> +extern AVInputFormat  ff_rm_demuxer;
> +extern AVOutputFormat ff_rm_muxer;
> +extern AVInputFormat  ff_roq_demuxer;
> +extern AVOutputFormat ff_roq_muxer;
> +extern AVInputFormat  ff_rpl_demuxer;
> +extern AVInputFormat  ff_rsd_demuxer;
> +extern AVInputFormat  ff_rso_demuxer;
> +extern AVOutputFormat ff_rso_muxer;
> +extern AVInputFormat  ff_rtp_demuxer;
> +extern AVOutputFormat ff_rtp_muxer;
> +extern AVOutputFormat ff_rtp_mpegts_muxer;
> +extern AVInputFormat  ff_rtsp_demuxer;
> +extern AVOutputFormat ff_rtsp_muxer;
> +extern AVInputFormat  ff_s337m_demuxer;
> +extern AVInputFormat  ff_sami_demuxer;
> +extern AVInputFormat  ff_sap_demuxer;
> +extern AVOutputFormat ff_sap_muxer;
> +extern AVInputFormat  ff_sbg_demuxer;
> +extern AVInputFormat  ff_scc_demuxer;
> +extern AVOutputFormat ff_scc_muxer;
> +extern AVInputFormat  ff_sdp_demuxer;
> +extern AVInputFormat  ff_sdr2_demuxer;
> +extern AVInputFormat  ff_sds_demuxer;
> +extern AVInputFormat  ff_sdx_demuxer;
> +extern AVInputFormat  ff_segafilm_demuxer;
> +extern AVOutputFormat ff_segment_muxer;
> +extern AVOutputFormat ff_stream_segment_muxer;
> +extern AVInputFormat  ff_shorten_demuxer;
> +extern AVInputFormat  ff_siff_demuxer;
> +extern AVOutputFormat ff_singlejpeg_muxer;
> +extern AVInputFormat  ff_sln_demuxer;
> +extern AVInputFormat  ff_smacker_demuxer;
> +extern AVInputFormat  ff_smjpeg_demuxer;
> +extern AVOutputFormat ff_smjpeg_muxer;
> +extern AVOutputFormat ff_smoothstreaming_muxer;
> +extern AVInputFormat  ff_smush_demuxer;
> +extern AVInputFormat  ff_sol_demuxer;
> +extern AVInputFormat  ff_sox_demuxer;
> +extern AVOutputFormat ff_sox_muxer;
> +extern AVOutputFormat ff_spx_muxer;
> +extern AVInputFormat  ff_spdif_demuxer;
> +extern AVOutputFormat ff_spdif_muxer;
> +extern AVInputFormat  ff_srt_demuxer;
> +extern AVOutputFormat ff_srt_muxer;
> +extern AVInputFormat  ff_str_demuxer;
> +extern AVInputFormat  ff_stl_demuxer;
> +extern AVInputFormat  ff_subviewer1_demuxer;
> +extern AVInputFormat  ff_subviewer_demuxer;
> +extern AVInputFormat  ff_sup_demuxer;
> +extern AVOutputFormat ff_sup_muxer;
> +extern AVInputFormat  ff_svag_demuxer;
> +extern AVInputFormat  ff_swf_demuxer;
> +extern AVOutputFormat ff_swf_muxer;
> +extern AVInputFormat  ff_tak_demuxer;
> +extern AVOutputFormat ff_tee_muxer;
> +extern AVInputFormat  ff_tedcaptions_demuxer;
> +extern AVOutputFormat ff_tg2_muxer;
> +extern AVOutputFormat ff_tgp_muxer;
> +extern AVInputFormat  ff_thp_demuxer;
> +extern AVInputFormat  ff_threedostr_demuxer;
> +extern AVInputFormat  ff_tiertexseq_demuxer;
> +extern AVOutputFormat ff_mkvtimestamp_v2_muxer;
> +extern AVInputFormat  ff_tmv_demuxer;
> +extern AVInputFormat  ff_truehd_demuxer;
> +extern AVOutputFormat ff_truehd_muxer;
> +extern AVInputFormat  ff_tta_demuxer;
> +extern AVOutputFormat ff_tta_muxer;
> +extern AVInputFormat  ff_txd_demuxer;
> +extern AVInputFormat  ff_tty_demuxer;
> +extern AVInputFormat  ff_ty_demuxer;
> +extern AVOutputFormat ff_uncodedframecrc_muxer;
> +extern AVInputFormat  ff_v210_demuxer;
> +extern AVInputFormat  ff_v210x_demuxer;
> +extern AVInputFormat  ff_vag_demuxer;
> +extern AVInputFormat  ff_vc1_demuxer;
> +extern AVOutputFormat ff_vc1_muxer;
> +extern AVInputFormat  ff_vc1t_demuxer;
> +extern AVOutputFormat ff_vc1t_muxer;
> +extern AVInputFormat  ff_vivo_demuxer;
> +extern AVInputFormat  ff_vmd_demuxer;
> +extern AVInputFormat  ff_vobsub_demuxer;
> +extern AVInputFormat  ff_voc_demuxer;
> +extern AVOutputFormat ff_voc_muxer;
> +extern AVInputFormat  ff_vpk_demuxer;
> +extern AVInputFormat  ff_vplayer_demuxer;
> +extern AVInputFormat  ff_vqf_demuxer;
> +extern AVInputFormat  ff_w64_demuxer;
> +extern AVOutputFormat ff_w64_muxer;
> +extern AVInputFormat  ff_wav_demuxer;
> +extern AVOutputFormat ff_wav_muxer;
> +extern AVInputFormat  ff_wc3_demuxer;
> +extern AVOutputFormat ff_webm_muxer;
> +extern AVInputFormat  ff_webm_dash_manifest_demuxer;
> +extern AVOutputFormat ff_webm_dash_manifest_muxer;
> +extern AVOutputFormat ff_webm_chunk_muxer;
> +extern AVOutputFormat ff_webp_muxer;
> +extern AVInputFormat  ff_webvtt_demuxer;
> +extern AVOutputFormat ff_webvtt_muxer;
> +extern AVInputFormat  ff_wsaud_demuxer;
> +extern AVInputFormat  ff_wsd_demuxer;
> +extern AVInputFormat  ff_wsvqa_demuxer;
> +extern AVInputFormat  ff_wtv_demuxer;
> +extern AVOutputFormat ff_wtv_muxer;
> +extern AVInputFormat  ff_wve_demuxer;
> +extern AVInputFormat  ff_wv_demuxer;
> +extern AVOutputFormat ff_wv_muxer;
> +extern AVInputFormat  ff_xa_demuxer;
> +extern AVInputFormat  ff_xbin_demuxer;
> +extern AVInputFormat  ff_xmv_demuxer;
> +extern AVInputFormat  ff_xvag_demuxer;
> +extern AVInputFormat  ff_xwma_demuxer;
> +extern AVInputFormat  ff_yop_demuxer;
> +extern AVInputFormat  ff_yuv4mpegpipe_demuxer;
> +extern AVOutputFormat ff_yuv4mpegpipe_muxer;
> +/* image demuxers */
> +extern AVInputFormat  ff_image_bmp_pipe_demuxer;
> +extern AVInputFormat  ff_image_dds_pipe_demuxer;
> +extern AVInputFormat  ff_image_dpx_pipe_demuxer;
> +extern AVInputFormat  ff_image_exr_pipe_demuxer;
> +extern AVInputFormat  ff_image_j2k_pipe_demuxer;
> +extern AVInputFormat  ff_image_jpeg_pipe_demuxer;
> +extern AVInputFormat  ff_image_jpegls_pipe_demuxer;
> +extern AVInputFormat  ff_image_pam_pipe_demuxer;
> +extern AVInputFormat  ff_image_pbm_pipe_demuxer;
> +extern AVInputFormat  ff_image_pcx_pipe_demuxer;
> +extern AVInputFormat  ff_image_pgmyuv_pipe_demuxer;
> +extern AVInputFormat  ff_image_pgm_pipe_demuxer;
> +extern AVInputFormat  ff_image_pictor_pipe_demuxer;
> +extern AVInputFormat  ff_image_png_pipe_demuxer;
> +extern AVInputFormat  ff_image_ppm_pipe_demuxer;
> +extern AVInputFormat  ff_image_psd_pipe_demuxer;
> +extern AVInputFormat  ff_image_qdraw_pipe_demuxer;
> +extern AVInputFormat  ff_image_sgi_pipe_demuxer;
> +extern AVInputFormat  ff_image_svg_pipe_demuxer;
> +extern AVInputFormat  ff_image_sunrast_pipe_demuxer;
> +extern AVInputFormat  ff_image_tiff_pipe_demuxer;
> +extern AVInputFormat  ff_image_webp_pipe_demuxer;
> +extern AVInputFormat  ff_image_xpm_pipe_demuxer;
>
> -#define REGISTER_DEMUXER(X, x)                                          \
> -    {                                                                   \
> -        extern AVInputFormat ff_##x##_demuxer;                          \
> -        if (CONFIG_##X##_DEMUXER)                                       \
> -            av_register_input_format(&ff_##x##_demuxer);                \
> -    }
> +/* external libraries */
> +extern AVOutputFormat ff_chromaprint_muxer;
> +extern AVInputFormat  ff_libgme_demuxer;
> +extern AVInputFormat  ff_libmodplug_demuxer;
> +extern AVInputFormat  ff_libopenmpt_demuxer;
>
> -#define REGISTER_MUXDEMUX(X, x) REGISTER_MUXER(X, x); REGISTER_DEMUXER(X, x)
> +#include "libavformat/muxer_list.c"
> +#include "libavformat/demuxer_list.c"
>
> -static void register_all(void)
> +const AVOutputFormat *av_muxer_iterate(void **opaque)
>  {
> -    avcodec_register_all();
> +    uintptr_t i = (uintptr_t)*opaque;
> +    const AVOutputFormat *f = muxer_list[i];
> +    if (f)
> +        *opaque = (void*)(i + 1);
> +    return f;
> +}
>
> -    /* (de)muxers */
> -    REGISTER_MUXER   (A64,              a64);
> -    REGISTER_DEMUXER (AA,               aa);
> -    REGISTER_DEMUXER (AAC,              aac);
> -    REGISTER_MUXDEMUX(AC3,              ac3);
> -    REGISTER_DEMUXER (ACM,              acm);
> -    REGISTER_DEMUXER (ACT,              act);
> -    REGISTER_DEMUXER (ADF,              adf);
> -    REGISTER_DEMUXER (ADP,              adp);
> -    REGISTER_DEMUXER (ADS,              ads);
> -    REGISTER_MUXER   (ADTS,             adts);
> -    REGISTER_MUXDEMUX(ADX,              adx);
> -    REGISTER_DEMUXER (AEA,              aea);
> -    REGISTER_DEMUXER (AFC,              afc);
> -    REGISTER_MUXDEMUX(AIFF,             aiff);
> -    REGISTER_DEMUXER (AIX,              aix);
> -    REGISTER_MUXDEMUX(AMR,              amr);
> -    REGISTER_DEMUXER (AMRNB,            amrnb);
> -    REGISTER_DEMUXER (AMRWB,            amrwb);
> -    REGISTER_DEMUXER (ANM,              anm);
> -    REGISTER_DEMUXER (APC,              apc);
> -    REGISTER_DEMUXER (APE,              ape);
> -    REGISTER_MUXDEMUX(APNG,             apng);
> -    REGISTER_MUXDEMUX(APTX,             aptx);
> -    REGISTER_DEMUXER (AQTITLE,          aqtitle);
> -    REGISTER_MUXDEMUX(ASF,              asf);
> -    REGISTER_DEMUXER (ASF_O,            asf_o);
> -    REGISTER_MUXDEMUX(ASS,              ass);
> -    REGISTER_MUXDEMUX(AST,              ast);
> -    REGISTER_MUXER   (ASF_STREAM,       asf_stream);
> -    REGISTER_MUXDEMUX(AU,               au);
> -    REGISTER_MUXDEMUX(AVI,              avi);
> -    REGISTER_DEMUXER (AVISYNTH,         avisynth);
> -    REGISTER_MUXER   (AVM2,             avm2);
> -    REGISTER_DEMUXER (AVR,              avr);
> -    REGISTER_DEMUXER (AVS,              avs);
> -    REGISTER_DEMUXER (BETHSOFTVID,      bethsoftvid);
> -    REGISTER_DEMUXER (BFI,              bfi);
> -    REGISTER_DEMUXER (BINTEXT,          bintext);
> -    REGISTER_DEMUXER (BINK,             bink);
> -    REGISTER_MUXDEMUX(BIT,              bit);
> -    REGISTER_DEMUXER (BMV,              bmv);
> -    REGISTER_DEMUXER (BFSTM,            bfstm);
> -    REGISTER_DEMUXER (BRSTM,            brstm);
> -    REGISTER_DEMUXER (BOA,              boa);
> -    REGISTER_DEMUXER (C93,              c93);
> -    REGISTER_MUXDEMUX(CAF,              caf);
> -    REGISTER_MUXDEMUX(CAVSVIDEO,        cavsvideo);
> -    REGISTER_DEMUXER (CDG,              cdg);
> -    REGISTER_DEMUXER (CDXL,             cdxl);
> -    REGISTER_DEMUXER (CINE,             cine);
> -    REGISTER_DEMUXER (CONCAT,           concat);
> -    REGISTER_MUXER   (CRC,              crc);
> -    REGISTER_MUXDEMUX(DASH,             dash);
> -    REGISTER_MUXDEMUX(DATA,             data);
> -    REGISTER_MUXDEMUX(DAUD,             daud);
> -    REGISTER_DEMUXER (DCSTR,            dcstr);
> -    REGISTER_DEMUXER (DFA,              dfa);
> -    REGISTER_MUXDEMUX(DIRAC,            dirac);
> -    REGISTER_MUXDEMUX(DNXHD,            dnxhd);
> -    REGISTER_DEMUXER (DSF,              dsf);
> -    REGISTER_DEMUXER (DSICIN,           dsicin);
> -    REGISTER_DEMUXER (DSS,              dss);
> -    REGISTER_MUXDEMUX(DTS,              dts);
> -    REGISTER_DEMUXER (DTSHD,            dtshd);
> -    REGISTER_MUXDEMUX(DV,               dv);
> -    REGISTER_DEMUXER (DVBSUB,           dvbsub);
> -    REGISTER_DEMUXER (DVBTXT,           dvbtxt);
> -    REGISTER_DEMUXER (DXA,              dxa);
> -    REGISTER_DEMUXER (EA,               ea);
> -    REGISTER_DEMUXER (EA_CDATA,         ea_cdata);
> -    REGISTER_MUXDEMUX(EAC3,             eac3);
> -    REGISTER_DEMUXER (EPAF,             epaf);
> -    REGISTER_MUXER   (F4V,              f4v);
> -    REGISTER_MUXDEMUX(FFMETADATA,       ffmetadata);
> -    REGISTER_MUXER   (FIFO,             fifo);
> -    REGISTER_MUXDEMUX(FILMSTRIP,        filmstrip);
> -    REGISTER_MUXDEMUX(FITS,             fits);
> -    REGISTER_MUXDEMUX(FLAC,             flac);
> -    REGISTER_DEMUXER (FLIC,             flic);
> -    REGISTER_MUXDEMUX(FLV,              flv);
> -    REGISTER_DEMUXER (LIVE_FLV,         live_flv);
> -    REGISTER_DEMUXER (FOURXM,           fourxm);
> -    REGISTER_MUXER   (FRAMECRC,         framecrc);
> -    REGISTER_MUXER   (FRAMEHASH,        framehash);
> -    REGISTER_MUXER   (FRAMEMD5,         framemd5);
> -    REGISTER_DEMUXER (FRM,              frm);
> -    REGISTER_DEMUXER (FSB,              fsb);
> -    REGISTER_MUXDEMUX(G722,             g722);
> -    REGISTER_MUXDEMUX(G723_1,           g723_1);
> -    REGISTER_MUXDEMUX(G726,             g726);
> -    REGISTER_MUXDEMUX(G726LE,           g726le);
> -    REGISTER_DEMUXER (G729,             g729);
> -    REGISTER_DEMUXER (GDV,              gdv);
> -    REGISTER_DEMUXER (GENH,             genh);
> -    REGISTER_MUXDEMUX(GIF,              gif);
> -    REGISTER_MUXDEMUX(GSM,              gsm);
> -    REGISTER_MUXDEMUX(GXF,              gxf);
> -    REGISTER_MUXDEMUX(H261,             h261);
> -    REGISTER_MUXDEMUX(H263,             h263);
> -    REGISTER_MUXDEMUX(H264,             h264);
> -    REGISTER_MUXER   (HASH,             hash);
> -    REGISTER_MUXER   (HDS,              hds);
> -    REGISTER_MUXDEMUX(HEVC,             hevc);
> -    REGISTER_MUXDEMUX(HLS,              hls);
> -    REGISTER_DEMUXER (HNM,              hnm);
> -    REGISTER_MUXDEMUX(ICO,              ico);
> -    REGISTER_DEMUXER (IDCIN,            idcin);
> -    REGISTER_DEMUXER (IDF,              idf);
> -    REGISTER_DEMUXER (IFF,              iff);
> -    REGISTER_MUXDEMUX(ILBC,             ilbc);
> -    REGISTER_MUXDEMUX(IMAGE2,           image2);
> -    REGISTER_MUXDEMUX(IMAGE2PIPE,       image2pipe);
> -    REGISTER_DEMUXER (IMAGE2_ALIAS_PIX, image2_alias_pix);
> -    REGISTER_DEMUXER (IMAGE2_BRENDER_PIX, image2_brender_pix);
> -    REGISTER_DEMUXER (INGENIENT,        ingenient);
> -    REGISTER_DEMUXER (IPMOVIE,          ipmovie);
> -    REGISTER_MUXER   (IPOD,             ipod);
> -    REGISTER_MUXDEMUX(IRCAM,            ircam);
> -    REGISTER_MUXER   (ISMV,             ismv);
> -    REGISTER_DEMUXER (ISS,              iss);
> -    REGISTER_DEMUXER (IV8,              iv8);
> -    REGISTER_MUXDEMUX(IVF,              ivf);
> -    REGISTER_DEMUXER (IVR,              ivr);
> -    REGISTER_MUXDEMUX(JACOSUB,          jacosub);
> -    REGISTER_DEMUXER (JV,               jv);
> -    REGISTER_MUXER   (LATM,             latm);
> -    REGISTER_DEMUXER (LMLM4,            lmlm4);
> -    REGISTER_DEMUXER (LOAS,             loas);
> -    REGISTER_MUXDEMUX(LRC,              lrc);
> -    REGISTER_DEMUXER (LVF,              lvf);
> -    REGISTER_DEMUXER (LXF,              lxf);
> -    REGISTER_MUXDEMUX(M4V,              m4v);
> -    REGISTER_MUXER   (MD5,              md5);
> -    REGISTER_MUXDEMUX(MATROSKA,         matroska);
> -    REGISTER_MUXER   (MATROSKA_AUDIO,   matroska_audio);
> -    REGISTER_DEMUXER (MGSTS,            mgsts);
> -    REGISTER_MUXDEMUX(MICRODVD,         microdvd);
> -    REGISTER_MUXDEMUX(MJPEG,            mjpeg);
> -    REGISTER_DEMUXER (MJPEG_2000,       mjpeg_2000);
> -    REGISTER_MUXDEMUX(MLP,              mlp);
> -    REGISTER_DEMUXER (MLV,              mlv);
> -    REGISTER_DEMUXER (MM,               mm);
> -    REGISTER_MUXDEMUX(MMF,              mmf);
> -    REGISTER_MUXDEMUX(MOV,              mov);
> -    REGISTER_MUXER   (MP2,              mp2);
> -    REGISTER_MUXDEMUX(MP3,              mp3);
> -    REGISTER_MUXER   (MP4,              mp4);
> -    REGISTER_DEMUXER (MPC,              mpc);
> -    REGISTER_DEMUXER (MPC8,             mpc8);
> -    REGISTER_MUXER   (MPEG1SYSTEM,      mpeg1system);
> -    REGISTER_MUXER   (MPEG1VCD,         mpeg1vcd);
> -    REGISTER_MUXER   (MPEG1VIDEO,       mpeg1video);
> -    REGISTER_MUXER   (MPEG2DVD,         mpeg2dvd);
> -    REGISTER_MUXER   (MPEG2SVCD,        mpeg2svcd);
> -    REGISTER_MUXER   (MPEG2VIDEO,       mpeg2video);
> -    REGISTER_MUXER   (MPEG2VOB,         mpeg2vob);
> -    REGISTER_DEMUXER (MPEGPS,           mpegps);
> -    REGISTER_MUXDEMUX(MPEGTS,           mpegts);
> -    REGISTER_DEMUXER (MPEGTSRAW,        mpegtsraw);
> -    REGISTER_DEMUXER (MPEGVIDEO,        mpegvideo);
> -    REGISTER_MUXDEMUX(MPJPEG,           mpjpeg);
> -    REGISTER_DEMUXER (MPL2,             mpl2);
> -    REGISTER_DEMUXER (MPSUB,            mpsub);
> -    REGISTER_DEMUXER (MSF,              msf);
> -    REGISTER_DEMUXER (MSNWC_TCP,        msnwc_tcp);
> -    REGISTER_DEMUXER (MTAF,             mtaf);
> -    REGISTER_DEMUXER (MTV,              mtv);
> -    REGISTER_DEMUXER (MUSX,             musx);
> -    REGISTER_DEMUXER (MV,               mv);
> -    REGISTER_DEMUXER (MVI,              mvi);
> -    REGISTER_MUXDEMUX(MXF,              mxf);
> -    REGISTER_MUXER   (MXF_D10,          mxf_d10);
> -    REGISTER_MUXER   (MXF_OPATOM,       mxf_opatom);
> -    REGISTER_DEMUXER (MXG,              mxg);
> -    REGISTER_DEMUXER (NC,               nc);
> -    REGISTER_DEMUXER (NISTSPHERE,       nistsphere);
> -    REGISTER_DEMUXER (NSP,              nsp);
> -    REGISTER_DEMUXER (NSV,              nsv);
> -    REGISTER_MUXER   (NULL,             null);
> -    REGISTER_MUXDEMUX(NUT,              nut);
> -    REGISTER_DEMUXER (NUV,              nuv);
> -    REGISTER_MUXER   (OGA,              oga);
> -    REGISTER_MUXDEMUX(OGG,              ogg);
> -    REGISTER_MUXER   (OGV,              ogv);
> -    REGISTER_MUXDEMUX(OMA,              oma);
> -    REGISTER_MUXER   (OPUS,             opus);
> -    REGISTER_DEMUXER (PAF,              paf);
> -    REGISTER_MUXDEMUX(PCM_ALAW,         pcm_alaw);
> -    REGISTER_MUXDEMUX(PCM_MULAW,        pcm_mulaw);
> -    REGISTER_MUXDEMUX(PCM_F64BE,        pcm_f64be);
> -    REGISTER_MUXDEMUX(PCM_F64LE,        pcm_f64le);
> -    REGISTER_MUXDEMUX(PCM_F32BE,        pcm_f32be);
> -    REGISTER_MUXDEMUX(PCM_F32LE,        pcm_f32le);
> -    REGISTER_MUXDEMUX(PCM_S32BE,        pcm_s32be);
> -    REGISTER_MUXDEMUX(PCM_S32LE,        pcm_s32le);
> -    REGISTER_MUXDEMUX(PCM_S24BE,        pcm_s24be);
> -    REGISTER_MUXDEMUX(PCM_S24LE,        pcm_s24le);
> -    REGISTER_MUXDEMUX(PCM_S16BE,        pcm_s16be);
> -    REGISTER_MUXDEMUX(PCM_S16LE,        pcm_s16le);
> -    REGISTER_MUXDEMUX(PCM_S8,           pcm_s8);
> -    REGISTER_MUXDEMUX(PCM_U32BE,        pcm_u32be);
> -    REGISTER_MUXDEMUX(PCM_U32LE,        pcm_u32le);
> -    REGISTER_MUXDEMUX(PCM_U24BE,        pcm_u24be);
> -    REGISTER_MUXDEMUX(PCM_U24LE,        pcm_u24le);
> -    REGISTER_MUXDEMUX(PCM_U16BE,        pcm_u16be);
> -    REGISTER_MUXDEMUX(PCM_U16LE,        pcm_u16le);
> -    REGISTER_MUXDEMUX(PCM_U8,           pcm_u8);
> -    REGISTER_DEMUXER (PJS,              pjs);
> -    REGISTER_DEMUXER (PMP,              pmp);
> -    REGISTER_MUXER   (PSP,              psp);
> -    REGISTER_DEMUXER (PVA,              pva);
> -    REGISTER_DEMUXER (PVF,              pvf);
> -    REGISTER_DEMUXER (QCP,              qcp);
> -    REGISTER_DEMUXER (R3D,              r3d);
> -    REGISTER_MUXDEMUX(RAWVIDEO,         rawvideo);
> -    REGISTER_DEMUXER (REALTEXT,         realtext);
> -    REGISTER_DEMUXER (REDSPARK,         redspark);
> -    REGISTER_DEMUXER (RL2,              rl2);
> -    REGISTER_MUXDEMUX(RM,               rm);
> -    REGISTER_MUXDEMUX(ROQ,              roq);
> -    REGISTER_DEMUXER (RPL,              rpl);
> -    REGISTER_DEMUXER (RSD,              rsd);
> -    REGISTER_MUXDEMUX(RSO,              rso);
> -    REGISTER_MUXDEMUX(RTP,              rtp);
> -    REGISTER_MUXER   (RTP_MPEGTS,       rtp_mpegts);
> -    REGISTER_MUXDEMUX(RTSP,             rtsp);
> -    REGISTER_DEMUXER (S337M,            s337m);
> -    REGISTER_DEMUXER (SAMI,             sami);
> -    REGISTER_MUXDEMUX(SAP,              sap);
> -    REGISTER_DEMUXER (SBG,              sbg);
> -    REGISTER_MUXDEMUX(SCC,              scc);
> -    REGISTER_DEMUXER (SDP,              sdp);
> -    REGISTER_DEMUXER (SDR2,             sdr2);
> -    REGISTER_DEMUXER (SDS,              sds);
> -    REGISTER_DEMUXER (SDX,              sdx);
> -    REGISTER_DEMUXER (SEGAFILM,         segafilm);
> -    REGISTER_MUXER   (SEGMENT,          segment);
> -    REGISTER_MUXER   (SEGMENT,          stream_segment);
> -    REGISTER_DEMUXER (SHORTEN,          shorten);
> -    REGISTER_DEMUXER (SIFF,             siff);
> -    REGISTER_MUXER   (SINGLEJPEG,       singlejpeg);
> -    REGISTER_DEMUXER (SLN,              sln);
> -    REGISTER_DEMUXER (SMACKER,          smacker);
> -    REGISTER_MUXDEMUX(SMJPEG,           smjpeg);
> -    REGISTER_MUXER   (SMOOTHSTREAMING,  smoothstreaming);
> -    REGISTER_DEMUXER (SMUSH,            smush);
> -    REGISTER_DEMUXER (SOL,              sol);
> -    REGISTER_MUXDEMUX(SOX,              sox);
> -    REGISTER_MUXER   (SPX,              spx);
> -    REGISTER_MUXDEMUX(SPDIF,            spdif);
> -    REGISTER_MUXDEMUX(SRT,              srt);
> -    REGISTER_DEMUXER (STR,              str);
> -    REGISTER_DEMUXER (STL,              stl);
> -    REGISTER_DEMUXER (SUBVIEWER1,       subviewer1);
> -    REGISTER_DEMUXER (SUBVIEWER,        subviewer);
> -    REGISTER_MUXDEMUX(SUP,              sup);
> -    REGISTER_DEMUXER (SVAG,             svag);
> -    REGISTER_MUXDEMUX(SWF,              swf);
> -    REGISTER_DEMUXER (TAK,              tak);
> -    REGISTER_MUXER   (TEE,              tee);
> -    REGISTER_DEMUXER (TEDCAPTIONS,      tedcaptions);
> -    REGISTER_MUXER   (TG2,              tg2);
> -    REGISTER_MUXER   (TGP,              tgp);
> -    REGISTER_DEMUXER (THP,              thp);
> -    REGISTER_DEMUXER (THREEDOSTR,       threedostr);
> -    REGISTER_DEMUXER (TIERTEXSEQ,       tiertexseq);
> -    REGISTER_MUXER   (MKVTIMESTAMP_V2,  mkvtimestamp_v2);
> -    REGISTER_DEMUXER (TMV,              tmv);
> -    REGISTER_MUXDEMUX(TRUEHD,           truehd);
> -    REGISTER_MUXDEMUX(TTA,              tta);
> -    REGISTER_DEMUXER (TXD,              txd);
> -    REGISTER_DEMUXER (TTY,              tty);
> -    REGISTER_DEMUXER (TY,               ty);
> -    REGISTER_MUXER   (UNCODEDFRAMECRC,  uncodedframecrc);
> -    REGISTER_DEMUXER (V210,             v210);
> -    REGISTER_DEMUXER (V210X,            v210x);
> -    REGISTER_DEMUXER (VAG,              vag);
> -    REGISTER_MUXDEMUX(VC1,              vc1);
> -    REGISTER_MUXDEMUX(VC1T,             vc1t);
> -    REGISTER_DEMUXER (VIVO,             vivo);
> -    REGISTER_DEMUXER (VMD,              vmd);
> -    REGISTER_DEMUXER (VOBSUB,           vobsub);
> -    REGISTER_MUXDEMUX(VOC,              voc);
> -    REGISTER_DEMUXER (VPK,              vpk);
> -    REGISTER_DEMUXER (VPLAYER,          vplayer);
> -    REGISTER_DEMUXER (VQF,              vqf);
> -    REGISTER_MUXDEMUX(W64,              w64);
> -    REGISTER_MUXDEMUX(WAV,              wav);
> -    REGISTER_DEMUXER (WC3,              wc3);
> -    REGISTER_MUXER   (WEBM,             webm);
> -    REGISTER_MUXDEMUX(WEBM_DASH_MANIFEST, webm_dash_manifest);
> -    REGISTER_MUXER   (WEBM_CHUNK,       webm_chunk);
> -    REGISTER_MUXER   (WEBP,             webp);
> -    REGISTER_MUXDEMUX(WEBVTT,           webvtt);
> -    REGISTER_DEMUXER (WSAUD,            wsaud);
> -    REGISTER_DEMUXER (WSD,              wsd);
> -    REGISTER_DEMUXER (WSVQA,            wsvqa);
> -    REGISTER_MUXDEMUX(WTV,              wtv);
> -    REGISTER_DEMUXER (WVE,              wve);
> -    REGISTER_MUXDEMUX(WV,               wv);
> -    REGISTER_DEMUXER (XA,               xa);
> -    REGISTER_DEMUXER (XBIN,             xbin);
> -    REGISTER_DEMUXER (XMV,              xmv);
> -    REGISTER_DEMUXER (XVAG,             xvag);
> -    REGISTER_DEMUXER (XWMA,             xwma);
> -    REGISTER_DEMUXER (YOP,              yop);
> -    REGISTER_MUXDEMUX(YUV4MPEGPIPE,     yuv4mpegpipe);
> +const AVInputFormat *av_demuxer_iterate(void **opaque){
> +    uintptr_t i = (uintptr_t)*opaque;
> +    const AVInputFormat *f = demuxer_list[i];
>
> -    /* image demuxers */
> -    REGISTER_DEMUXER (IMAGE_BMP_PIPE,        image_bmp_pipe);
> -    REGISTER_DEMUXER (IMAGE_DDS_PIPE,        image_dds_pipe);
> -    REGISTER_DEMUXER (IMAGE_DPX_PIPE,        image_dpx_pipe);
> -    REGISTER_DEMUXER (IMAGE_EXR_PIPE,        image_exr_pipe);
> -    REGISTER_DEMUXER (IMAGE_J2K_PIPE,        image_j2k_pipe);
> -    REGISTER_DEMUXER (IMAGE_JPEG_PIPE,       image_jpeg_pipe);
> -    REGISTER_DEMUXER (IMAGE_JPEGLS_PIPE,     image_jpegls_pipe);
> -    REGISTER_DEMUXER (IMAGE_PAM_PIPE,        image_pam_pipe);
> -    REGISTER_DEMUXER (IMAGE_PBM_PIPE,        image_pbm_pipe);
> -    REGISTER_DEMUXER (IMAGE_PCX_PIPE,        image_pcx_pipe);
> -    REGISTER_DEMUXER (IMAGE_PGMYUV_PIPE,     image_pgmyuv_pipe);
> -    REGISTER_DEMUXER (IMAGE_PGM_PIPE,        image_pgm_pipe);
> -    REGISTER_DEMUXER (IMAGE_PICTOR_PIPE,     image_pictor_pipe);
> -    REGISTER_DEMUXER (IMAGE_PNG_PIPE,        image_png_pipe);
> -    REGISTER_DEMUXER (IMAGE_PPM_PIPE,        image_ppm_pipe);
> -    REGISTER_DEMUXER (IMAGE_PSD_PIPE,        image_psd_pipe);
> -    REGISTER_DEMUXER (IMAGE_QDRAW_PIPE,      image_qdraw_pipe);
> -    REGISTER_DEMUXER (IMAGE_SGI_PIPE,        image_sgi_pipe);
> -    REGISTER_DEMUXER (IMAGE_SVG_PIPE,        image_svg_pipe);
> -    REGISTER_DEMUXER (IMAGE_SUNRAST_PIPE,    image_sunrast_pipe);
> -    REGISTER_DEMUXER (IMAGE_TIFF_PIPE,       image_tiff_pipe);
> -    REGISTER_DEMUXER (IMAGE_WEBP_PIPE,       image_webp_pipe);
> -    REGISTER_DEMUXER (IMAGE_XPM_PIPE,        image_xpm_pipe);
> +    if (f)
> +        *opaque = (void*)(i + 1);
> +    return f;
> +}
> +
> +#if FF_API_NEXT
> +FF_DISABLE_DEPRECATION_WARNINGS
> +static AVOnce av_format_next_init = AV_ONCE_INIT;
>
> -    /* external libraries */
> -    REGISTER_MUXER   (CHROMAPRINT,      chromaprint);
> -    REGISTER_DEMUXER (LIBGME,           libgme);
> -    REGISTER_DEMUXER (LIBMODPLUG,       libmodplug);
> -    REGISTER_DEMUXER (LIBOPENMPT,       libopenmpt);
> +static void av_format_init_next(void)
> +{
> +    AVOutputFormat *prevout = NULL, *out;
> +    AVInputFormat *previn = NULL, *in;
> +    void *i = 0;
> +
> +    while ((out = (AVOutputFormat*)av_muxer_iterate(&i))) {
> +        if (prevout)
> +            prevout->next = out;
> +        prevout = out;
> +    }
> +
> +    i = 0;
> +    while ((in = (AVInputFormat*)av_demuxer_iterate(&i))) {
> +        if (previn)
> +            previn->next = in;
> +        previn = in;
> +    }
> +}
> +
> +AVInputFormat *av_iformat_next(const AVInputFormat *f)
> +{
> +    ff_thread_once(&av_format_next_init, av_format_init_next);
> +    if (f)
> +        return f->next;
> +    else
> +        return demuxer_list[0];
> +}
> +
> +AVOutputFormat *av_oformat_next(const AVOutputFormat *f)
> +{
> +    ff_thread_once(&av_format_next_init, av_format_init_next);
> +    if (f)
> +        return f->next;
> +    else
> +        return muxer_list[0];
>  }
>
>  void av_register_all(void)
>  {
> -    static AVOnce control = AV_ONCE_INIT;
> +    ff_thread_once(&av_format_next_init, av_format_init_next);
> +}
>
> -    ff_thread_once(&control, register_all);
> +void av_register_input_format(AVInputFormat *format)
> +{
> +    ff_thread_once(&av_format_next_init, av_format_init_next);
> +}
> +
> +void av_register_output_format(AVOutputFormat *format)
> +{
> +    ff_thread_once(&av_format_next_init, av_format_init_next);
>  }
> +FF_ENABLE_DEPRECATION_WARNINGS
> +#endif
> diff --git a/libavformat/avformat.h b/libavformat/avformat.h
> index 82f9845..4ea1b5a 100644
> --- a/libavformat/avformat.h
> +++ b/libavformat/avformat.h
> @@ -2011,6 +2011,7 @@ const char *avformat_configuration(void);
>   */
>  const char *avformat_license(void);
>
> +#if FF_API_NEXT
>  /**
>   * Initialize libavformat and register all the muxers, demuxers and
>   * protocols. If you do not call this function, then you can select
> @@ -2019,10 +2020,14 @@ const char *avformat_license(void);
>   * @see av_register_input_format()
>   * @see av_register_output_format()
>   */
> +attribute_deprecated
>  void av_register_all(void);
>
> +attribute_deprecated
>  void av_register_input_format(AVInputFormat *format);
> +attribute_deprecated
>  void av_register_output_format(AVOutputFormat *format);
> +#endif
>
>  /**
>   * Do global initialization of network libraries. This is optional,
> @@ -2046,11 +2051,13 @@ int avformat_network_init(void);
>   */
>  int avformat_network_deinit(void);
>
> +#if FF_API_NEXT
>  /**
>   * If f is NULL, returns the first registered input format,
>   * if f is non-NULL, returns the next registered input format after f
>   * or NULL if f is the last one.
>   */
> +attribute_deprecated
>  AVInputFormat  *av_iformat_next(const AVInputFormat  *f);
>
>  /**
> @@ -2058,7 +2065,31 @@ AVInputFormat  *av_iformat_next(const AVInputFormat  *f);
>   * if f is non-NULL, returns the next registered output format after f
>   * or NULL if f is the last one.
>   */
> +attribute_deprecated
>  AVOutputFormat *av_oformat_next(const AVOutputFormat *f);
> +#endif
> +
> +/**
> + * Iterate over all registered muxers.
> + *
> + * @param opaque a pointer where libavformat will store the iteration state. Must
> + *               point to NULL to start the iteration.
> + *
> + * @return the next registered muxer or NULL when the iteration is
> + *         finished
> + */
> +const AVOutputFormat *av_muxer_iterate(void **opaque);
> +
> +/**
> + * Iterate over all registered demuxers.
> + *
> + * @param opaque a pointer where libavformat will store the iteration state. Must
> + *               point to NULL to start the iteration.
> + *
> + * @return the next registered demuxer or NULL when the iteration is
> + *         finished
> + */
> +const AVInputFormat *av_demuxer_iterate(void **opaque);
>
>  /**
>   * Allocate an AVFormatContext.
> diff --git a/libavformat/format.c b/libavformat/format.c
> index 759b5b1..608af1b 100644
> --- a/libavformat/format.c
> +++ b/libavformat/format.c
> @@ -34,65 +34,6 @@
>   * @file
>   * Format register and lookup
>   */
> -/** head of registered input format linked list */
> -static AVInputFormat *first_iformat = NULL;
> -/** head of registered output format linked list */
> -static AVOutputFormat *first_oformat = NULL;
> -
> -static AVInputFormat **last_iformat = &first_iformat;
> -static AVOutputFormat **last_oformat = &first_oformat;
> -
> -AVInputFormat *av_iformat_next(const AVInputFormat *f)
> -{
> -    if (f)
> -        return f->next;
> -    else
> -        return first_iformat;
> -}
> -
> -AVOutputFormat *av_oformat_next(const AVOutputFormat *f)
> -{
> -    if (f)
> -        return f->next;
> -    else
> -        return first_oformat;
> -}
> -
> -static AVMutex iformat_register_mutex = AV_MUTEX_INITIALIZER;
> -
> -void av_register_input_format(AVInputFormat *format)
> -{
> -    AVInputFormat **p;
> -
> -    ff_mutex_lock(&iformat_register_mutex);
> -    p = last_iformat;
> -
> -    while (*p)
> -        p = &(*p)->next;
> -    *p = format;
> -    format->next = NULL;
> -    last_iformat = &format->next;
> -
> -    ff_mutex_unlock(&iformat_register_mutex);
> -}
> -
> -static AVMutex oformat_register_mutex = AV_MUTEX_INITIALIZER;
> -
> -void av_register_output_format(AVOutputFormat *format)
> -{
> -    AVOutputFormat **p;
> -
> -    ff_mutex_lock(&oformat_register_mutex);
> -    p = last_oformat;
> -
> -    while (*p)
> -        p = &(*p)->next;
> -    *p = format;
> -    format->next = NULL;
> -    last_oformat = &format->next;
> -
> -    ff_mutex_unlock(&oformat_register_mutex);
> -}
>
>  int av_match_ext(const char *filename, const char *extensions)
>  {
> @@ -111,6 +52,7 @@ AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
>                                  const char *mime_type)
>  {
>      AVOutputFormat *fmt = NULL, *fmt_found;
> +    void *i = 0;
>      int score_max, score;
>
>      /* specific test for image sequences */
> @@ -124,7 +66,7 @@ AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
>      /* Find the proper file type. */
>      fmt_found = NULL;
>      score_max = 0;
> -    while ((fmt = av_oformat_next(fmt))) {
> +    while ((fmt = av_muxer_iterate(&i))) {
>          score = 0;
>          if (fmt->name && short_name && av_match_name(short_name, fmt->name))
>              score += 100;
> @@ -176,7 +118,8 @@ enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
>  AVInputFormat *av_find_input_format(const char *short_name)
>  {
>      AVInputFormat *fmt = NULL;
> -    while ((fmt = av_iformat_next(fmt)))
> +    void *i = 0;
> +    while ((fmt = av_demuxer_iterate(&i)))
>          if (av_match_name(short_name, fmt->name))
>              return fmt;
>      return NULL;
> @@ -188,6 +131,7 @@ AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened,
>      AVProbeData lpd = *pd;
>      AVInputFormat *fmt1 = NULL, *fmt;
>      int score, score_max = 0;
> +    void *i = 0;
>      const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
>      enum nodat {
>          NO_ID3,
> @@ -213,7 +157,7 @@ AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened,
>      }
>
>      fmt = NULL;
> -    while ((fmt1 = av_iformat_next(fmt1))) {
> +    while ((fmt1 = av_demuxer_iterate(&i))) {
>          if (!is_opened == !(fmt1->flags & AVFMT_NOFILE) && strcmp(fmt1->name, "image2"))
>              continue;
>          score = 0;
> diff --git a/libavformat/version.h b/libavformat/version.h
> index 897be0c..293f697 100644
> --- a/libavformat/version.h
> +++ b/libavformat/version.h
> @@ -88,6 +88,9 @@
>  #ifndef FF_API_FORMAT_FILENAME
>  #define FF_API_FORMAT_FILENAME          (LIBAVFORMAT_VERSION_MAJOR < 59)
>  #endif
> +#ifndef FF_API_NEXT
> +#define FF_API_NEXT                     (LIBAVFORMAT_VERSION_MAJOR < 59)
> +#endif
>
>
>  #ifndef FF_API_R_FRAME_RATE
> --
> 2.7.4

This command fails:
./ffmpeg -f lavfi -i aevalsrc=0 -f null -
Unknown input format: 'lavfi'

Thank's.
Rostislav Pehlivanov Feb. 6, 2018, 7:17 p.m. UTC | #2 
On 6 February 2018 at 18:10, Muhammad Faiz <mfcc64@gmail.com> wrote:

> On Sat, Feb 3, 2018 at 2:44 AM, Josh de Kock <josh@itanimul.li> wrote:
> > ---
> >  Makefile                 |   3 +-
> >  configure                |   6 +-
> >  doc/APIchanges           |   7 +-
> >  libavformat/.gitignore   |   2 +
> >  libavformat/allformats.c | 866 ++++++++++++++++++++++++++++--
> -----------------
> >  libavformat/avformat.h   |  31 ++
> >  libavformat/format.c     |  68 +---
> >  libavformat/version.h    |   3 +
> >  8 files changed, 566 insertions(+), 420 deletions(-)
> >
> > diff --git a/Makefile b/Makefile
> > index 1d1c886..0cd0a1d 100644
> > --- a/Makefile
> > +++ b/Makefile
> > @@ -143,7 +143,8 @@ distclean:: clean
> >                 ffbuild/.config ffbuild/config.* libavutil/avconfig.h \
> >                 version.h libavutil/ffversion.h libavcodec/codec_names.h
> \
> >                 libavcodec/bsf_list.c libavformat/protocol_list.c \
> > -               libavcodec/codec_list.c libavcodec/parser_list.c
> > +               libavcodec/codec_list.c libavcodec/parser_list.c \
> > +               libavformat/muxer_list.c libavformat/demuxer_list.c
> >  ifeq ($(SRC_LINK),src)
> >         $(RM) src
> >  endif
> > diff --git a/configure b/configure
> > index e8795d8..d6d7980 100755
> > --- a/configure
> > +++ b/configure
> > @@ -3523,8 +3523,6 @@ find_things(){
> >      sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p"
> "$file"
> >  }
> >
> > -MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
> > -DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
> >  OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
> >  INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
> >  FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
> > @@ -3536,6 +3534,8 @@ find_things_extern(){
> >      sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p"
> "$file"
> >  }
> >
> > +MUXER_LIST=$(find_things_extern muxer AVOutputFormat
> libavformat/allformats.c)
> > +DEMUXER_LIST=$(find_things_extern demuxer AVInputFormat
> libavformat/allformats.c)
> >  ENCODER_LIST=$(find_things_extern encoder AVCodec
> libavcodec/allcodecs.c)
> >  DECODER_LIST=$(find_things_extern decoder AVCodec
> libavcodec/allcodecs.c)
> >  CODEC_LIST="
> > @@ -7034,6 +7034,8 @@ print_enabled_components(){
> >  print_enabled_components libavcodec/codec_list.c AVCodec codec_list
> $CODEC_LIST
> >  print_enabled_components libavcodec/parser_list.c AVCodecParser
> parser_list $PARSER_LIST
> >  print_enabled_components libavcodec/bsf_list.c AVBitStreamFilter
> bitstream_filters $BSF_LIST
> > +print_enabled_components libavformat/demuxer_list.c AVInputFormat
> demuxer_list $DEMUXER_LIST
> > +print_enabled_components libavformat/muxer_list.c AVOutputFormat
> muxer_list $MUXER_LIST
> >  print_enabled_components libavformat/protocol_list.c URLProtocol
> url_protocols $PROTOCOL_LIST
> >
> >  # Settings for pkg-config files
> > diff --git a/doc/APIchanges b/doc/APIchanges
> > index 77da22c..2a12f22 100644
> > --- a/doc/APIchanges
> > +++ b/doc/APIchanges
> > @@ -15,7 +15,12 @@ libavutil:     2017-10-21
> >
> >  API changes, most recent first:
> >
> > -2018-01-xx - xxxxxxx - lavc 58.9.100 - avcodec.h
> > +2018-xx-xx - xxxxxxx - lavf 58.9.100 - avformat.h
> > +  Deprecate use of av_register_input_format(),
> av_register_output_format(),
> > +  avformat_register_all(), av_iformat_next(), av_oformat_next().
> > +  Add av_demuxer_iterate(), and av_muxer_iterate().
> > +
> > +2018-xx-xx - xxxxxxx - lavc 58.9.100 - avcodec.h
> >    Deprecate use of avcodec_register(), avcodec_register_all(), and
> >    av_codec_next(). Add av_codec_iterate().
> >
> > diff --git a/libavformat/.gitignore b/libavformat/.gitignore
> > index cdc24b7..fb70c12 100644
> > --- a/libavformat/.gitignore
> > +++ b/libavformat/.gitignore
> > @@ -1 +1,3 @@
> >  /protocol_list.c
> > +/muxer_list.c
> > +/demuxer_list.c
> > diff --git a/libavformat/allformats.c b/libavformat/allformats.c
> > index 83ed766..0f198d5 100644
> > --- a/libavformat/allformats.c
> > +++ b/libavformat/allformats.c
> > @@ -26,370 +26,528 @@
> >  #include "url.h"
> >  #include "version.h"
> >
> > -#define REGISTER_MUXER(X, x)
> \
> > -    {
>  \
> > -        extern AVOutputFormat ff_##x##_muxer;
>  \
> > -        if (CONFIG_##X##_MUXER)
>  \
> > -            av_register_output_format(&ff_##x##_muxer);
>  \
> > -    }
> > +/* (de)muxers */
> > +extern AVOutputFormat ff_a64_muxer;
> > +extern AVInputFormat  ff_aa_demuxer;
> > +extern AVInputFormat  ff_aac_demuxer;
> > +extern AVInputFormat  ff_ac3_demuxer;
> > +extern AVOutputFormat ff_ac3_muxer;
> > +extern AVInputFormat  ff_acm_demuxer;
> > +extern AVInputFormat  ff_act_demuxer;
> > +extern AVInputFormat  ff_adf_demuxer;
> > +extern AVInputFormat  ff_adp_demuxer;
> > +extern AVInputFormat  ff_ads_demuxer;
> > +extern AVOutputFormat ff_adts_muxer;
> > +extern AVInputFormat  ff_adx_demuxer;
> > +extern AVOutputFormat ff_adx_muxer;
> > +extern AVInputFormat  ff_aea_demuxer;
> > +extern AVInputFormat  ff_afc_demuxer;
> > +extern AVInputFormat  ff_aiff_demuxer;
> > +extern AVOutputFormat ff_aiff_muxer;
> > +extern AVInputFormat  ff_aix_demuxer;
> > +extern AVInputFormat  ff_amr_demuxer;
> > +extern AVOutputFormat ff_amr_muxer;
> > +extern AVInputFormat  ff_amrnb_demuxer;
> > +extern AVInputFormat  ff_amrwb_demuxer;
> > +extern AVInputFormat  ff_anm_demuxer;
> > +extern AVInputFormat  ff_apc_demuxer;
> > +extern AVInputFormat  ff_ape_demuxer;
> > +extern AVInputFormat  ff_apng_demuxer;
> > +extern AVOutputFormat ff_apng_muxer;
> > +extern AVInputFormat  ff_aptx_demuxer;
> > +extern AVOutputFormat ff_aptx_muxer;
> > +extern AVInputFormat  ff_aqtitle_demuxer;
> > +extern AVInputFormat  ff_asf_demuxer;
> > +extern AVOutputFormat ff_asf_muxer;
> > +extern AVInputFormat  ff_asf_o_demuxer;
> > +extern AVInputFormat  ff_ass_demuxer;
> > +extern AVOutputFormat ff_ass_muxer;
> > +extern AVInputFormat  ff_ast_demuxer;
> > +extern AVOutputFormat ff_ast_muxer;
> > +extern AVOutputFormat ff_asf_stream_muxer;
> > +extern AVInputFormat  ff_au_demuxer;
> > +extern AVOutputFormat ff_au_muxer;
> > +extern AVInputFormat  ff_avi_demuxer;
> > +extern AVOutputFormat ff_avi_muxer;
> > +extern AVInputFormat  ff_avisynth_demuxer;
> > +extern AVOutputFormat ff_avm2_muxer;
> > +extern AVInputFormat  ff_avr_demuxer;
> > +extern AVInputFormat  ff_avs_demuxer;
> > +extern AVInputFormat  ff_bethsoftvid_demuxer;
> > +extern AVInputFormat  ff_bfi_demuxer;
> > +extern AVInputFormat  ff_bintext_demuxer;
> > +extern AVInputFormat  ff_bink_demuxer;
> > +extern AVInputFormat  ff_bit_demuxer;
> > +extern AVOutputFormat ff_bit_muxer;
> > +extern AVInputFormat  ff_bmv_demuxer;
> > +extern AVInputFormat  ff_bfstm_demuxer;
> > +extern AVInputFormat  ff_brstm_demuxer;
> > +extern AVInputFormat  ff_boa_demuxer;
> > +extern AVInputFormat  ff_c93_demuxer;
> > +extern AVInputFormat  ff_caf_demuxer;
> > +extern AVOutputFormat ff_caf_muxer;
> > +extern AVInputFormat  ff_cavsvideo_demuxer;
> > +extern AVOutputFormat ff_cavsvideo_muxer;
> > +extern AVInputFormat  ff_cdg_demuxer;
> > +extern AVInputFormat  ff_cdxl_demuxer;
> > +extern AVInputFormat  ff_cine_demuxer;
> > +extern AVInputFormat  ff_concat_demuxer;
> > +extern AVOutputFormat ff_crc_muxer;
> > +extern AVInputFormat  ff_dash_demuxer;
> > +extern AVOutputFormat ff_dash_muxer;
> > +extern AVInputFormat  ff_data_demuxer;
> > +extern AVOutputFormat ff_data_muxer;
> > +extern AVInputFormat  ff_daud_demuxer;
> > +extern AVOutputFormat ff_daud_muxer;
> > +extern AVInputFormat  ff_dcstr_demuxer;
> > +extern AVInputFormat  ff_dfa_demuxer;
> > +extern AVInputFormat  ff_dirac_demuxer;
> > +extern AVOutputFormat ff_dirac_muxer;
> > +extern AVInputFormat  ff_dnxhd_demuxer;
> > +extern AVOutputFormat ff_dnxhd_muxer;
> > +extern AVInputFormat  ff_dsf_demuxer;
> > +extern AVInputFormat  ff_dsicin_demuxer;
> > +extern AVInputFormat  ff_dss_demuxer;
> > +extern AVInputFormat  ff_dts_demuxer;
> > +extern AVOutputFormat ff_dts_muxer;
> > +extern AVInputFormat  ff_dtshd_demuxer;
> > +extern AVInputFormat  ff_dv_demuxer;
> > +extern AVOutputFormat ff_dv_muxer;
> > +extern AVInputFormat  ff_dvbsub_demuxer;
> > +extern AVInputFormat  ff_dvbtxt_demuxer;
> > +extern AVInputFormat  ff_dxa_demuxer;
> > +extern AVInputFormat  ff_ea_demuxer;
> > +extern AVInputFormat  ff_ea_cdata_demuxer;
> > +extern AVInputFormat  ff_eac3_demuxer;
> > +extern AVOutputFormat ff_eac3_muxer;
> > +extern AVInputFormat  ff_epaf_demuxer;
> > +extern AVOutputFormat ff_f4v_muxer;
> > +extern AVInputFormat  ff_ffmetadata_demuxer;
> > +extern AVOutputFormat ff_ffmetadata_muxer;
> > +extern AVOutputFormat ff_fifo_muxer;
> > +extern AVInputFormat  ff_filmstrip_demuxer;
> > +extern AVOutputFormat ff_filmstrip_muxer;
> > +extern AVInputFormat  ff_fits_demuxer;
> > +extern AVOutputFormat ff_fits_muxer;
> > +extern AVInputFormat  ff_flac_demuxer;
> > +extern AVOutputFormat ff_flac_muxer;
> > +extern AVInputFormat  ff_flic_demuxer;
> > +extern AVInputFormat  ff_flv_demuxer;
> > +extern AVOutputFormat ff_flv_muxer;
> > +extern AVInputFormat  ff_live_flv_demuxer;
> > +extern AVInputFormat  ff_fourxm_demuxer;
> > +extern AVOutputFormat ff_framecrc_muxer;
> > +extern AVOutputFormat ff_framehash_muxer;
> > +extern AVOutputFormat ff_framemd5_muxer;
> > +extern AVInputFormat  ff_frm_demuxer;
> > +extern AVInputFormat  ff_fsb_demuxer;
> > +extern AVInputFormat  ff_g722_demuxer;
> > +extern AVOutputFormat ff_g722_muxer;
> > +extern AVInputFormat  ff_g723_1_demuxer;
> > +extern AVOutputFormat ff_g723_1_muxer;
> > +extern AVInputFormat  ff_g726_demuxer;
> > +extern AVOutputFormat ff_g726_muxer;
> > +extern AVInputFormat  ff_g726le_demuxer;
> > +extern AVOutputFormat ff_g726le_muxer;
> > +extern AVInputFormat  ff_g729_demuxer;
> > +extern AVInputFormat  ff_gdv_demuxer;
> > +extern AVInputFormat  ff_genh_demuxer;
> > +extern AVInputFormat  ff_gif_demuxer;
> > +extern AVOutputFormat ff_gif_muxer;
> > +extern AVInputFormat  ff_gsm_demuxer;
> > +extern AVOutputFormat ff_gsm_muxer;
> > +extern AVInputFormat  ff_gxf_demuxer;
> > +extern AVOutputFormat ff_gxf_muxer;
> > +extern AVInputFormat  ff_h261_demuxer;
> > +extern AVOutputFormat ff_h261_muxer;
> > +extern AVInputFormat  ff_h263_demuxer;
> > +extern AVOutputFormat ff_h263_muxer;
> > +extern AVInputFormat  ff_h264_demuxer;
> > +extern AVOutputFormat ff_h264_muxer;
> > +extern AVOutputFormat ff_hash_muxer;
> > +extern AVOutputFormat ff_hds_muxer;
> > +extern AVInputFormat  ff_hevc_demuxer;
> > +extern AVOutputFormat ff_hevc_muxer;
> > +extern AVInputFormat  ff_hls_demuxer;
> > +extern AVOutputFormat ff_hls_muxer;
> > +extern AVInputFormat  ff_hnm_demuxer;
> > +extern AVInputFormat  ff_ico_demuxer;
> > +extern AVOutputFormat ff_ico_muxer;
> > +extern AVInputFormat  ff_idcin_demuxer;
> > +extern AVInputFormat  ff_idf_demuxer;
> > +extern AVInputFormat  ff_iff_demuxer;
> > +extern AVInputFormat  ff_ilbc_demuxer;
> > +extern AVOutputFormat ff_ilbc_muxer;
> > +extern AVInputFormat  ff_image2_demuxer;
> > +extern AVOutputFormat ff_image2_muxer;
> > +extern AVInputFormat  ff_image2pipe_demuxer;
> > +extern AVOutputFormat ff_image2pipe_muxer;
> > +extern AVInputFormat  ff_image2_alias_pix_demuxer;
> > +extern AVInputFormat  ff_image2_brender_pix_demuxer;
> > +extern AVInputFormat  ff_ingenient_demuxer;
> > +extern AVInputFormat  ff_ipmovie_demuxer;
> > +extern AVOutputFormat ff_ipod_muxer;
> > +extern AVInputFormat  ff_ircam_demuxer;
> > +extern AVOutputFormat ff_ircam_muxer;
> > +extern AVOutputFormat ff_ismv_muxer;
> > +extern AVInputFormat  ff_iss_demuxer;
> > +extern AVInputFormat  ff_iv8_demuxer;
> > +extern AVInputFormat  ff_ivf_demuxer;
> > +extern AVOutputFormat ff_ivf_muxer;
> > +extern AVInputFormat  ff_ivr_demuxer;
> > +extern AVInputFormat  ff_jacosub_demuxer;
> > +extern AVOutputFormat ff_jacosub_muxer;
> > +extern AVInputFormat  ff_jv_demuxer;
> > +extern AVOutputFormat ff_latm_muxer;
> > +extern AVInputFormat  ff_lmlm4_demuxer;
> > +extern AVInputFormat  ff_loas_demuxer;
> > +extern AVInputFormat  ff_lrc_demuxer;
> > +extern AVOutputFormat ff_lrc_muxer;
> > +extern AVInputFormat  ff_lvf_demuxer;
> > +extern AVInputFormat  ff_lxf_demuxer;
> > +extern AVInputFormat  ff_m4v_demuxer;
> > +extern AVOutputFormat ff_m4v_muxer;
> > +extern AVOutputFormat ff_md5_muxer;
> > +extern AVInputFormat  ff_matroska_demuxer;
> > +extern AVOutputFormat ff_matroska_muxer;
> > +extern AVOutputFormat ff_matroska_audio_muxer;
> > +extern AVInputFormat  ff_mgsts_demuxer;
> > +extern AVInputFormat  ff_microdvd_demuxer;
> > +extern AVOutputFormat ff_microdvd_muxer;
> > +extern AVInputFormat  ff_mjpeg_demuxer;
> > +extern AVOutputFormat ff_mjpeg_muxer;
> > +extern AVInputFormat  ff_mjpeg_2000_demuxer;
> > +extern AVInputFormat  ff_mlp_demuxer;
> > +extern AVOutputFormat ff_mlp_muxer;
> > +extern AVInputFormat  ff_mlv_demuxer;
> > +extern AVInputFormat  ff_mm_demuxer;
> > +extern AVInputFormat  ff_mmf_demuxer;
> > +extern AVOutputFormat ff_mmf_muxer;
> > +extern AVInputFormat  ff_mov_demuxer;
> > +extern AVOutputFormat ff_mov_muxer;
> > +extern AVOutputFormat ff_mp2_muxer;
> > +extern AVInputFormat  ff_mp3_demuxer;
> > +extern AVOutputFormat ff_mp3_muxer;
> > +extern AVOutputFormat ff_mp4_muxer;
> > +extern AVInputFormat  ff_mpc_demuxer;
> > +extern AVInputFormat  ff_mpc8_demuxer;
> > +extern AVOutputFormat ff_mpeg1system_muxer;
> > +extern AVOutputFormat ff_mpeg1vcd_muxer;
> > +extern AVOutputFormat ff_mpeg1video_muxer;
> > +extern AVOutputFormat ff_mpeg2dvd_muxer;
> > +extern AVOutputFormat ff_mpeg2svcd_muxer;
> > +extern AVOutputFormat ff_mpeg2video_muxer;
> > +extern AVOutputFormat ff_mpeg2vob_muxer;
> > +extern AVInputFormat  ff_mpegps_demuxer;
> > +extern AVInputFormat  ff_mpegts_demuxer;
> > +extern AVOutputFormat ff_mpegts_muxer;
> > +extern AVInputFormat  ff_mpegtsraw_demuxer;
> > +extern AVInputFormat  ff_mpegvideo_demuxer;
> > +extern AVInputFormat  ff_mpjpeg_demuxer;
> > +extern AVOutputFormat ff_mpjpeg_muxer;
> > +extern AVInputFormat  ff_mpl2_demuxer;
> > +extern AVInputFormat  ff_mpsub_demuxer;
> > +extern AVInputFormat  ff_msf_demuxer;
> > +extern AVInputFormat  ff_msnwc_tcp_demuxer;
> > +extern AVInputFormat  ff_mtaf_demuxer;
> > +extern AVInputFormat  ff_mtv_demuxer;
> > +extern AVInputFormat  ff_musx_demuxer;
> > +extern AVInputFormat  ff_mv_demuxer;
> > +extern AVInputFormat  ff_mvi_demuxer;
> > +extern AVInputFormat  ff_mxf_demuxer;
> > +extern AVOutputFormat ff_mxf_muxer;
> > +extern AVOutputFormat ff_mxf_d10_muxer;
> > +extern AVOutputFormat ff_mxf_opatom_muxer;
> > +extern AVInputFormat  ff_mxg_demuxer;
> > +extern AVInputFormat  ff_nc_demuxer;
> > +extern AVInputFormat  ff_nistsphere_demuxer;
> > +extern AVInputFormat  ff_nsp_demuxer;
> > +extern AVInputFormat  ff_nsv_demuxer;
> > +extern AVOutputFormat ff_null_muxer;
> > +extern AVInputFormat  ff_nut_demuxer;
> > +extern AVOutputFormat ff_nut_muxer;
> > +extern AVInputFormat  ff_nuv_demuxer;
> > +extern AVOutputFormat ff_oga_muxer;
> > +extern AVInputFormat  ff_ogg_demuxer;
> > +extern AVOutputFormat ff_ogg_muxer;
> > +extern AVOutputFormat ff_ogv_muxer;
> > +extern AVInputFormat  ff_oma_demuxer;
> > +extern AVOutputFormat ff_oma_muxer;
> > +extern AVOutputFormat ff_opus_muxer;
> > +extern AVInputFormat  ff_paf_demuxer;
> > +extern AVInputFormat  ff_pcm_alaw_demuxer;
> > +extern AVOutputFormat ff_pcm_alaw_muxer;
> > +extern AVInputFormat  ff_pcm_mulaw_demuxer;
> > +extern AVOutputFormat ff_pcm_mulaw_muxer;
> > +extern AVInputFormat  ff_pcm_f64be_demuxer;
> > +extern AVOutputFormat ff_pcm_f64be_muxer;
> > +extern AVInputFormat  ff_pcm_f64le_demuxer;
> > +extern AVOutputFormat ff_pcm_f64le_muxer;
> > +extern AVInputFormat  ff_pcm_f32be_demuxer;
> > +extern AVOutputFormat ff_pcm_f32be_muxer;
> > +extern AVInputFormat  ff_pcm_f32le_demuxer;
> > +extern AVOutputFormat ff_pcm_f32le_muxer;
> > +extern AVInputFormat  ff_pcm_s32be_demuxer;
> > +extern AVOutputFormat ff_pcm_s32be_muxer;
> > +extern AVInputFormat  ff_pcm_s32le_demuxer;
> > +extern AVOutputFormat ff_pcm_s32le_muxer;
> > +extern AVInputFormat  ff_pcm_s24be_demuxer;
> > +extern AVOutputFormat ff_pcm_s24be_muxer;
> > +extern AVInputFormat  ff_pcm_s24le_demuxer;
> > +extern AVOutputFormat ff_pcm_s24le_muxer;
> > +extern AVInputFormat  ff_pcm_s16be_demuxer;
> > +extern AVOutputFormat ff_pcm_s16be_muxer;
> > +extern AVInputFormat  ff_pcm_s16le_demuxer;
> > +extern AVOutputFormat ff_pcm_s16le_muxer;
> > +extern AVInputFormat  ff_pcm_s8_demuxer;
> > +extern AVOutputFormat ff_pcm_s8_muxer;
> > +extern AVInputFormat  ff_pcm_u32be_demuxer;
> > +extern AVOutputFormat ff_pcm_u32be_muxer;
> > +extern AVInputFormat  ff_pcm_u32le_demuxer;
> > +extern AVOutputFormat ff_pcm_u32le_muxer;
> > +extern AVInputFormat  ff_pcm_u24be_demuxer;
> > +extern AVOutputFormat ff_pcm_u24be_muxer;
> > +extern AVInputFormat  ff_pcm_u24le_demuxer;
> > +extern AVOutputFormat ff_pcm_u24le_muxer;
> > +extern AVInputFormat  ff_pcm_u16be_demuxer;
> > +extern AVOutputFormat ff_pcm_u16be_muxer;
> > +extern AVInputFormat  ff_pcm_u16le_demuxer;
> > +extern AVOutputFormat ff_pcm_u16le_muxer;
> > +extern AVInputFormat  ff_pcm_u8_demuxer;
> > +extern AVOutputFormat ff_pcm_u8_muxer;
> > +extern AVInputFormat  ff_pjs_demuxer;
> > +extern AVInputFormat  ff_pmp_demuxer;
> > +extern AVOutputFormat ff_psp_muxer;
> > +extern AVInputFormat  ff_pva_demuxer;
> > +extern AVInputFormat  ff_pvf_demuxer;
> > +extern AVInputFormat  ff_qcp_demuxer;
> > +extern AVInputFormat  ff_r3d_demuxer;
> > +extern AVInputFormat  ff_rawvideo_demuxer;
> > +extern AVOutputFormat ff_rawvideo_muxer;
> > +extern AVInputFormat  ff_realtext_demuxer;
> > +extern AVInputFormat  ff_redspark_demuxer;
> > +extern AVInputFormat  ff_rl2_demuxer;
> > +extern AVInputFormat  ff_rm_demuxer;
> > +extern AVOutputFormat ff_rm_muxer;
> > +extern AVInputFormat  ff_roq_demuxer;
> > +extern AVOutputFormat ff_roq_muxer;
> > +extern AVInputFormat  ff_rpl_demuxer;
> > +extern AVInputFormat  ff_rsd_demuxer;
> > +extern AVInputFormat  ff_rso_demuxer;
> > +extern AVOutputFormat ff_rso_muxer;
> > +extern AVInputFormat  ff_rtp_demuxer;
> > +extern AVOutputFormat ff_rtp_muxer;
> > +extern AVOutputFormat ff_rtp_mpegts_muxer;
> > +extern AVInputFormat  ff_rtsp_demuxer;
> > +extern AVOutputFormat ff_rtsp_muxer;
> > +extern AVInputFormat  ff_s337m_demuxer;
> > +extern AVInputFormat  ff_sami_demuxer;
> > +extern AVInputFormat  ff_sap_demuxer;
> > +extern AVOutputFormat ff_sap_muxer;
> > +extern AVInputFormat  ff_sbg_demuxer;
> > +extern AVInputFormat  ff_scc_demuxer;
> > +extern AVOutputFormat ff_scc_muxer;
> > +extern AVInputFormat  ff_sdp_demuxer;
> > +extern AVInputFormat  ff_sdr2_demuxer;
> > +extern AVInputFormat  ff_sds_demuxer;
> > +extern AVInputFormat  ff_sdx_demuxer;
> > +extern AVInputFormat  ff_segafilm_demuxer;
> > +extern AVOutputFormat ff_segment_muxer;
> > +extern AVOutputFormat ff_stream_segment_muxer;
> > +extern AVInputFormat  ff_shorten_demuxer;
> > +extern AVInputFormat  ff_siff_demuxer;
> > +extern AVOutputFormat ff_singlejpeg_muxer;
> > +extern AVInputFormat  ff_sln_demuxer;
> > +extern AVInputFormat  ff_smacker_demuxer;
> > +extern AVInputFormat  ff_smjpeg_demuxer;
> > +extern AVOutputFormat ff_smjpeg_muxer;
> > +extern AVOutputFormat ff_smoothstreaming_muxer;
> > +extern AVInputFormat  ff_smush_demuxer;
> > +extern AVInputFormat  ff_sol_demuxer;
> > +extern AVInputFormat  ff_sox_demuxer;
> > +extern AVOutputFormat ff_sox_muxer;
> > +extern AVOutputFormat ff_spx_muxer;
> > +extern AVInputFormat  ff_spdif_demuxer;
> > +extern AVOutputFormat ff_spdif_muxer;
> > +extern AVInputFormat  ff_srt_demuxer;
> > +extern AVOutputFormat ff_srt_muxer;
> > +extern AVInputFormat  ff_str_demuxer;
> > +extern AVInputFormat  ff_stl_demuxer;
> > +extern AVInputFormat  ff_subviewer1_demuxer;
> > +extern AVInputFormat  ff_subviewer_demuxer;
> > +extern AVInputFormat  ff_sup_demuxer;
> > +extern AVOutputFormat ff_sup_muxer;
> > +extern AVInputFormat  ff_svag_demuxer;
> > +extern AVInputFormat  ff_swf_demuxer;
> > +extern AVOutputFormat ff_swf_muxer;
> > +extern AVInputFormat  ff_tak_demuxer;
> > +extern AVOutputFormat ff_tee_muxer;
> > +extern AVInputFormat  ff_tedcaptions_demuxer;
> > +extern AVOutputFormat ff_tg2_muxer;
> > +extern AVOutputFormat ff_tgp_muxer;
> > +extern AVInputFormat  ff_thp_demuxer;
> > +extern AVInputFormat  ff_threedostr_demuxer;
> > +extern AVInputFormat  ff_tiertexseq_demuxer;
> > +extern AVOutputFormat ff_mkvtimestamp_v2_muxer;
> > +extern AVInputFormat  ff_tmv_demuxer;
> > +extern AVInputFormat  ff_truehd_demuxer;
> > +extern AVOutputFormat ff_truehd_muxer;
> > +extern AVInputFormat  ff_tta_demuxer;
> > +extern AVOutputFormat ff_tta_muxer;
> > +extern AVInputFormat  ff_txd_demuxer;
> > +extern AVInputFormat  ff_tty_demuxer;
> > +extern AVInputFormat  ff_ty_demuxer;
> > +extern AVOutputFormat ff_uncodedframecrc_muxer;
> > +extern AVInputFormat  ff_v210_demuxer;
> > +extern AVInputFormat  ff_v210x_demuxer;
> > +extern AVInputFormat  ff_vag_demuxer;
> > +extern AVInputFormat  ff_vc1_demuxer;
> > +extern AVOutputFormat ff_vc1_muxer;
> > +extern AVInputFormat  ff_vc1t_demuxer;
> > +extern AVOutputFormat ff_vc1t_muxer;
> > +extern AVInputFormat  ff_vivo_demuxer;
> > +extern AVInputFormat  ff_vmd_demuxer;
> > +extern AVInputFormat  ff_vobsub_demuxer;
> > +extern AVInputFormat  ff_voc_demuxer;
> > +extern AVOutputFormat ff_voc_muxer;
> > +extern AVInputFormat  ff_vpk_demuxer;
> > +extern AVInputFormat  ff_vplayer_demuxer;
> > +extern AVInputFormat  ff_vqf_demuxer;
> > +extern AVInputFormat  ff_w64_demuxer;
> > +extern AVOutputFormat ff_w64_muxer;
> > +extern AVInputFormat  ff_wav_demuxer;
> > +extern AVOutputFormat ff_wav_muxer;
> > +extern AVInputFormat  ff_wc3_demuxer;
> > +extern AVOutputFormat ff_webm_muxer;
> > +extern AVInputFormat  ff_webm_dash_manifest_demuxer;
> > +extern AVOutputFormat ff_webm_dash_manifest_muxer;
> > +extern AVOutputFormat ff_webm_chunk_muxer;
> > +extern AVOutputFormat ff_webp_muxer;
> > +extern AVInputFormat  ff_webvtt_demuxer;
> > +extern AVOutputFormat ff_webvtt_muxer;
> > +extern AVInputFormat  ff_wsaud_demuxer;
> > +extern AVInputFormat  ff_wsd_demuxer;
> > +extern AVInputFormat  ff_wsvqa_demuxer;
> > +extern AVInputFormat  ff_wtv_demuxer;
> > +extern AVOutputFormat ff_wtv_muxer;
> > +extern AVInputFormat  ff_wve_demuxer;
> > +extern AVInputFormat  ff_wv_demuxer;
> > +extern AVOutputFormat ff_wv_muxer;
> > +extern AVInputFormat  ff_xa_demuxer;
> > +extern AVInputFormat  ff_xbin_demuxer;
> > +extern AVInputFormat  ff_xmv_demuxer;
> > +extern AVInputFormat  ff_xvag_demuxer;
> > +extern AVInputFormat  ff_xwma_demuxer;
> > +extern AVInputFormat  ff_yop_demuxer;
> > +extern AVInputFormat  ff_yuv4mpegpipe_demuxer;
> > +extern AVOutputFormat ff_yuv4mpegpipe_muxer;
> > +/* image demuxers */
> > +extern AVInputFormat  ff_image_bmp_pipe_demuxer;
> > +extern AVInputFormat  ff_image_dds_pipe_demuxer;
> > +extern AVInputFormat  ff_image_dpx_pipe_demuxer;
> > +extern AVInputFormat  ff_image_exr_pipe_demuxer;
> > +extern AVInputFormat  ff_image_j2k_pipe_demuxer;
> > +extern AVInputFormat  ff_image_jpeg_pipe_demuxer;
> > +extern AVInputFormat  ff_image_jpegls_pipe_demuxer;
> > +extern AVInputFormat  ff_image_pam_pipe_demuxer;
> > +extern AVInputFormat  ff_image_pbm_pipe_demuxer;
> > +extern AVInputFormat  ff_image_pcx_pipe_demuxer;
> > +extern AVInputFormat  ff_image_pgmyuv_pipe_demuxer;
> > +extern AVInputFormat  ff_image_pgm_pipe_demuxer;
> > +extern AVInputFormat  ff_image_pictor_pipe_demuxer;
> > +extern AVInputFormat  ff_image_png_pipe_demuxer;
> > +extern AVInputFormat  ff_image_ppm_pipe_demuxer;
> > +extern AVInputFormat  ff_image_psd_pipe_demuxer;
> > +extern AVInputFormat  ff_image_qdraw_pipe_demuxer;
> > +extern AVInputFormat  ff_image_sgi_pipe_demuxer;
> > +extern AVInputFormat  ff_image_svg_pipe_demuxer;
> > +extern AVInputFormat  ff_image_sunrast_pipe_demuxer;
> > +extern AVInputFormat  ff_image_tiff_pipe_demuxer;
> > +extern AVInputFormat  ff_image_webp_pipe_demuxer;
> > +extern AVInputFormat  ff_image_xpm_pipe_demuxer;
> >
> > -#define REGISTER_DEMUXER(X, x)
> \
> > -    {
>  \
> > -        extern AVInputFormat ff_##x##_demuxer;
> \
> > -        if (CONFIG_##X##_DEMUXER)
>  \
> > -            av_register_input_format(&ff_##x##_demuxer);
>   \
> > -    }
> > +/* external libraries */
> > +extern AVOutputFormat ff_chromaprint_muxer;
> > +extern AVInputFormat  ff_libgme_demuxer;
> > +extern AVInputFormat  ff_libmodplug_demuxer;
> > +extern AVInputFormat  ff_libopenmpt_demuxer;
> >
> > -#define REGISTER_MUXDEMUX(X, x) REGISTER_MUXER(X, x);
> REGISTER_DEMUXER(X, x)
> > +#include "libavformat/muxer_list.c"
> > +#include "libavformat/demuxer_list.c"
> >
> > -static void register_all(void)
> > +const AVOutputFormat *av_muxer_iterate(void **opaque)
> >  {
> > -    avcodec_register_all();
> > +    uintptr_t i = (uintptr_t)*opaque;
> > +    const AVOutputFormat *f = muxer_list[i];
> > +    if (f)
> > +        *opaque = (void*)(i + 1);
> > +    return f;
> > +}
> >
> > -    /* (de)muxers */
> > -    REGISTER_MUXER   (A64,              a64);
> > -    REGISTER_DEMUXER (AA,               aa);
> > -    REGISTER_DEMUXER (AAC,              aac);
> > -    REGISTER_MUXDEMUX(AC3,              ac3);
> > -    REGISTER_DEMUXER (ACM,              acm);
> > -    REGISTER_DEMUXER (ACT,              act);
> > -    REGISTER_DEMUXER (ADF,              adf);
> > -    REGISTER_DEMUXER (ADP,              adp);
> > -    REGISTER_DEMUXER (ADS,              ads);
> > -    REGISTER_MUXER   (ADTS,             adts);
> > -    REGISTER_MUXDEMUX(ADX,              adx);
> > -    REGISTER_DEMUXER (AEA,              aea);
> > -    REGISTER_DEMUXER (AFC,              afc);
> > -    REGISTER_MUXDEMUX(AIFF,             aiff);
> > -    REGISTER_DEMUXER (AIX,              aix);
> > -    REGISTER_MUXDEMUX(AMR,              amr);
> > -    REGISTER_DEMUXER (AMRNB,            amrnb);
> > -    REGISTER_DEMUXER (AMRWB,            amrwb);
> > -    REGISTER_DEMUXER (ANM,              anm);
> > -    REGISTER_DEMUXER (APC,              apc);
> > -    REGISTER_DEMUXER (APE,              ape);
> > -    REGISTER_MUXDEMUX(APNG,             apng);
> > -    REGISTER_MUXDEMUX(APTX,             aptx);
> > -    REGISTER_DEMUXER (AQTITLE,          aqtitle);
> > -    REGISTER_MUXDEMUX(ASF,              asf);
> > -    REGISTER_DEMUXER (ASF_O,            asf_o);
> > -    REGISTER_MUXDEMUX(ASS,              ass);
> > -    REGISTER_MUXDEMUX(AST,              ast);
> > -    REGISTER_MUXER   (ASF_STREAM,       asf_stream);
> > -    REGISTER_MUXDEMUX(AU,               au);
> > -    REGISTER_MUXDEMUX(AVI,              avi);
> > -    REGISTER_DEMUXER (AVISYNTH,         avisynth);
> > -    REGISTER_MUXER   (AVM2,             avm2);
> > -    REGISTER_DEMUXER (AVR,              avr);
> > -    REGISTER_DEMUXER (AVS,              avs);
> > -    REGISTER_DEMUXER (BETHSOFTVID,      bethsoftvid);
> > -    REGISTER_DEMUXER (BFI,              bfi);
> > -    REGISTER_DEMUXER (BINTEXT,          bintext);
> > -    REGISTER_DEMUXER (BINK,             bink);
> > -    REGISTER_MUXDEMUX(BIT,              bit);
> > -    REGISTER_DEMUXER (BMV,              bmv);
> > -    REGISTER_DEMUXER (BFSTM,            bfstm);
> > -    REGISTER_DEMUXER (BRSTM,            brstm);
> > -    REGISTER_DEMUXER (BOA,              boa);
> > -    REGISTER_DEMUXER (C93,              c93);
> > -    REGISTER_MUXDEMUX(CAF,              caf);
> > -    REGISTER_MUXDEMUX(CAVSVIDEO,        cavsvideo);
> > -    REGISTER_DEMUXER (CDG,              cdg);
> > -    REGISTER_DEMUXER (CDXL,             cdxl);
> > -    REGISTER_DEMUXER (CINE,             cine);
> > -    REGISTER_DEMUXER (CONCAT,           concat);
> > -    REGISTER_MUXER   (CRC,              crc);
> > -    REGISTER_MUXDEMUX(DASH,             dash);
> > -    REGISTER_MUXDEMUX(DATA,             data);
> > -    REGISTER_MUXDEMUX(DAUD,             daud);
> > -    REGISTER_DEMUXER (DCSTR,            dcstr);
> > -    REGISTER_DEMUXER (DFA,              dfa);
> > -    REGISTER_MUXDEMUX(DIRAC,            dirac);
> > -    REGISTER_MUXDEMUX(DNXHD,            dnxhd);
> > -    REGISTER_DEMUXER (DSF,              dsf);
> > -    REGISTER_DEMUXER (DSICIN,           dsicin);
> > -    REGISTER_DEMUXER (DSS,              dss);
> > -    REGISTER_MUXDEMUX(DTS,              dts);
> > -    REGISTER_DEMUXER (DTSHD,            dtshd);
> > -    REGISTER_MUXDEMUX(DV,               dv);
> > -    REGISTER_DEMUXER (DVBSUB,           dvbsub);
> > -    REGISTER_DEMUXER (DVBTXT,           dvbtxt);
> > -    REGISTER_DEMUXER (DXA,              dxa);
> > -    REGISTER_DEMUXER (EA,               ea);
> > -    REGISTER_DEMUXER (EA_CDATA,         ea_cdata);
> > -    REGISTER_MUXDEMUX(EAC3,             eac3);
> > -    REGISTER_DEMUXER (EPAF,             epaf);
> > -    REGISTER_MUXER   (F4V,              f4v);
> > -    REGISTER_MUXDEMUX(FFMETADATA,       ffmetadata);
> > -    REGISTER_MUXER   (FIFO,             fifo);
> > -    REGISTER_MUXDEMUX(FILMSTRIP,        filmstrip);
> > -    REGISTER_MUXDEMUX(FITS,             fits);
> > -    REGISTER_MUXDEMUX(FLAC,             flac);
> > -    REGISTER_DEMUXER (FLIC,             flic);
> > -    REGISTER_MUXDEMUX(FLV,              flv);
> > -    REGISTER_DEMUXER (LIVE_FLV,         live_flv);
> > -    REGISTER_DEMUXER (FOURXM,           fourxm);
> > -    REGISTER_MUXER   (FRAMECRC,         framecrc);
> > -    REGISTER_MUXER   (FRAMEHASH,        framehash);
> > -    REGISTER_MUXER   (FRAMEMD5,         framemd5);
> > -    REGISTER_DEMUXER (FRM,              frm);
> > -    REGISTER_DEMUXER (FSB,              fsb);
> > -    REGISTER_MUXDEMUX(G722,             g722);
> > -    REGISTER_MUXDEMUX(G723_1,           g723_1);
> > -    REGISTER_MUXDEMUX(G726,             g726);
> > -    REGISTER_MUXDEMUX(G726LE,           g726le);
> > -    REGISTER_DEMUXER (G729,             g729);
> > -    REGISTER_DEMUXER (GDV,              gdv);
> > -    REGISTER_DEMUXER (GENH,             genh);
> > -    REGISTER_MUXDEMUX(GIF,              gif);
> > -    REGISTER_MUXDEMUX(GSM,              gsm);
> > -    REGISTER_MUXDEMUX(GXF,              gxf);
> > -    REGISTER_MUXDEMUX(H261,             h261);
> > -    REGISTER_MUXDEMUX(H263,             h263);
> > -    REGISTER_MUXDEMUX(H264,             h264);
> > -    REGISTER_MUXER   (HASH,             hash);
> > -    REGISTER_MUXER   (HDS,              hds);
> > -    REGISTER_MUXDEMUX(HEVC,             hevc);
> > -    REGISTER_MUXDEMUX(HLS,              hls);
> > -    REGISTER_DEMUXER (HNM,              hnm);
> > -    REGISTER_MUXDEMUX(ICO,              ico);
> > -    REGISTER_DEMUXER (IDCIN,            idcin);
> > -    REGISTER_DEMUXER (IDF,              idf);
> > -    REGISTER_DEMUXER (IFF,              iff);
> > -    REGISTER_MUXDEMUX(ILBC,             ilbc);
> > -    REGISTER_MUXDEMUX(IMAGE2,           image2);
> > -    REGISTER_MUXDEMUX(IMAGE2PIPE,       image2pipe);
> > -    REGISTER_DEMUXER (IMAGE2_ALIAS_PIX, image2_alias_pix);
> > -    REGISTER_DEMUXER (IMAGE2_BRENDER_PIX, image2_brender_pix);
> > -    REGISTER_DEMUXER (INGENIENT,        ingenient);
> > -    REGISTER_DEMUXER (IPMOVIE,          ipmovie);
> > -    REGISTER_MUXER   (IPOD,             ipod);
> > -    REGISTER_MUXDEMUX(IRCAM,            ircam);
> > -    REGISTER_MUXER   (ISMV,             ismv);
> > -    REGISTER_DEMUXER (ISS,              iss);
> > -    REGISTER_DEMUXER (IV8,              iv8);
> > -    REGISTER_MUXDEMUX(IVF,              ivf);
> > -    REGISTER_DEMUXER (IVR,              ivr);
> > -    REGISTER_MUXDEMUX(JACOSUB,          jacosub);
> > -    REGISTER_DEMUXER (JV,               jv);
> > -    REGISTER_MUXER   (LATM,             latm);
> > -    REGISTER_DEMUXER (LMLM4,            lmlm4);
> > -    REGISTER_DEMUXER (LOAS,             loas);
> > -    REGISTER_MUXDEMUX(LRC,              lrc);
> > -    REGISTER_DEMUXER (LVF,              lvf);
> > -    REGISTER_DEMUXER (LXF,              lxf);
> > -    REGISTER_MUXDEMUX(M4V,              m4v);
> > -    REGISTER_MUXER   (MD5,              md5);
> > -    REGISTER_MUXDEMUX(MATROSKA,         matroska);
> > -    REGISTER_MUXER   (MATROSKA_AUDIO,   matroska_audio);
> > -    REGISTER_DEMUXER (MGSTS,            mgsts);
> > -    REGISTER_MUXDEMUX(MICRODVD,         microdvd);
> > -    REGISTER_MUXDEMUX(MJPEG,            mjpeg);
> > -    REGISTER_DEMUXER (MJPEG_2000,       mjpeg_2000);
> > -    REGISTER_MUXDEMUX(MLP,              mlp);
> > -    REGISTER_DEMUXER (MLV,              mlv);
> > -    REGISTER_DEMUXER (MM,               mm);
> > -    REGISTER_MUXDEMUX(MMF,              mmf);
> > -    REGISTER_MUXDEMUX(MOV,              mov);
> > -    REGISTER_MUXER   (MP2,              mp2);
> > -    REGISTER_MUXDEMUX(MP3,              mp3);
> > -    REGISTER_MUXER   (MP4,              mp4);
> > -    REGISTER_DEMUXER (MPC,              mpc);
> > -    REGISTER_DEMUXER (MPC8,             mpc8);
> > -    REGISTER_MUXER   (MPEG1SYSTEM,      mpeg1system);
> > -    REGISTER_MUXER   (MPEG1VCD,         mpeg1vcd);
> > -    REGISTER_MUXER   (MPEG1VIDEO,       mpeg1video);
> > -    REGISTER_MUXER   (MPEG2DVD,         mpeg2dvd);
> > -    REGISTER_MUXER   (MPEG2SVCD,        mpeg2svcd);
> > -    REGISTER_MUXER   (MPEG2VIDEO,       mpeg2video);
> > -    REGISTER_MUXER   (MPEG2VOB,         mpeg2vob);
> > -    REGISTER_DEMUXER (MPEGPS,           mpegps);
> > -    REGISTER_MUXDEMUX(MPEGTS,           mpegts);
> > -    REGISTER_DEMUXER (MPEGTSRAW,        mpegtsraw);
> > -    REGISTER_DEMUXER (MPEGVIDEO,        mpegvideo);
> > -    REGISTER_MUXDEMUX(MPJPEG,           mpjpeg);
> > -    REGISTER_DEMUXER (MPL2,             mpl2);
> > -    REGISTER_DEMUXER (MPSUB,            mpsub);
> > -    REGISTER_DEMUXER (MSF,              msf);
> > -    REGISTER_DEMUXER (MSNWC_TCP,        msnwc_tcp);
> > -    REGISTER_DEMUXER (MTAF,             mtaf);
> > -    REGISTER_DEMUXER (MTV,              mtv);
> > -    REGISTER_DEMUXER (MUSX,             musx);
> > -    REGISTER_DEMUXER (MV,               mv);
> > -    REGISTER_DEMUXER (MVI,              mvi);
> > -    REGISTER_MUXDEMUX(MXF,              mxf);
> > -    REGISTER_MUXER   (MXF_D10,          mxf_d10);
> > -    REGISTER_MUXER   (MXF_OPATOM,       mxf_opatom);
> > -    REGISTER_DEMUXER (MXG,              mxg);
> > -    REGISTER_DEMUXER (NC,               nc);
> > -    REGISTER_DEMUXER (NISTSPHERE,       nistsphere);
> > -    REGISTER_DEMUXER (NSP,              nsp);
> > -    REGISTER_DEMUXER (NSV,              nsv);
> > -    REGISTER_MUXER   (NULL,             null);
> > -    REGISTER_MUXDEMUX(NUT,              nut);
> > -    REGISTER_DEMUXER (NUV,              nuv);
> > -    REGISTER_MUXER   (OGA,              oga);
> > -    REGISTER_MUXDEMUX(OGG,              ogg);
> > -    REGISTER_MUXER   (OGV,              ogv);
> > -    REGISTER_MUXDEMUX(OMA,              oma);
> > -    REGISTER_MUXER   (OPUS,             opus);
> > -    REGISTER_DEMUXER (PAF,              paf);
> > -    REGISTER_MUXDEMUX(PCM_ALAW,         pcm_alaw);
> > -    REGISTER_MUXDEMUX(PCM_MULAW,        pcm_mulaw);
> > -    REGISTER_MUXDEMUX(PCM_F64BE,        pcm_f64be);
> > -    REGISTER_MUXDEMUX(PCM_F64LE,        pcm_f64le);
> > -    REGISTER_MUXDEMUX(PCM_F32BE,        pcm_f32be);
> > -    REGISTER_MUXDEMUX(PCM_F32LE,        pcm_f32le);
> > -    REGISTER_MUXDEMUX(PCM_S32BE,        pcm_s32be);
> > -    REGISTER_MUXDEMUX(PCM_S32LE,        pcm_s32le);
> > -    REGISTER_MUXDEMUX(PCM_S24BE,        pcm_s24be);
> > -    REGISTER_MUXDEMUX(PCM_S24LE,        pcm_s24le);
> > -    REGISTER_MUXDEMUX(PCM_S16BE,        pcm_s16be);
> > -    REGISTER_MUXDEMUX(PCM_S16LE,        pcm_s16le);
> > -    REGISTER_MUXDEMUX(PCM_S8,           pcm_s8);
> > -    REGISTER_MUXDEMUX(PCM_U32BE,        pcm_u32be);
> > -    REGISTER_MUXDEMUX(PCM_U32LE,        pcm_u32le);
> > -    REGISTER_MUXDEMUX(PCM_U24BE,        pcm_u24be);
> > -    REGISTER_MUXDEMUX(PCM_U24LE,        pcm_u24le);
> > -    REGISTER_MUXDEMUX(PCM_U16BE,        pcm_u16be);
> > -    REGISTER_MUXDEMUX(PCM_U16LE,        pcm_u16le);
> > -    REGISTER_MUXDEMUX(PCM_U8,           pcm_u8);
> > -    REGISTER_DEMUXER (PJS,              pjs);
> > -    REGISTER_DEMUXER (PMP,              pmp);
> > -    REGISTER_MUXER   (PSP,              psp);
> > -    REGISTER_DEMUXER (PVA,              pva);
> > -    REGISTER_DEMUXER (PVF,              pvf);
> > -    REGISTER_DEMUXER (QCP,              qcp);
> > -    REGISTER_DEMUXER (R3D,              r3d);
> > -    REGISTER_MUXDEMUX(RAWVIDEO,         rawvideo);
> > -    REGISTER_DEMUXER (REALTEXT,         realtext);
> > -    REGISTER_DEMUXER (REDSPARK,         redspark);
> > -    REGISTER_DEMUXER (RL2,              rl2);
> > -    REGISTER_MUXDEMUX(RM,               rm);
> > -    REGISTER_MUXDEMUX(ROQ,              roq);
> > -    REGISTER_DEMUXER (RPL,              rpl);
> > -    REGISTER_DEMUXER (RSD,              rsd);
> > -    REGISTER_MUXDEMUX(RSO,              rso);
> > -    REGISTER_MUXDEMUX(RTP,              rtp);
> > -    REGISTER_MUXER   (RTP_MPEGTS,       rtp_mpegts);
> > -    REGISTER_MUXDEMUX(RTSP,             rtsp);
> > -    REGISTER_DEMUXER (S337M,            s337m);
> > -    REGISTER_DEMUXER (SAMI,             sami);
> > -    REGISTER_MUXDEMUX(SAP,              sap);
> > -    REGISTER_DEMUXER (SBG,              sbg);
> > -    REGISTER_MUXDEMUX(SCC,              scc);
> > -    REGISTER_DEMUXER (SDP,              sdp);
> > -    REGISTER_DEMUXER (SDR2,             sdr2);
> > -    REGISTER_DEMUXER (SDS,              sds);
> > -    REGISTER_DEMUXER (SDX,              sdx);
> > -    REGISTER_DEMUXER (SEGAFILM,         segafilm);
> > -    REGISTER_MUXER   (SEGMENT,          segment);
> > -    REGISTER_MUXER   (SEGMENT,          stream_segment);
> > -    REGISTER_DEMUXER (SHORTEN,          shorten);
> > -    REGISTER_DEMUXER (SIFF,             siff);
> > -    REGISTER_MUXER   (SINGLEJPEG,       singlejpeg);
> > -    REGISTER_DEMUXER (SLN,              sln);
> > -    REGISTER_DEMUXER (SMACKER,          smacker);
> > -    REGISTER_MUXDEMUX(SMJPEG,           smjpeg);
> > -    REGISTER_MUXER   (SMOOTHSTREAMING,  smoothstreaming);
> > -    REGISTER_DEMUXER (SMUSH,            smush);
> > -    REGISTER_DEMUXER (SOL,              sol);
> > -    REGISTER_MUXDEMUX(SOX,              sox);
> > -    REGISTER_MUXER   (SPX,              spx);
> > -    REGISTER_MUXDEMUX(SPDIF,            spdif);
> > -    REGISTER_MUXDEMUX(SRT,              srt);
> > -    REGISTER_DEMUXER (STR,              str);
> > -    REGISTER_DEMUXER (STL,              stl);
> > -    REGISTER_DEMUXER (SUBVIEWER1,       subviewer1);
> > -    REGISTER_DEMUXER (SUBVIEWER,        subviewer);
> > -    REGISTER_MUXDEMUX(SUP,              sup);
> > -    REGISTER_DEMUXER (SVAG,             svag);
> > -    REGISTER_MUXDEMUX(SWF,              swf);
> > -    REGISTER_DEMUXER (TAK,              tak);
> > -    REGISTER_MUXER   (TEE,              tee);
> > -    REGISTER_DEMUXER (TEDCAPTIONS,      tedcaptions);
> > -    REGISTER_MUXER   (TG2,              tg2);
> > -    REGISTER_MUXER   (TGP,              tgp);
> > -    REGISTER_DEMUXER (THP,              thp);
> > -    REGISTER_DEMUXER (THREEDOSTR,       threedostr);
> > -    REGISTER_DEMUXER (TIERTEXSEQ,       tiertexseq);
> > -    REGISTER_MUXER   (MKVTIMESTAMP_V2,  mkvtimestamp_v2);
> > -    REGISTER_DEMUXER (TMV,              tmv);
> > -    REGISTER_MUXDEMUX(TRUEHD,           truehd);
> > -    REGISTER_MUXDEMUX(TTA,              tta);
> > -    REGISTER_DEMUXER (TXD,              txd);
> > -    REGISTER_DEMUXER (TTY,              tty);
> > -    REGISTER_DEMUXER (TY,               ty);
> > -    REGISTER_MUXER   (UNCODEDFRAMECRC,  uncodedframecrc);
> > -    REGISTER_DEMUXER (V210,             v210);
> > -    REGISTER_DEMUXER (V210X,            v210x);
> > -    REGISTER_DEMUXER (VAG,              vag);
> > -    REGISTER_MUXDEMUX(VC1,              vc1);
> > -    REGISTER_MUXDEMUX(VC1T,             vc1t);
> > -    REGISTER_DEMUXER (VIVO,             vivo);
> > -    REGISTER_DEMUXER (VMD,              vmd);
> > -    REGISTER_DEMUXER (VOBSUB,           vobsub);
> > -    REGISTER_MUXDEMUX(VOC,              voc);
> > -    REGISTER_DEMUXER (VPK,              vpk);
> > -    REGISTER_DEMUXER (VPLAYER,          vplayer);
> > -    REGISTER_DEMUXER (VQF,              vqf);
> > -    REGISTER_MUXDEMUX(W64,              w64);
> > -    REGISTER_MUXDEMUX(WAV,              wav);
> > -    REGISTER_DEMUXER (WC3,              wc3);
> > -    REGISTER_MUXER   (WEBM,             webm);
> > -    REGISTER_MUXDEMUX(WEBM_DASH_MANIFEST, webm_dash_manifest);
> > -    REGISTER_MUXER   (WEBM_CHUNK,       webm_chunk);
> > -    REGISTER_MUXER   (WEBP,             webp);
> > -    REGISTER_MUXDEMUX(WEBVTT,           webvtt);
> > -    REGISTER_DEMUXER (WSAUD,            wsaud);
> > -    REGISTER_DEMUXER (WSD,              wsd);
> > -    REGISTER_DEMUXER (WSVQA,            wsvqa);
> > -    REGISTER_MUXDEMUX(WTV,              wtv);
> > -    REGISTER_DEMUXER (WVE,              wve);
> > -    REGISTER_MUXDEMUX(WV,               wv);
> > -    REGISTER_DEMUXER (XA,               xa);
> > -    REGISTER_DEMUXER (XBIN,             xbin);
> > -    REGISTER_DEMUXER (XMV,              xmv);
> > -    REGISTER_DEMUXER (XVAG,             xvag);
> > -    REGISTER_DEMUXER (XWMA,             xwma);
> > -    REGISTER_DEMUXER (YOP,              yop);
> > -    REGISTER_MUXDEMUX(YUV4MPEGPIPE,     yuv4mpegpipe);
> > +const AVInputFormat *av_demuxer_iterate(void **opaque){
> > +    uintptr_t i = (uintptr_t)*opaque;
> > +    const AVInputFormat *f = demuxer_list[i];
> >
> > -    /* image demuxers */
> > -    REGISTER_DEMUXER (IMAGE_BMP_PIPE,        image_bmp_pipe);
> > -    REGISTER_DEMUXER (IMAGE_DDS_PIPE,        image_dds_pipe);
> > -    REGISTER_DEMUXER (IMAGE_DPX_PIPE,        image_dpx_pipe);
> > -    REGISTER_DEMUXER (IMAGE_EXR_PIPE,        image_exr_pipe);
> > -    REGISTER_DEMUXER (IMAGE_J2K_PIPE,        image_j2k_pipe);
> > -    REGISTER_DEMUXER (IMAGE_JPEG_PIPE,       image_jpeg_pipe);
> > -    REGISTER_DEMUXER (IMAGE_JPEGLS_PIPE,     image_jpegls_pipe);
> > -    REGISTER_DEMUXER (IMAGE_PAM_PIPE,        image_pam_pipe);
> > -    REGISTER_DEMUXER (IMAGE_PBM_PIPE,        image_pbm_pipe);
> > -    REGISTER_DEMUXER (IMAGE_PCX_PIPE,        image_pcx_pipe);
> > -    REGISTER_DEMUXER (IMAGE_PGMYUV_PIPE,     image_pgmyuv_pipe);
> > -    REGISTER_DEMUXER (IMAGE_PGM_PIPE,        image_pgm_pipe);
> > -    REGISTER_DEMUXER (IMAGE_PICTOR_PIPE,     image_pictor_pipe);
> > -    REGISTER_DEMUXER (IMAGE_PNG_PIPE,        image_png_pipe);
> > -    REGISTER_DEMUXER (IMAGE_PPM_PIPE,        image_ppm_pipe);
> > -    REGISTER_DEMUXER (IMAGE_PSD_PIPE,        image_psd_pipe);
> > -    REGISTER_DEMUXER (IMAGE_QDRAW_PIPE,      image_qdraw_pipe);
> > -    REGISTER_DEMUXER (IMAGE_SGI_PIPE,        image_sgi_pipe);
> > -    REGISTER_DEMUXER (IMAGE_SVG_PIPE,        image_svg_pipe);
> > -    REGISTER_DEMUXER (IMAGE_SUNRAST_PIPE,    image_sunrast_pipe);
> > -    REGISTER_DEMUXER (IMAGE_TIFF_PIPE,       image_tiff_pipe);
> > -    REGISTER_DEMUXER (IMAGE_WEBP_PIPE,       image_webp_pipe);
> > -    REGISTER_DEMUXER (IMAGE_XPM_PIPE,        image_xpm_pipe);
> > +    if (f)
> > +        *opaque = (void*)(i + 1);
> > +    return f;
> > +}
> > +
> > +#if FF_API_NEXT
> > +FF_DISABLE_DEPRECATION_WARNINGS
> > +static AVOnce av_format_next_init = AV_ONCE_INIT;
> >
> > -    /* external libraries */
> > -    REGISTER_MUXER   (CHROMAPRINT,      chromaprint);
> > -    REGISTER_DEMUXER (LIBGME,           libgme);
> > -    REGISTER_DEMUXER (LIBMODPLUG,       libmodplug);
> > -    REGISTER_DEMUXER (LIBOPENMPT,       libopenmpt);
> > +static void av_format_init_next(void)
> > +{
> > +    AVOutputFormat *prevout = NULL, *out;
> > +    AVInputFormat *previn = NULL, *in;
> > +    void *i = 0;
> > +
> > +    while ((out = (AVOutputFormat*)av_muxer_iterate(&i))) {
> > +        if (prevout)
> > +            prevout->next = out;
> > +        prevout = out;
> > +    }
> > +
> > +    i = 0;
> > +    while ((in = (AVInputFormat*)av_demuxer_iterate(&i))) {
> > +        if (previn)
> > +            previn->next = in;
> > +        previn = in;
> > +    }
> > +}
> > +
> > +AVInputFormat *av_iformat_next(const AVInputFormat *f)
> > +{
> > +    ff_thread_once(&av_format_next_init, av_format_init_next);
> > +    if (f)
> > +        return f->next;
> > +    else
> > +        return demuxer_list[0];
> > +}
> > +
> > +AVOutputFormat *av_oformat_next(const AVOutputFormat *f)
> > +{
> > +    ff_thread_once(&av_format_next_init, av_format_init_next);
> > +    if (f)
> > +        return f->next;
> > +    else
> > +        return muxer_list[0];
> >  }
> >
> >  void av_register_all(void)
> >  {
> > -    static AVOnce control = AV_ONCE_INIT;
> > +    ff_thread_once(&av_format_next_init, av_format_init_next);
> > +}
> >
> > -    ff_thread_once(&control, register_all);
> > +void av_register_input_format(AVInputFormat *format)
> > +{
> > +    ff_thread_once(&av_format_next_init, av_format_init_next);
> > +}
> > +
> > +void av_register_output_format(AVOutputFormat *format)
> > +{
> > +    ff_thread_once(&av_format_next_init, av_format_init_next);
> >  }
> > +FF_ENABLE_DEPRECATION_WARNINGS
> > +#endif
> > diff --git a/libavformat/avformat.h b/libavformat/avformat.h
> > index 82f9845..4ea1b5a 100644
> > --- a/libavformat/avformat.h
> > +++ b/libavformat/avformat.h
> > @@ -2011,6 +2011,7 @@ const char *avformat_configuration(void);
> >   */
> >  const char *avformat_license(void);
> >
> > +#if FF_API_NEXT
> >  /**
> >   * Initialize libavformat and register all the muxers, demuxers and
> >   * protocols. If you do not call this function, then you can select
> > @@ -2019,10 +2020,14 @@ const char *avformat_license(void);
> >   * @see av_register_input_format()
> >   * @see av_register_output_format()
> >   */
> > +attribute_deprecated
> >  void av_register_all(void);
> >
> > +attribute_deprecated
> >  void av_register_input_format(AVInputFormat *format);
> > +attribute_deprecated
> >  void av_register_output_format(AVOutputFormat *format);
> > +#endif
> >
> >  /**
> >   * Do global initialization of network libraries. This is optional,
> > @@ -2046,11 +2051,13 @@ int avformat_network_init(void);
> >   */
> >  int avformat_network_deinit(void);
> >
> > +#if FF_API_NEXT
> >  /**
> >   * If f is NULL, returns the first registered input format,
> >   * if f is non-NULL, returns the next registered input format after f
> >   * or NULL if f is the last one.
> >   */
> > +attribute_deprecated
> >  AVInputFormat  *av_iformat_next(const AVInputFormat  *f);
> >
> >  /**
> > @@ -2058,7 +2065,31 @@ AVInputFormat  *av_iformat_next(const
> AVInputFormat  *f);
> >   * if f is non-NULL, returns the next registered output format after f
> >   * or NULL if f is the last one.
> >   */
> > +attribute_deprecated
> >  AVOutputFormat *av_oformat_next(const AVOutputFormat *f);
> > +#endif
> > +
> > +/**
> > + * Iterate over all registered muxers.
> > + *
> > + * @param opaque a pointer where libavformat will store the iteration
> state. Must
> > + *               point to NULL to start the iteration.
> > + *
> > + * @return the next registered muxer or NULL when the iteration is
> > + *         finished
> > + */
> > +const AVOutputFormat *av_muxer_iterate(void **opaque);
> > +
> > +/**
> > + * Iterate over all registered demuxers.
> > + *
> > + * @param opaque a pointer where libavformat will store the iteration
> state. Must
> > + *               point to NULL to start the iteration.
> > + *
> > + * @return the next registered demuxer or NULL when the iteration is
> > + *         finished
> > + */
> > +const AVInputFormat *av_demuxer_iterate(void **opaque);
> >
> >  /**
> >   * Allocate an AVFormatContext.
> > diff --git a/libavformat/format.c b/libavformat/format.c
> > index 759b5b1..608af1b 100644
> > --- a/libavformat/format.c
> > +++ b/libavformat/format.c
> > @@ -34,65 +34,6 @@
> >   * @file
> >   * Format register and lookup
> >   */
> > -/** head of registered input format linked list */
> > -static AVInputFormat *first_iformat = NULL;
> > -/** head of registered output format linked list */
> > -static AVOutputFormat *first_oformat = NULL;
> > -
> > -static AVInputFormat **last_iformat = &first_iformat;
> > -static AVOutputFormat **last_oformat = &first_oformat;
> > -
> > -AVInputFormat *av_iformat_next(const AVInputFormat *f)
> > -{
> > -    if (f)
> > -        return f->next;
> > -    else
> > -        return first_iformat;
> > -}
> > -
> > -AVOutputFormat *av_oformat_next(const AVOutputFormat *f)
> > -{
> > -    if (f)
> > -        return f->next;
> > -    else
> > -        return first_oformat;
> > -}
> > -
> > -static AVMutex iformat_register_mutex = AV_MUTEX_INITIALIZER;
> > -
> > -void av_register_input_format(AVInputFormat *format)
> > -{
> > -    AVInputFormat **p;
> > -
> > -    ff_mutex_lock(&iformat_register_mutex);
> > -    p = last_iformat;
> > -
> > -    while (*p)
> > -        p = &(*p)->next;
> > -    *p = format;
> > -    format->next = NULL;
> > -    last_iformat = &format->next;
> > -
> > -    ff_mutex_unlock(&iformat_register_mutex);
> > -}
> > -
> > -static AVMutex oformat_register_mutex = AV_MUTEX_INITIALIZER;
> > -
> > -void av_register_output_format(AVOutputFormat *format)
> > -{
> > -    AVOutputFormat **p;
> > -
> > -    ff_mutex_lock(&oformat_register_mutex);
> > -    p = last_oformat;
> > -
> > -    while (*p)
> > -        p = &(*p)->next;
> > -    *p = format;
> > -    format->next = NULL;
> > -    last_oformat = &format->next;
> > -
> > -    ff_mutex_unlock(&oformat_register_mutex);
> > -}
> >
> >  int av_match_ext(const char *filename, const char *extensions)
> >  {
> > @@ -111,6 +52,7 @@ AVOutputFormat *av_guess_format(const char
> *short_name, const char *filename,
> >                                  const char *mime_type)
> >  {
> >      AVOutputFormat *fmt = NULL, *fmt_found;
> > +    void *i = 0;
> >      int score_max, score;
> >
> >      /* specific test for image sequences */
> > @@ -124,7 +66,7 @@ AVOutputFormat *av_guess_format(const char
> *short_name, const char *filename,
> >      /* Find the proper file type. */
> >      fmt_found = NULL;
> >      score_max = 0;
> > -    while ((fmt = av_oformat_next(fmt))) {
> > +    while ((fmt = av_muxer_iterate(&i))) {
> >          score = 0;
> >          if (fmt->name && short_name && av_match_name(short_name,
> fmt->name))
> >              score += 100;
> > @@ -176,7 +118,8 @@ enum AVCodecID av_guess_codec(AVOutputFormat *fmt,
> const char *short_name,
> >  AVInputFormat *av_find_input_format(const char *short_name)
> >  {
> >      AVInputFormat *fmt = NULL;
> > -    while ((fmt = av_iformat_next(fmt)))
> > +    void *i = 0;
> > +    while ((fmt = av_demuxer_iterate(&i)))
> >          if (av_match_name(short_name, fmt->name))
> >              return fmt;
> >      return NULL;
> > @@ -188,6 +131,7 @@ AVInputFormat *av_probe_input_format3(AVProbeData
> *pd, int is_opened,
> >      AVProbeData lpd = *pd;
> >      AVInputFormat *fmt1 = NULL, *fmt;
> >      int score, score_max = 0;
> > +    void *i = 0;
> >      const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
> >      enum nodat {
> >          NO_ID3,
> > @@ -213,7 +157,7 @@ AVInputFormat *av_probe_input_format3(AVProbeData
> *pd, int is_opened,
> >      }
> >
> >      fmt = NULL;
> > -    while ((fmt1 = av_iformat_next(fmt1))) {
> > +    while ((fmt1 = av_demuxer_iterate(&i))) {
> >          if (!is_opened == !(fmt1->flags & AVFMT_NOFILE) &&
> strcmp(fmt1->name, "image2"))
> >              continue;
> >          score = 0;
> > diff --git a/libavformat/version.h b/libavformat/version.h
> > index 897be0c..293f697 100644
> > --- a/libavformat/version.h
> > +++ b/libavformat/version.h
> > @@ -88,6 +88,9 @@
> >  #ifndef FF_API_FORMAT_FILENAME
> >  #define FF_API_FORMAT_FILENAME          (LIBAVFORMAT_VERSION_MAJOR < 59)
> >  #endif
> > +#ifndef FF_API_NEXT
> > +#define FF_API_NEXT                     (LIBAVFORMAT_VERSION_MAJOR < 59)
> > +#endif
> >
> >
> >  #ifndef FF_API_R_FRAME_RATE
> > --
> > 2.7.4
>
> This command fails:
> ./ffmpeg -f lavfi -i aevalsrc=0 -f null -
> Unknown input format: 'lavfi'
>
> Thank's.
> _______________________________________________
> ffmpeg-devel mailing list
> ffmpeg-devel@ffmpeg.org
> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>

Can't seem to replicate, any logs or ideas?
James Almer Feb. 6, 2018, 7:44 p.m. UTC | #3 
On 2/6/2018 4:17 PM, Rostislav Pehlivanov wrote:
> On 6 February 2018 at 18:10, Muhammad Faiz <mfcc64@gmail.com> wrote:
>>
>> This command fails:
>> ./ffmpeg -f lavfi -i aevalsrc=0 -f null -
>> Unknown input format: 'lavfi'
>>
>> Thank's.
>> _______________________________________________
>> ffmpeg-devel mailing list
>> ffmpeg-devel@ffmpeg.org
>> http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
>>
> 
> Can't seem to replicate, any logs or ideas?

You can reproduce it if you apply this set up to this patch only.
One of the following commits in this set (probably the lavd one, patch
5/7) fixes it.

Bad for bisecting, but it's not like it's the first time it happens.
Still, would be nice if this kind of breakage between patches in a set
can be avoided in the future.
Carl Eugen Hoyos Feb. 6, 2018, 11:14 p.m. UTC | #4 
2018-02-06 20:44 GMT+01:00 James Almer <jamrial@gmail.com>:
> On 2/6/2018 4:17 PM, Rostislav Pehlivanov wrote:
>> On 6 February 2018 at 18:10, Muhammad Faiz <mfcc64@gmail.com> wrote:
>>>
>>> This command fails:
>>> ./ffmpeg -f lavfi -i aevalsrc=0 -f null -
>>> Unknown input format: 'lavfi'

>> Can't seem to replicate, any logs or ideas?
>
> You can reproduce it if you apply this set up to this patch only.
> One of the following commits in this set (probably the lavd one, patch
> 5/7) fixes it.
>
> Bad for bisecting, but it's not like it's the first time it happens.

I sincerely hope this never happens if we know in advance.

Carl Eugen
diff mbox

Patch

diff --git a/Makefile b/Makefile
index 1d1c886..0cd0a1d 100644
--- a/Makefile
+++ b/Makefile
@@ -143,7 +143,8 @@  distclean:: clean
 		ffbuild/.config ffbuild/config.* libavutil/avconfig.h \
 		version.h libavutil/ffversion.h libavcodec/codec_names.h \
 		libavcodec/bsf_list.c libavformat/protocol_list.c \
-		libavcodec/codec_list.c libavcodec/parser_list.c
+		libavcodec/codec_list.c libavcodec/parser_list.c \
+		libavformat/muxer_list.c libavformat/demuxer_list.c
 ifeq ($(SRC_LINK),src)
 	$(RM) src
 endif
diff --git a/configure b/configure
index e8795d8..d6d7980 100755
--- a/configure
+++ b/configure
@@ -3523,8 +3523,6 @@  find_things(){
     sed -n "s/^[^#]*$pattern.*([^,]*, *\([^,]*\)\(,.*\)*).*/\1_$thing/p" "$file"
 }
 
-MUXER_LIST=$(find_things    muxer    _MUX     libavformat/allformats.c)
-DEMUXER_LIST=$(find_things  demuxer  DEMUX    libavformat/allformats.c)
 OUTDEV_LIST=$(find_things   outdev   OUTDEV   libavdevice/alldevices.c)
 INDEV_LIST=$(find_things    indev    _IN      libavdevice/alldevices.c)
 FILTER_LIST=$(find_things   filter   FILTER   libavfilter/allfilters.c)
@@ -3536,6 +3534,8 @@  find_things_extern(){
     sed -n "s/^[^#]*extern.*$pattern *ff_\([^ ]*\)_$thing;/\1_$thing/p" "$file"
 }
 
+MUXER_LIST=$(find_things_extern muxer AVOutputFormat libavformat/allformats.c)
+DEMUXER_LIST=$(find_things_extern demuxer AVInputFormat libavformat/allformats.c)
 ENCODER_LIST=$(find_things_extern encoder AVCodec libavcodec/allcodecs.c)
 DECODER_LIST=$(find_things_extern decoder AVCodec libavcodec/allcodecs.c)
 CODEC_LIST="
@@ -7034,6 +7034,8 @@  print_enabled_components(){
 print_enabled_components libavcodec/codec_list.c AVCodec codec_list $CODEC_LIST
 print_enabled_components libavcodec/parser_list.c AVCodecParser parser_list $PARSER_LIST
 print_enabled_components libavcodec/bsf_list.c AVBitStreamFilter bitstream_filters $BSF_LIST
+print_enabled_components libavformat/demuxer_list.c AVInputFormat demuxer_list $DEMUXER_LIST
+print_enabled_components libavformat/muxer_list.c AVOutputFormat muxer_list $MUXER_LIST
 print_enabled_components libavformat/protocol_list.c URLProtocol url_protocols $PROTOCOL_LIST
 
 # Settings for pkg-config files
diff --git a/doc/APIchanges b/doc/APIchanges
index 77da22c..2a12f22 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -15,7 +15,12 @@  libavutil:     2017-10-21
 
 API changes, most recent first:
 
-2018-01-xx - xxxxxxx - lavc 58.9.100 - avcodec.h
+2018-xx-xx - xxxxxxx - lavf 58.9.100 - avformat.h
+  Deprecate use of av_register_input_format(), av_register_output_format(),
+  avformat_register_all(), av_iformat_next(), av_oformat_next().
+  Add av_demuxer_iterate(), and av_muxer_iterate().
+
+2018-xx-xx - xxxxxxx - lavc 58.9.100 - avcodec.h
   Deprecate use of avcodec_register(), avcodec_register_all(), and
   av_codec_next(). Add av_codec_iterate().
 
diff --git a/libavformat/.gitignore b/libavformat/.gitignore
index cdc24b7..fb70c12 100644
--- a/libavformat/.gitignore
+++ b/libavformat/.gitignore
@@ -1 +1,3 @@ 
 /protocol_list.c
+/muxer_list.c
+/demuxer_list.c
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 83ed766..0f198d5 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -26,370 +26,528 @@ 
 #include "url.h"
 #include "version.h"
 
-#define REGISTER_MUXER(X, x)                                            \
-    {                                                                   \
-        extern AVOutputFormat ff_##x##_muxer;                           \
-        if (CONFIG_##X##_MUXER)                                         \
-            av_register_output_format(&ff_##x##_muxer);                 \
-    }
+/* (de)muxers */
+extern AVOutputFormat ff_a64_muxer;
+extern AVInputFormat  ff_aa_demuxer;
+extern AVInputFormat  ff_aac_demuxer;
+extern AVInputFormat  ff_ac3_demuxer;
+extern AVOutputFormat ff_ac3_muxer;
+extern AVInputFormat  ff_acm_demuxer;
+extern AVInputFormat  ff_act_demuxer;
+extern AVInputFormat  ff_adf_demuxer;
+extern AVInputFormat  ff_adp_demuxer;
+extern AVInputFormat  ff_ads_demuxer;
+extern AVOutputFormat ff_adts_muxer;
+extern AVInputFormat  ff_adx_demuxer;
+extern AVOutputFormat ff_adx_muxer;
+extern AVInputFormat  ff_aea_demuxer;
+extern AVInputFormat  ff_afc_demuxer;
+extern AVInputFormat  ff_aiff_demuxer;
+extern AVOutputFormat ff_aiff_muxer;
+extern AVInputFormat  ff_aix_demuxer;
+extern AVInputFormat  ff_amr_demuxer;
+extern AVOutputFormat ff_amr_muxer;
+extern AVInputFormat  ff_amrnb_demuxer;
+extern AVInputFormat  ff_amrwb_demuxer;
+extern AVInputFormat  ff_anm_demuxer;
+extern AVInputFormat  ff_apc_demuxer;
+extern AVInputFormat  ff_ape_demuxer;
+extern AVInputFormat  ff_apng_demuxer;
+extern AVOutputFormat ff_apng_muxer;
+extern AVInputFormat  ff_aptx_demuxer;
+extern AVOutputFormat ff_aptx_muxer;
+extern AVInputFormat  ff_aqtitle_demuxer;
+extern AVInputFormat  ff_asf_demuxer;
+extern AVOutputFormat ff_asf_muxer;
+extern AVInputFormat  ff_asf_o_demuxer;
+extern AVInputFormat  ff_ass_demuxer;
+extern AVOutputFormat ff_ass_muxer;
+extern AVInputFormat  ff_ast_demuxer;
+extern AVOutputFormat ff_ast_muxer;
+extern AVOutputFormat ff_asf_stream_muxer;
+extern AVInputFormat  ff_au_demuxer;
+extern AVOutputFormat ff_au_muxer;
+extern AVInputFormat  ff_avi_demuxer;
+extern AVOutputFormat ff_avi_muxer;
+extern AVInputFormat  ff_avisynth_demuxer;
+extern AVOutputFormat ff_avm2_muxer;
+extern AVInputFormat  ff_avr_demuxer;
+extern AVInputFormat  ff_avs_demuxer;
+extern AVInputFormat  ff_bethsoftvid_demuxer;
+extern AVInputFormat  ff_bfi_demuxer;
+extern AVInputFormat  ff_bintext_demuxer;
+extern AVInputFormat  ff_bink_demuxer;
+extern AVInputFormat  ff_bit_demuxer;
+extern AVOutputFormat ff_bit_muxer;
+extern AVInputFormat  ff_bmv_demuxer;
+extern AVInputFormat  ff_bfstm_demuxer;
+extern AVInputFormat  ff_brstm_demuxer;
+extern AVInputFormat  ff_boa_demuxer;
+extern AVInputFormat  ff_c93_demuxer;
+extern AVInputFormat  ff_caf_demuxer;
+extern AVOutputFormat ff_caf_muxer;
+extern AVInputFormat  ff_cavsvideo_demuxer;
+extern AVOutputFormat ff_cavsvideo_muxer;
+extern AVInputFormat  ff_cdg_demuxer;
+extern AVInputFormat  ff_cdxl_demuxer;
+extern AVInputFormat  ff_cine_demuxer;
+extern AVInputFormat  ff_concat_demuxer;
+extern AVOutputFormat ff_crc_muxer;
+extern AVInputFormat  ff_dash_demuxer;
+extern AVOutputFormat ff_dash_muxer;
+extern AVInputFormat  ff_data_demuxer;
+extern AVOutputFormat ff_data_muxer;
+extern AVInputFormat  ff_daud_demuxer;
+extern AVOutputFormat ff_daud_muxer;
+extern AVInputFormat  ff_dcstr_demuxer;
+extern AVInputFormat  ff_dfa_demuxer;
+extern AVInputFormat  ff_dirac_demuxer;
+extern AVOutputFormat ff_dirac_muxer;
+extern AVInputFormat  ff_dnxhd_demuxer;
+extern AVOutputFormat ff_dnxhd_muxer;
+extern AVInputFormat  ff_dsf_demuxer;
+extern AVInputFormat  ff_dsicin_demuxer;
+extern AVInputFormat  ff_dss_demuxer;
+extern AVInputFormat  ff_dts_demuxer;
+extern AVOutputFormat ff_dts_muxer;
+extern AVInputFormat  ff_dtshd_demuxer;
+extern AVInputFormat  ff_dv_demuxer;
+extern AVOutputFormat ff_dv_muxer;
+extern AVInputFormat  ff_dvbsub_demuxer;
+extern AVInputFormat  ff_dvbtxt_demuxer;
+extern AVInputFormat  ff_dxa_demuxer;
+extern AVInputFormat  ff_ea_demuxer;
+extern AVInputFormat  ff_ea_cdata_demuxer;
+extern AVInputFormat  ff_eac3_demuxer;
+extern AVOutputFormat ff_eac3_muxer;
+extern AVInputFormat  ff_epaf_demuxer;
+extern AVOutputFormat ff_f4v_muxer;
+extern AVInputFormat  ff_ffmetadata_demuxer;
+extern AVOutputFormat ff_ffmetadata_muxer;
+extern AVOutputFormat ff_fifo_muxer;
+extern AVInputFormat  ff_filmstrip_demuxer;
+extern AVOutputFormat ff_filmstrip_muxer;
+extern AVInputFormat  ff_fits_demuxer;
+extern AVOutputFormat ff_fits_muxer;
+extern AVInputFormat  ff_flac_demuxer;
+extern AVOutputFormat ff_flac_muxer;
+extern AVInputFormat  ff_flic_demuxer;
+extern AVInputFormat  ff_flv_demuxer;
+extern AVOutputFormat ff_flv_muxer;
+extern AVInputFormat  ff_live_flv_demuxer;
+extern AVInputFormat  ff_fourxm_demuxer;
+extern AVOutputFormat ff_framecrc_muxer;
+extern AVOutputFormat ff_framehash_muxer;
+extern AVOutputFormat ff_framemd5_muxer;
+extern AVInputFormat  ff_frm_demuxer;
+extern AVInputFormat  ff_fsb_demuxer;
+extern AVInputFormat  ff_g722_demuxer;
+extern AVOutputFormat ff_g722_muxer;
+extern AVInputFormat  ff_g723_1_demuxer;
+extern AVOutputFormat ff_g723_1_muxer;
+extern AVInputFormat  ff_g726_demuxer;
+extern AVOutputFormat ff_g726_muxer;
+extern AVInputFormat  ff_g726le_demuxer;
+extern AVOutputFormat ff_g726le_muxer;
+extern AVInputFormat  ff_g729_demuxer;
+extern AVInputFormat  ff_gdv_demuxer;
+extern AVInputFormat  ff_genh_demuxer;
+extern AVInputFormat  ff_gif_demuxer;
+extern AVOutputFormat ff_gif_muxer;
+extern AVInputFormat  ff_gsm_demuxer;
+extern AVOutputFormat ff_gsm_muxer;
+extern AVInputFormat  ff_gxf_demuxer;
+extern AVOutputFormat ff_gxf_muxer;
+extern AVInputFormat  ff_h261_demuxer;
+extern AVOutputFormat ff_h261_muxer;
+extern AVInputFormat  ff_h263_demuxer;
+extern AVOutputFormat ff_h263_muxer;
+extern AVInputFormat  ff_h264_demuxer;
+extern AVOutputFormat ff_h264_muxer;
+extern AVOutputFormat ff_hash_muxer;
+extern AVOutputFormat ff_hds_muxer;
+extern AVInputFormat  ff_hevc_demuxer;
+extern AVOutputFormat ff_hevc_muxer;
+extern AVInputFormat  ff_hls_demuxer;
+extern AVOutputFormat ff_hls_muxer;
+extern AVInputFormat  ff_hnm_demuxer;
+extern AVInputFormat  ff_ico_demuxer;
+extern AVOutputFormat ff_ico_muxer;
+extern AVInputFormat  ff_idcin_demuxer;
+extern AVInputFormat  ff_idf_demuxer;
+extern AVInputFormat  ff_iff_demuxer;
+extern AVInputFormat  ff_ilbc_demuxer;
+extern AVOutputFormat ff_ilbc_muxer;
+extern AVInputFormat  ff_image2_demuxer;
+extern AVOutputFormat ff_image2_muxer;
+extern AVInputFormat  ff_image2pipe_demuxer;
+extern AVOutputFormat ff_image2pipe_muxer;
+extern AVInputFormat  ff_image2_alias_pix_demuxer;
+extern AVInputFormat  ff_image2_brender_pix_demuxer;
+extern AVInputFormat  ff_ingenient_demuxer;
+extern AVInputFormat  ff_ipmovie_demuxer;
+extern AVOutputFormat ff_ipod_muxer;
+extern AVInputFormat  ff_ircam_demuxer;
+extern AVOutputFormat ff_ircam_muxer;
+extern AVOutputFormat ff_ismv_muxer;
+extern AVInputFormat  ff_iss_demuxer;
+extern AVInputFormat  ff_iv8_demuxer;
+extern AVInputFormat  ff_ivf_demuxer;
+extern AVOutputFormat ff_ivf_muxer;
+extern AVInputFormat  ff_ivr_demuxer;
+extern AVInputFormat  ff_jacosub_demuxer;
+extern AVOutputFormat ff_jacosub_muxer;
+extern AVInputFormat  ff_jv_demuxer;
+extern AVOutputFormat ff_latm_muxer;
+extern AVInputFormat  ff_lmlm4_demuxer;
+extern AVInputFormat  ff_loas_demuxer;
+extern AVInputFormat  ff_lrc_demuxer;
+extern AVOutputFormat ff_lrc_muxer;
+extern AVInputFormat  ff_lvf_demuxer;
+extern AVInputFormat  ff_lxf_demuxer;
+extern AVInputFormat  ff_m4v_demuxer;
+extern AVOutputFormat ff_m4v_muxer;
+extern AVOutputFormat ff_md5_muxer;
+extern AVInputFormat  ff_matroska_demuxer;
+extern AVOutputFormat ff_matroska_muxer;
+extern AVOutputFormat ff_matroska_audio_muxer;
+extern AVInputFormat  ff_mgsts_demuxer;
+extern AVInputFormat  ff_microdvd_demuxer;
+extern AVOutputFormat ff_microdvd_muxer;
+extern AVInputFormat  ff_mjpeg_demuxer;
+extern AVOutputFormat ff_mjpeg_muxer;
+extern AVInputFormat  ff_mjpeg_2000_demuxer;
+extern AVInputFormat  ff_mlp_demuxer;
+extern AVOutputFormat ff_mlp_muxer;
+extern AVInputFormat  ff_mlv_demuxer;
+extern AVInputFormat  ff_mm_demuxer;
+extern AVInputFormat  ff_mmf_demuxer;
+extern AVOutputFormat ff_mmf_muxer;
+extern AVInputFormat  ff_mov_demuxer;
+extern AVOutputFormat ff_mov_muxer;
+extern AVOutputFormat ff_mp2_muxer;
+extern AVInputFormat  ff_mp3_demuxer;
+extern AVOutputFormat ff_mp3_muxer;
+extern AVOutputFormat ff_mp4_muxer;
+extern AVInputFormat  ff_mpc_demuxer;
+extern AVInputFormat  ff_mpc8_demuxer;
+extern AVOutputFormat ff_mpeg1system_muxer;
+extern AVOutputFormat ff_mpeg1vcd_muxer;
+extern AVOutputFormat ff_mpeg1video_muxer;
+extern AVOutputFormat ff_mpeg2dvd_muxer;
+extern AVOutputFormat ff_mpeg2svcd_muxer;
+extern AVOutputFormat ff_mpeg2video_muxer;
+extern AVOutputFormat ff_mpeg2vob_muxer;
+extern AVInputFormat  ff_mpegps_demuxer;
+extern AVInputFormat  ff_mpegts_demuxer;
+extern AVOutputFormat ff_mpegts_muxer;
+extern AVInputFormat  ff_mpegtsraw_demuxer;
+extern AVInputFormat  ff_mpegvideo_demuxer;
+extern AVInputFormat  ff_mpjpeg_demuxer;
+extern AVOutputFormat ff_mpjpeg_muxer;
+extern AVInputFormat  ff_mpl2_demuxer;
+extern AVInputFormat  ff_mpsub_demuxer;
+extern AVInputFormat  ff_msf_demuxer;
+extern AVInputFormat  ff_msnwc_tcp_demuxer;
+extern AVInputFormat  ff_mtaf_demuxer;
+extern AVInputFormat  ff_mtv_demuxer;
+extern AVInputFormat  ff_musx_demuxer;
+extern AVInputFormat  ff_mv_demuxer;
+extern AVInputFormat  ff_mvi_demuxer;
+extern AVInputFormat  ff_mxf_demuxer;
+extern AVOutputFormat ff_mxf_muxer;
+extern AVOutputFormat ff_mxf_d10_muxer;
+extern AVOutputFormat ff_mxf_opatom_muxer;
+extern AVInputFormat  ff_mxg_demuxer;
+extern AVInputFormat  ff_nc_demuxer;
+extern AVInputFormat  ff_nistsphere_demuxer;
+extern AVInputFormat  ff_nsp_demuxer;
+extern AVInputFormat  ff_nsv_demuxer;
+extern AVOutputFormat ff_null_muxer;
+extern AVInputFormat  ff_nut_demuxer;
+extern AVOutputFormat ff_nut_muxer;
+extern AVInputFormat  ff_nuv_demuxer;
+extern AVOutputFormat ff_oga_muxer;
+extern AVInputFormat  ff_ogg_demuxer;
+extern AVOutputFormat ff_ogg_muxer;
+extern AVOutputFormat ff_ogv_muxer;
+extern AVInputFormat  ff_oma_demuxer;
+extern AVOutputFormat ff_oma_muxer;
+extern AVOutputFormat ff_opus_muxer;
+extern AVInputFormat  ff_paf_demuxer;
+extern AVInputFormat  ff_pcm_alaw_demuxer;
+extern AVOutputFormat ff_pcm_alaw_muxer;
+extern AVInputFormat  ff_pcm_mulaw_demuxer;
+extern AVOutputFormat ff_pcm_mulaw_muxer;
+extern AVInputFormat  ff_pcm_f64be_demuxer;
+extern AVOutputFormat ff_pcm_f64be_muxer;
+extern AVInputFormat  ff_pcm_f64le_demuxer;
+extern AVOutputFormat ff_pcm_f64le_muxer;
+extern AVInputFormat  ff_pcm_f32be_demuxer;
+extern AVOutputFormat ff_pcm_f32be_muxer;
+extern AVInputFormat  ff_pcm_f32le_demuxer;
+extern AVOutputFormat ff_pcm_f32le_muxer;
+extern AVInputFormat  ff_pcm_s32be_demuxer;
+extern AVOutputFormat ff_pcm_s32be_muxer;
+extern AVInputFormat  ff_pcm_s32le_demuxer;
+extern AVOutputFormat ff_pcm_s32le_muxer;
+extern AVInputFormat  ff_pcm_s24be_demuxer;
+extern AVOutputFormat ff_pcm_s24be_muxer;
+extern AVInputFormat  ff_pcm_s24le_demuxer;
+extern AVOutputFormat ff_pcm_s24le_muxer;
+extern AVInputFormat  ff_pcm_s16be_demuxer;
+extern AVOutputFormat ff_pcm_s16be_muxer;
+extern AVInputFormat  ff_pcm_s16le_demuxer;
+extern AVOutputFormat ff_pcm_s16le_muxer;
+extern AVInputFormat  ff_pcm_s8_demuxer;
+extern AVOutputFormat ff_pcm_s8_muxer;
+extern AVInputFormat  ff_pcm_u32be_demuxer;
+extern AVOutputFormat ff_pcm_u32be_muxer;
+extern AVInputFormat  ff_pcm_u32le_demuxer;
+extern AVOutputFormat ff_pcm_u32le_muxer;
+extern AVInputFormat  ff_pcm_u24be_demuxer;
+extern AVOutputFormat ff_pcm_u24be_muxer;
+extern AVInputFormat  ff_pcm_u24le_demuxer;
+extern AVOutputFormat ff_pcm_u24le_muxer;
+extern AVInputFormat  ff_pcm_u16be_demuxer;
+extern AVOutputFormat ff_pcm_u16be_muxer;
+extern AVInputFormat  ff_pcm_u16le_demuxer;
+extern AVOutputFormat ff_pcm_u16le_muxer;
+extern AVInputFormat  ff_pcm_u8_demuxer;
+extern AVOutputFormat ff_pcm_u8_muxer;
+extern AVInputFormat  ff_pjs_demuxer;
+extern AVInputFormat  ff_pmp_demuxer;
+extern AVOutputFormat ff_psp_muxer;
+extern AVInputFormat  ff_pva_demuxer;
+extern AVInputFormat  ff_pvf_demuxer;
+extern AVInputFormat  ff_qcp_demuxer;
+extern AVInputFormat  ff_r3d_demuxer;
+extern AVInputFormat  ff_rawvideo_demuxer;
+extern AVOutputFormat ff_rawvideo_muxer;
+extern AVInputFormat  ff_realtext_demuxer;
+extern AVInputFormat  ff_redspark_demuxer;
+extern AVInputFormat  ff_rl2_demuxer;
+extern AVInputFormat  ff_rm_demuxer;
+extern AVOutputFormat ff_rm_muxer;
+extern AVInputFormat  ff_roq_demuxer;
+extern AVOutputFormat ff_roq_muxer;
+extern AVInputFormat  ff_rpl_demuxer;
+extern AVInputFormat  ff_rsd_demuxer;
+extern AVInputFormat  ff_rso_demuxer;
+extern AVOutputFormat ff_rso_muxer;
+extern AVInputFormat  ff_rtp_demuxer;
+extern AVOutputFormat ff_rtp_muxer;
+extern AVOutputFormat ff_rtp_mpegts_muxer;
+extern AVInputFormat  ff_rtsp_demuxer;
+extern AVOutputFormat ff_rtsp_muxer;
+extern AVInputFormat  ff_s337m_demuxer;
+extern AVInputFormat  ff_sami_demuxer;
+extern AVInputFormat  ff_sap_demuxer;
+extern AVOutputFormat ff_sap_muxer;
+extern AVInputFormat  ff_sbg_demuxer;
+extern AVInputFormat  ff_scc_demuxer;
+extern AVOutputFormat ff_scc_muxer;
+extern AVInputFormat  ff_sdp_demuxer;
+extern AVInputFormat  ff_sdr2_demuxer;
+extern AVInputFormat  ff_sds_demuxer;
+extern AVInputFormat  ff_sdx_demuxer;
+extern AVInputFormat  ff_segafilm_demuxer;
+extern AVOutputFormat ff_segment_muxer;
+extern AVOutputFormat ff_stream_segment_muxer;
+extern AVInputFormat  ff_shorten_demuxer;
+extern AVInputFormat  ff_siff_demuxer;
+extern AVOutputFormat ff_singlejpeg_muxer;
+extern AVInputFormat  ff_sln_demuxer;
+extern AVInputFormat  ff_smacker_demuxer;
+extern AVInputFormat  ff_smjpeg_demuxer;
+extern AVOutputFormat ff_smjpeg_muxer;
+extern AVOutputFormat ff_smoothstreaming_muxer;
+extern AVInputFormat  ff_smush_demuxer;
+extern AVInputFormat  ff_sol_demuxer;
+extern AVInputFormat  ff_sox_demuxer;
+extern AVOutputFormat ff_sox_muxer;
+extern AVOutputFormat ff_spx_muxer;
+extern AVInputFormat  ff_spdif_demuxer;
+extern AVOutputFormat ff_spdif_muxer;
+extern AVInputFormat  ff_srt_demuxer;
+extern AVOutputFormat ff_srt_muxer;
+extern AVInputFormat  ff_str_demuxer;
+extern AVInputFormat  ff_stl_demuxer;
+extern AVInputFormat  ff_subviewer1_demuxer;
+extern AVInputFormat  ff_subviewer_demuxer;
+extern AVInputFormat  ff_sup_demuxer;
+extern AVOutputFormat ff_sup_muxer;
+extern AVInputFormat  ff_svag_demuxer;
+extern AVInputFormat  ff_swf_demuxer;
+extern AVOutputFormat ff_swf_muxer;
+extern AVInputFormat  ff_tak_demuxer;
+extern AVOutputFormat ff_tee_muxer;
+extern AVInputFormat  ff_tedcaptions_demuxer;
+extern AVOutputFormat ff_tg2_muxer;
+extern AVOutputFormat ff_tgp_muxer;
+extern AVInputFormat  ff_thp_demuxer;
+extern AVInputFormat  ff_threedostr_demuxer;
+extern AVInputFormat  ff_tiertexseq_demuxer;
+extern AVOutputFormat ff_mkvtimestamp_v2_muxer;
+extern AVInputFormat  ff_tmv_demuxer;
+extern AVInputFormat  ff_truehd_demuxer;
+extern AVOutputFormat ff_truehd_muxer;
+extern AVInputFormat  ff_tta_demuxer;
+extern AVOutputFormat ff_tta_muxer;
+extern AVInputFormat  ff_txd_demuxer;
+extern AVInputFormat  ff_tty_demuxer;
+extern AVInputFormat  ff_ty_demuxer;
+extern AVOutputFormat ff_uncodedframecrc_muxer;
+extern AVInputFormat  ff_v210_demuxer;
+extern AVInputFormat  ff_v210x_demuxer;
+extern AVInputFormat  ff_vag_demuxer;
+extern AVInputFormat  ff_vc1_demuxer;
+extern AVOutputFormat ff_vc1_muxer;
+extern AVInputFormat  ff_vc1t_demuxer;
+extern AVOutputFormat ff_vc1t_muxer;
+extern AVInputFormat  ff_vivo_demuxer;
+extern AVInputFormat  ff_vmd_demuxer;
+extern AVInputFormat  ff_vobsub_demuxer;
+extern AVInputFormat  ff_voc_demuxer;
+extern AVOutputFormat ff_voc_muxer;
+extern AVInputFormat  ff_vpk_demuxer;
+extern AVInputFormat  ff_vplayer_demuxer;
+extern AVInputFormat  ff_vqf_demuxer;
+extern AVInputFormat  ff_w64_demuxer;
+extern AVOutputFormat ff_w64_muxer;
+extern AVInputFormat  ff_wav_demuxer;
+extern AVOutputFormat ff_wav_muxer;
+extern AVInputFormat  ff_wc3_demuxer;
+extern AVOutputFormat ff_webm_muxer;
+extern AVInputFormat  ff_webm_dash_manifest_demuxer;
+extern AVOutputFormat ff_webm_dash_manifest_muxer;
+extern AVOutputFormat ff_webm_chunk_muxer;
+extern AVOutputFormat ff_webp_muxer;
+extern AVInputFormat  ff_webvtt_demuxer;
+extern AVOutputFormat ff_webvtt_muxer;
+extern AVInputFormat  ff_wsaud_demuxer;
+extern AVInputFormat  ff_wsd_demuxer;
+extern AVInputFormat  ff_wsvqa_demuxer;
+extern AVInputFormat  ff_wtv_demuxer;
+extern AVOutputFormat ff_wtv_muxer;
+extern AVInputFormat  ff_wve_demuxer;
+extern AVInputFormat  ff_wv_demuxer;
+extern AVOutputFormat ff_wv_muxer;
+extern AVInputFormat  ff_xa_demuxer;
+extern AVInputFormat  ff_xbin_demuxer;
+extern AVInputFormat  ff_xmv_demuxer;
+extern AVInputFormat  ff_xvag_demuxer;
+extern AVInputFormat  ff_xwma_demuxer;
+extern AVInputFormat  ff_yop_demuxer;
+extern AVInputFormat  ff_yuv4mpegpipe_demuxer;
+extern AVOutputFormat ff_yuv4mpegpipe_muxer;
+/* image demuxers */
+extern AVInputFormat  ff_image_bmp_pipe_demuxer;
+extern AVInputFormat  ff_image_dds_pipe_demuxer;
+extern AVInputFormat  ff_image_dpx_pipe_demuxer;
+extern AVInputFormat  ff_image_exr_pipe_demuxer;
+extern AVInputFormat  ff_image_j2k_pipe_demuxer;
+extern AVInputFormat  ff_image_jpeg_pipe_demuxer;
+extern AVInputFormat  ff_image_jpegls_pipe_demuxer;
+extern AVInputFormat  ff_image_pam_pipe_demuxer;
+extern AVInputFormat  ff_image_pbm_pipe_demuxer;
+extern AVInputFormat  ff_image_pcx_pipe_demuxer;
+extern AVInputFormat  ff_image_pgmyuv_pipe_demuxer;
+extern AVInputFormat  ff_image_pgm_pipe_demuxer;
+extern AVInputFormat  ff_image_pictor_pipe_demuxer;
+extern AVInputFormat  ff_image_png_pipe_demuxer;
+extern AVInputFormat  ff_image_ppm_pipe_demuxer;
+extern AVInputFormat  ff_image_psd_pipe_demuxer;
+extern AVInputFormat  ff_image_qdraw_pipe_demuxer;
+extern AVInputFormat  ff_image_sgi_pipe_demuxer;
+extern AVInputFormat  ff_image_svg_pipe_demuxer;
+extern AVInputFormat  ff_image_sunrast_pipe_demuxer;
+extern AVInputFormat  ff_image_tiff_pipe_demuxer;
+extern AVInputFormat  ff_image_webp_pipe_demuxer;
+extern AVInputFormat  ff_image_xpm_pipe_demuxer;
 
-#define REGISTER_DEMUXER(X, x)                                          \
-    {                                                                   \
-        extern AVInputFormat ff_##x##_demuxer;                          \
-        if (CONFIG_##X##_DEMUXER)                                       \
-            av_register_input_format(&ff_##x##_demuxer);                \
-    }
+/* external libraries */
+extern AVOutputFormat ff_chromaprint_muxer;
+extern AVInputFormat  ff_libgme_demuxer;
+extern AVInputFormat  ff_libmodplug_demuxer;
+extern AVInputFormat  ff_libopenmpt_demuxer;
 
-#define REGISTER_MUXDEMUX(X, x) REGISTER_MUXER(X, x); REGISTER_DEMUXER(X, x)
+#include "libavformat/muxer_list.c"
+#include "libavformat/demuxer_list.c"
 
-static void register_all(void)
+const AVOutputFormat *av_muxer_iterate(void **opaque)
 {
-    avcodec_register_all();
+    uintptr_t i = (uintptr_t)*opaque;
+    const AVOutputFormat *f = muxer_list[i];
+    if (f)
+        *opaque = (void*)(i + 1);
+    return f;
+}
 
-    /* (de)muxers */
-    REGISTER_MUXER   (A64,              a64);
-    REGISTER_DEMUXER (AA,               aa);
-    REGISTER_DEMUXER (AAC,              aac);
-    REGISTER_MUXDEMUX(AC3,              ac3);
-    REGISTER_DEMUXER (ACM,              acm);
-    REGISTER_DEMUXER (ACT,              act);
-    REGISTER_DEMUXER (ADF,              adf);
-    REGISTER_DEMUXER (ADP,              adp);
-    REGISTER_DEMUXER (ADS,              ads);
-    REGISTER_MUXER   (ADTS,             adts);
-    REGISTER_MUXDEMUX(ADX,              adx);
-    REGISTER_DEMUXER (AEA,              aea);
-    REGISTER_DEMUXER (AFC,              afc);
-    REGISTER_MUXDEMUX(AIFF,             aiff);
-    REGISTER_DEMUXER (AIX,              aix);
-    REGISTER_MUXDEMUX(AMR,              amr);
-    REGISTER_DEMUXER (AMRNB,            amrnb);
-    REGISTER_DEMUXER (AMRWB,            amrwb);
-    REGISTER_DEMUXER (ANM,              anm);
-    REGISTER_DEMUXER (APC,              apc);
-    REGISTER_DEMUXER (APE,              ape);
-    REGISTER_MUXDEMUX(APNG,             apng);
-    REGISTER_MUXDEMUX(APTX,             aptx);
-    REGISTER_DEMUXER (AQTITLE,          aqtitle);
-    REGISTER_MUXDEMUX(ASF,              asf);
-    REGISTER_DEMUXER (ASF_O,            asf_o);
-    REGISTER_MUXDEMUX(ASS,              ass);
-    REGISTER_MUXDEMUX(AST,              ast);
-    REGISTER_MUXER   (ASF_STREAM,       asf_stream);
-    REGISTER_MUXDEMUX(AU,               au);
-    REGISTER_MUXDEMUX(AVI,              avi);
-    REGISTER_DEMUXER (AVISYNTH,         avisynth);
-    REGISTER_MUXER   (AVM2,             avm2);
-    REGISTER_DEMUXER (AVR,              avr);
-    REGISTER_DEMUXER (AVS,              avs);
-    REGISTER_DEMUXER (BETHSOFTVID,      bethsoftvid);
-    REGISTER_DEMUXER (BFI,              bfi);
-    REGISTER_DEMUXER (BINTEXT,          bintext);
-    REGISTER_DEMUXER (BINK,             bink);
-    REGISTER_MUXDEMUX(BIT,              bit);
-    REGISTER_DEMUXER (BMV,              bmv);
-    REGISTER_DEMUXER (BFSTM,            bfstm);
-    REGISTER_DEMUXER (BRSTM,            brstm);
-    REGISTER_DEMUXER (BOA,              boa);
-    REGISTER_DEMUXER (C93,              c93);
-    REGISTER_MUXDEMUX(CAF,              caf);
-    REGISTER_MUXDEMUX(CAVSVIDEO,        cavsvideo);
-    REGISTER_DEMUXER (CDG,              cdg);
-    REGISTER_DEMUXER (CDXL,             cdxl);
-    REGISTER_DEMUXER (CINE,             cine);
-    REGISTER_DEMUXER (CONCAT,           concat);
-    REGISTER_MUXER   (CRC,              crc);
-    REGISTER_MUXDEMUX(DASH,             dash);
-    REGISTER_MUXDEMUX(DATA,             data);
-    REGISTER_MUXDEMUX(DAUD,             daud);
-    REGISTER_DEMUXER (DCSTR,            dcstr);
-    REGISTER_DEMUXER (DFA,              dfa);
-    REGISTER_MUXDEMUX(DIRAC,            dirac);
-    REGISTER_MUXDEMUX(DNXHD,            dnxhd);
-    REGISTER_DEMUXER (DSF,              dsf);
-    REGISTER_DEMUXER (DSICIN,           dsicin);
-    REGISTER_DEMUXER (DSS,              dss);
-    REGISTER_MUXDEMUX(DTS,              dts);
-    REGISTER_DEMUXER (DTSHD,            dtshd);
-    REGISTER_MUXDEMUX(DV,               dv);
-    REGISTER_DEMUXER (DVBSUB,           dvbsub);
-    REGISTER_DEMUXER (DVBTXT,           dvbtxt);
-    REGISTER_DEMUXER (DXA,              dxa);
-    REGISTER_DEMUXER (EA,               ea);
-    REGISTER_DEMUXER (EA_CDATA,         ea_cdata);
-    REGISTER_MUXDEMUX(EAC3,             eac3);
-    REGISTER_DEMUXER (EPAF,             epaf);
-    REGISTER_MUXER   (F4V,              f4v);
-    REGISTER_MUXDEMUX(FFMETADATA,       ffmetadata);
-    REGISTER_MUXER   (FIFO,             fifo);
-    REGISTER_MUXDEMUX(FILMSTRIP,        filmstrip);
-    REGISTER_MUXDEMUX(FITS,             fits);
-    REGISTER_MUXDEMUX(FLAC,             flac);
-    REGISTER_DEMUXER (FLIC,             flic);
-    REGISTER_MUXDEMUX(FLV,              flv);
-    REGISTER_DEMUXER (LIVE_FLV,         live_flv);
-    REGISTER_DEMUXER (FOURXM,           fourxm);
-    REGISTER_MUXER   (FRAMECRC,         framecrc);
-    REGISTER_MUXER   (FRAMEHASH,        framehash);
-    REGISTER_MUXER   (FRAMEMD5,         framemd5);
-    REGISTER_DEMUXER (FRM,              frm);
-    REGISTER_DEMUXER (FSB,              fsb);
-    REGISTER_MUXDEMUX(G722,             g722);
-    REGISTER_MUXDEMUX(G723_1,           g723_1);
-    REGISTER_MUXDEMUX(G726,             g726);
-    REGISTER_MUXDEMUX(G726LE,           g726le);
-    REGISTER_DEMUXER (G729,             g729);
-    REGISTER_DEMUXER (GDV,              gdv);
-    REGISTER_DEMUXER (GENH,             genh);
-    REGISTER_MUXDEMUX(GIF,              gif);
-    REGISTER_MUXDEMUX(GSM,              gsm);
-    REGISTER_MUXDEMUX(GXF,              gxf);
-    REGISTER_MUXDEMUX(H261,             h261);
-    REGISTER_MUXDEMUX(H263,             h263);
-    REGISTER_MUXDEMUX(H264,             h264);
-    REGISTER_MUXER   (HASH,             hash);
-    REGISTER_MUXER   (HDS,              hds);
-    REGISTER_MUXDEMUX(HEVC,             hevc);
-    REGISTER_MUXDEMUX(HLS,              hls);
-    REGISTER_DEMUXER (HNM,              hnm);
-    REGISTER_MUXDEMUX(ICO,              ico);
-    REGISTER_DEMUXER (IDCIN,            idcin);
-    REGISTER_DEMUXER (IDF,              idf);
-    REGISTER_DEMUXER (IFF,              iff);
-    REGISTER_MUXDEMUX(ILBC,             ilbc);
-    REGISTER_MUXDEMUX(IMAGE2,           image2);
-    REGISTER_MUXDEMUX(IMAGE2PIPE,       image2pipe);
-    REGISTER_DEMUXER (IMAGE2_ALIAS_PIX, image2_alias_pix);
-    REGISTER_DEMUXER (IMAGE2_BRENDER_PIX, image2_brender_pix);
-    REGISTER_DEMUXER (INGENIENT,        ingenient);
-    REGISTER_DEMUXER (IPMOVIE,          ipmovie);
-    REGISTER_MUXER   (IPOD,             ipod);
-    REGISTER_MUXDEMUX(IRCAM,            ircam);
-    REGISTER_MUXER   (ISMV,             ismv);
-    REGISTER_DEMUXER (ISS,              iss);
-    REGISTER_DEMUXER (IV8,              iv8);
-    REGISTER_MUXDEMUX(IVF,              ivf);
-    REGISTER_DEMUXER (IVR,              ivr);
-    REGISTER_MUXDEMUX(JACOSUB,          jacosub);
-    REGISTER_DEMUXER (JV,               jv);
-    REGISTER_MUXER   (LATM,             latm);
-    REGISTER_DEMUXER (LMLM4,            lmlm4);
-    REGISTER_DEMUXER (LOAS,             loas);
-    REGISTER_MUXDEMUX(LRC,              lrc);
-    REGISTER_DEMUXER (LVF,              lvf);
-    REGISTER_DEMUXER (LXF,              lxf);
-    REGISTER_MUXDEMUX(M4V,              m4v);
-    REGISTER_MUXER   (MD5,              md5);
-    REGISTER_MUXDEMUX(MATROSKA,         matroska);
-    REGISTER_MUXER   (MATROSKA_AUDIO,   matroska_audio);
-    REGISTER_DEMUXER (MGSTS,            mgsts);
-    REGISTER_MUXDEMUX(MICRODVD,         microdvd);
-    REGISTER_MUXDEMUX(MJPEG,            mjpeg);
-    REGISTER_DEMUXER (MJPEG_2000,       mjpeg_2000);
-    REGISTER_MUXDEMUX(MLP,              mlp);
-    REGISTER_DEMUXER (MLV,              mlv);
-    REGISTER_DEMUXER (MM,               mm);
-    REGISTER_MUXDEMUX(MMF,              mmf);
-    REGISTER_MUXDEMUX(MOV,              mov);
-    REGISTER_MUXER   (MP2,              mp2);
-    REGISTER_MUXDEMUX(MP3,              mp3);
-    REGISTER_MUXER   (MP4,              mp4);
-    REGISTER_DEMUXER (MPC,              mpc);
-    REGISTER_DEMUXER (MPC8,             mpc8);
-    REGISTER_MUXER   (MPEG1SYSTEM,      mpeg1system);
-    REGISTER_MUXER   (MPEG1VCD,         mpeg1vcd);
-    REGISTER_MUXER   (MPEG1VIDEO,       mpeg1video);
-    REGISTER_MUXER   (MPEG2DVD,         mpeg2dvd);
-    REGISTER_MUXER   (MPEG2SVCD,        mpeg2svcd);
-    REGISTER_MUXER   (MPEG2VIDEO,       mpeg2video);
-    REGISTER_MUXER   (MPEG2VOB,         mpeg2vob);
-    REGISTER_DEMUXER (MPEGPS,           mpegps);
-    REGISTER_MUXDEMUX(MPEGTS,           mpegts);
-    REGISTER_DEMUXER (MPEGTSRAW,        mpegtsraw);
-    REGISTER_DEMUXER (MPEGVIDEO,        mpegvideo);
-    REGISTER_MUXDEMUX(MPJPEG,           mpjpeg);
-    REGISTER_DEMUXER (MPL2,             mpl2);
-    REGISTER_DEMUXER (MPSUB,            mpsub);
-    REGISTER_DEMUXER (MSF,              msf);
-    REGISTER_DEMUXER (MSNWC_TCP,        msnwc_tcp);
-    REGISTER_DEMUXER (MTAF,             mtaf);
-    REGISTER_DEMUXER (MTV,              mtv);
-    REGISTER_DEMUXER (MUSX,             musx);
-    REGISTER_DEMUXER (MV,               mv);
-    REGISTER_DEMUXER (MVI,              mvi);
-    REGISTER_MUXDEMUX(MXF,              mxf);
-    REGISTER_MUXER   (MXF_D10,          mxf_d10);
-    REGISTER_MUXER   (MXF_OPATOM,       mxf_opatom);
-    REGISTER_DEMUXER (MXG,              mxg);
-    REGISTER_DEMUXER (NC,               nc);
-    REGISTER_DEMUXER (NISTSPHERE,       nistsphere);
-    REGISTER_DEMUXER (NSP,              nsp);
-    REGISTER_DEMUXER (NSV,              nsv);
-    REGISTER_MUXER   (NULL,             null);
-    REGISTER_MUXDEMUX(NUT,              nut);
-    REGISTER_DEMUXER (NUV,              nuv);
-    REGISTER_MUXER   (OGA,              oga);
-    REGISTER_MUXDEMUX(OGG,              ogg);
-    REGISTER_MUXER   (OGV,              ogv);
-    REGISTER_MUXDEMUX(OMA,              oma);
-    REGISTER_MUXER   (OPUS,             opus);
-    REGISTER_DEMUXER (PAF,              paf);
-    REGISTER_MUXDEMUX(PCM_ALAW,         pcm_alaw);
-    REGISTER_MUXDEMUX(PCM_MULAW,        pcm_mulaw);
-    REGISTER_MUXDEMUX(PCM_F64BE,        pcm_f64be);
-    REGISTER_MUXDEMUX(PCM_F64LE,        pcm_f64le);
-    REGISTER_MUXDEMUX(PCM_F32BE,        pcm_f32be);
-    REGISTER_MUXDEMUX(PCM_F32LE,        pcm_f32le);
-    REGISTER_MUXDEMUX(PCM_S32BE,        pcm_s32be);
-    REGISTER_MUXDEMUX(PCM_S32LE,        pcm_s32le);
-    REGISTER_MUXDEMUX(PCM_S24BE,        pcm_s24be);
-    REGISTER_MUXDEMUX(PCM_S24LE,        pcm_s24le);
-    REGISTER_MUXDEMUX(PCM_S16BE,        pcm_s16be);
-    REGISTER_MUXDEMUX(PCM_S16LE,        pcm_s16le);
-    REGISTER_MUXDEMUX(PCM_S8,           pcm_s8);
-    REGISTER_MUXDEMUX(PCM_U32BE,        pcm_u32be);
-    REGISTER_MUXDEMUX(PCM_U32LE,        pcm_u32le);
-    REGISTER_MUXDEMUX(PCM_U24BE,        pcm_u24be);
-    REGISTER_MUXDEMUX(PCM_U24LE,        pcm_u24le);
-    REGISTER_MUXDEMUX(PCM_U16BE,        pcm_u16be);
-    REGISTER_MUXDEMUX(PCM_U16LE,        pcm_u16le);
-    REGISTER_MUXDEMUX(PCM_U8,           pcm_u8);
-    REGISTER_DEMUXER (PJS,              pjs);
-    REGISTER_DEMUXER (PMP,              pmp);
-    REGISTER_MUXER   (PSP,              psp);
-    REGISTER_DEMUXER (PVA,              pva);
-    REGISTER_DEMUXER (PVF,              pvf);
-    REGISTER_DEMUXER (QCP,              qcp);
-    REGISTER_DEMUXER (R3D,              r3d);
-    REGISTER_MUXDEMUX(RAWVIDEO,         rawvideo);
-    REGISTER_DEMUXER (REALTEXT,         realtext);
-    REGISTER_DEMUXER (REDSPARK,         redspark);
-    REGISTER_DEMUXER (RL2,              rl2);
-    REGISTER_MUXDEMUX(RM,               rm);
-    REGISTER_MUXDEMUX(ROQ,              roq);
-    REGISTER_DEMUXER (RPL,              rpl);
-    REGISTER_DEMUXER (RSD,              rsd);
-    REGISTER_MUXDEMUX(RSO,              rso);
-    REGISTER_MUXDEMUX(RTP,              rtp);
-    REGISTER_MUXER   (RTP_MPEGTS,       rtp_mpegts);
-    REGISTER_MUXDEMUX(RTSP,             rtsp);
-    REGISTER_DEMUXER (S337M,            s337m);
-    REGISTER_DEMUXER (SAMI,             sami);
-    REGISTER_MUXDEMUX(SAP,              sap);
-    REGISTER_DEMUXER (SBG,              sbg);
-    REGISTER_MUXDEMUX(SCC,              scc);
-    REGISTER_DEMUXER (SDP,              sdp);
-    REGISTER_DEMUXER (SDR2,             sdr2);
-    REGISTER_DEMUXER (SDS,              sds);
-    REGISTER_DEMUXER (SDX,              sdx);
-    REGISTER_DEMUXER (SEGAFILM,         segafilm);
-    REGISTER_MUXER   (SEGMENT,          segment);
-    REGISTER_MUXER   (SEGMENT,          stream_segment);
-    REGISTER_DEMUXER (SHORTEN,          shorten);
-    REGISTER_DEMUXER (SIFF,             siff);
-    REGISTER_MUXER   (SINGLEJPEG,       singlejpeg);
-    REGISTER_DEMUXER (SLN,              sln);
-    REGISTER_DEMUXER (SMACKER,          smacker);
-    REGISTER_MUXDEMUX(SMJPEG,           smjpeg);
-    REGISTER_MUXER   (SMOOTHSTREAMING,  smoothstreaming);
-    REGISTER_DEMUXER (SMUSH,            smush);
-    REGISTER_DEMUXER (SOL,              sol);
-    REGISTER_MUXDEMUX(SOX,              sox);
-    REGISTER_MUXER   (SPX,              spx);
-    REGISTER_MUXDEMUX(SPDIF,            spdif);
-    REGISTER_MUXDEMUX(SRT,              srt);
-    REGISTER_DEMUXER (STR,              str);
-    REGISTER_DEMUXER (STL,              stl);
-    REGISTER_DEMUXER (SUBVIEWER1,       subviewer1);
-    REGISTER_DEMUXER (SUBVIEWER,        subviewer);
-    REGISTER_MUXDEMUX(SUP,              sup);
-    REGISTER_DEMUXER (SVAG,             svag);
-    REGISTER_MUXDEMUX(SWF,              swf);
-    REGISTER_DEMUXER (TAK,              tak);
-    REGISTER_MUXER   (TEE,              tee);
-    REGISTER_DEMUXER (TEDCAPTIONS,      tedcaptions);
-    REGISTER_MUXER   (TG2,              tg2);
-    REGISTER_MUXER   (TGP,              tgp);
-    REGISTER_DEMUXER (THP,              thp);
-    REGISTER_DEMUXER (THREEDOSTR,       threedostr);
-    REGISTER_DEMUXER (TIERTEXSEQ,       tiertexseq);
-    REGISTER_MUXER   (MKVTIMESTAMP_V2,  mkvtimestamp_v2);
-    REGISTER_DEMUXER (TMV,              tmv);
-    REGISTER_MUXDEMUX(TRUEHD,           truehd);
-    REGISTER_MUXDEMUX(TTA,              tta);
-    REGISTER_DEMUXER (TXD,              txd);
-    REGISTER_DEMUXER (TTY,              tty);
-    REGISTER_DEMUXER (TY,               ty);
-    REGISTER_MUXER   (UNCODEDFRAMECRC,  uncodedframecrc);
-    REGISTER_DEMUXER (V210,             v210);
-    REGISTER_DEMUXER (V210X,            v210x);
-    REGISTER_DEMUXER (VAG,              vag);
-    REGISTER_MUXDEMUX(VC1,              vc1);
-    REGISTER_MUXDEMUX(VC1T,             vc1t);
-    REGISTER_DEMUXER (VIVO,             vivo);
-    REGISTER_DEMUXER (VMD,              vmd);
-    REGISTER_DEMUXER (VOBSUB,           vobsub);
-    REGISTER_MUXDEMUX(VOC,              voc);
-    REGISTER_DEMUXER (VPK,              vpk);
-    REGISTER_DEMUXER (VPLAYER,          vplayer);
-    REGISTER_DEMUXER (VQF,              vqf);
-    REGISTER_MUXDEMUX(W64,              w64);
-    REGISTER_MUXDEMUX(WAV,              wav);
-    REGISTER_DEMUXER (WC3,              wc3);
-    REGISTER_MUXER   (WEBM,             webm);
-    REGISTER_MUXDEMUX(WEBM_DASH_MANIFEST, webm_dash_manifest);
-    REGISTER_MUXER   (WEBM_CHUNK,       webm_chunk);
-    REGISTER_MUXER   (WEBP,             webp);
-    REGISTER_MUXDEMUX(WEBVTT,           webvtt);
-    REGISTER_DEMUXER (WSAUD,            wsaud);
-    REGISTER_DEMUXER (WSD,              wsd);
-    REGISTER_DEMUXER (WSVQA,            wsvqa);
-    REGISTER_MUXDEMUX(WTV,              wtv);
-    REGISTER_DEMUXER (WVE,              wve);
-    REGISTER_MUXDEMUX(WV,               wv);
-    REGISTER_DEMUXER (XA,               xa);
-    REGISTER_DEMUXER (XBIN,             xbin);
-    REGISTER_DEMUXER (XMV,              xmv);
-    REGISTER_DEMUXER (XVAG,             xvag);
-    REGISTER_DEMUXER (XWMA,             xwma);
-    REGISTER_DEMUXER (YOP,              yop);
-    REGISTER_MUXDEMUX(YUV4MPEGPIPE,     yuv4mpegpipe);
+const AVInputFormat *av_demuxer_iterate(void **opaque){
+    uintptr_t i = (uintptr_t)*opaque;
+    const AVInputFormat *f = demuxer_list[i];
 
-    /* image demuxers */
-    REGISTER_DEMUXER (IMAGE_BMP_PIPE,        image_bmp_pipe);
-    REGISTER_DEMUXER (IMAGE_DDS_PIPE,        image_dds_pipe);
-    REGISTER_DEMUXER (IMAGE_DPX_PIPE,        image_dpx_pipe);
-    REGISTER_DEMUXER (IMAGE_EXR_PIPE,        image_exr_pipe);
-    REGISTER_DEMUXER (IMAGE_J2K_PIPE,        image_j2k_pipe);
-    REGISTER_DEMUXER (IMAGE_JPEG_PIPE,       image_jpeg_pipe);
-    REGISTER_DEMUXER (IMAGE_JPEGLS_PIPE,     image_jpegls_pipe);
-    REGISTER_DEMUXER (IMAGE_PAM_PIPE,        image_pam_pipe);
-    REGISTER_DEMUXER (IMAGE_PBM_PIPE,        image_pbm_pipe);
-    REGISTER_DEMUXER (IMAGE_PCX_PIPE,        image_pcx_pipe);
-    REGISTER_DEMUXER (IMAGE_PGMYUV_PIPE,     image_pgmyuv_pipe);
-    REGISTER_DEMUXER (IMAGE_PGM_PIPE,        image_pgm_pipe);
-    REGISTER_DEMUXER (IMAGE_PICTOR_PIPE,     image_pictor_pipe);
-    REGISTER_DEMUXER (IMAGE_PNG_PIPE,        image_png_pipe);
-    REGISTER_DEMUXER (IMAGE_PPM_PIPE,        image_ppm_pipe);
-    REGISTER_DEMUXER (IMAGE_PSD_PIPE,        image_psd_pipe);
-    REGISTER_DEMUXER (IMAGE_QDRAW_PIPE,      image_qdraw_pipe);
-    REGISTER_DEMUXER (IMAGE_SGI_PIPE,        image_sgi_pipe);
-    REGISTER_DEMUXER (IMAGE_SVG_PIPE,        image_svg_pipe);
-    REGISTER_DEMUXER (IMAGE_SUNRAST_PIPE,    image_sunrast_pipe);
-    REGISTER_DEMUXER (IMAGE_TIFF_PIPE,       image_tiff_pipe);
-    REGISTER_DEMUXER (IMAGE_WEBP_PIPE,       image_webp_pipe);
-    REGISTER_DEMUXER (IMAGE_XPM_PIPE,        image_xpm_pipe);
+    if (f)
+        *opaque = (void*)(i + 1);
+    return f;
+}
+
+#if FF_API_NEXT
+FF_DISABLE_DEPRECATION_WARNINGS
+static AVOnce av_format_next_init = AV_ONCE_INIT;
 
-    /* external libraries */
-    REGISTER_MUXER   (CHROMAPRINT,      chromaprint);
-    REGISTER_DEMUXER (LIBGME,           libgme);
-    REGISTER_DEMUXER (LIBMODPLUG,       libmodplug);
-    REGISTER_DEMUXER (LIBOPENMPT,       libopenmpt);
+static void av_format_init_next(void)
+{
+    AVOutputFormat *prevout = NULL, *out;
+    AVInputFormat *previn = NULL, *in;
+    void *i = 0;
+
+    while ((out = (AVOutputFormat*)av_muxer_iterate(&i))) {
+        if (prevout)
+            prevout->next = out;
+        prevout = out;
+    }
+
+    i = 0;
+    while ((in = (AVInputFormat*)av_demuxer_iterate(&i))) {
+        if (previn)
+            previn->next = in;
+        previn = in;
+    }
+}
+
+AVInputFormat *av_iformat_next(const AVInputFormat *f)
+{
+    ff_thread_once(&av_format_next_init, av_format_init_next);
+    if (f)
+        return f->next;
+    else
+        return demuxer_list[0];
+}
+
+AVOutputFormat *av_oformat_next(const AVOutputFormat *f)
+{
+    ff_thread_once(&av_format_next_init, av_format_init_next);
+    if (f)
+        return f->next;
+    else
+        return muxer_list[0];
 }
 
 void av_register_all(void)
 {
-    static AVOnce control = AV_ONCE_INIT;
+    ff_thread_once(&av_format_next_init, av_format_init_next);
+}
 
-    ff_thread_once(&control, register_all);
+void av_register_input_format(AVInputFormat *format)
+{
+    ff_thread_once(&av_format_next_init, av_format_init_next);
+}
+
+void av_register_output_format(AVOutputFormat *format)
+{
+    ff_thread_once(&av_format_next_init, av_format_init_next);
 }
+FF_ENABLE_DEPRECATION_WARNINGS
+#endif
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index 82f9845..4ea1b5a 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -2011,6 +2011,7 @@  const char *avformat_configuration(void);
  */
 const char *avformat_license(void);
 
+#if FF_API_NEXT
 /**
  * Initialize libavformat and register all the muxers, demuxers and
  * protocols. If you do not call this function, then you can select
@@ -2019,10 +2020,14 @@  const char *avformat_license(void);
  * @see av_register_input_format()
  * @see av_register_output_format()
  */
+attribute_deprecated
 void av_register_all(void);
 
+attribute_deprecated
 void av_register_input_format(AVInputFormat *format);
+attribute_deprecated
 void av_register_output_format(AVOutputFormat *format);
+#endif
 
 /**
  * Do global initialization of network libraries. This is optional,
@@ -2046,11 +2051,13 @@  int avformat_network_init(void);
  */
 int avformat_network_deinit(void);
 
+#if FF_API_NEXT
 /**
  * If f is NULL, returns the first registered input format,
  * if f is non-NULL, returns the next registered input format after f
  * or NULL if f is the last one.
  */
+attribute_deprecated
 AVInputFormat  *av_iformat_next(const AVInputFormat  *f);
 
 /**
@@ -2058,7 +2065,31 @@  AVInputFormat  *av_iformat_next(const AVInputFormat  *f);
  * if f is non-NULL, returns the next registered output format after f
  * or NULL if f is the last one.
  */
+attribute_deprecated
 AVOutputFormat *av_oformat_next(const AVOutputFormat *f);
+#endif
+
+/**
+ * Iterate over all registered muxers.
+ *
+ * @param opaque a pointer where libavformat will store the iteration state. Must
+ *               point to NULL to start the iteration.
+ *
+ * @return the next registered muxer or NULL when the iteration is
+ *         finished
+ */
+const AVOutputFormat *av_muxer_iterate(void **opaque);
+
+/**
+ * Iterate over all registered demuxers.
+ *
+ * @param opaque a pointer where libavformat will store the iteration state. Must
+ *               point to NULL to start the iteration.
+ *
+ * @return the next registered demuxer or NULL when the iteration is
+ *         finished
+ */
+const AVInputFormat *av_demuxer_iterate(void **opaque);
 
 /**
  * Allocate an AVFormatContext.
diff --git a/libavformat/format.c b/libavformat/format.c
index 759b5b1..608af1b 100644
--- a/libavformat/format.c
+++ b/libavformat/format.c
@@ -34,65 +34,6 @@ 
  * @file
  * Format register and lookup
  */
-/** head of registered input format linked list */
-static AVInputFormat *first_iformat = NULL;
-/** head of registered output format linked list */
-static AVOutputFormat *first_oformat = NULL;
-
-static AVInputFormat **last_iformat = &first_iformat;
-static AVOutputFormat **last_oformat = &first_oformat;
-
-AVInputFormat *av_iformat_next(const AVInputFormat *f)
-{
-    if (f)
-        return f->next;
-    else
-        return first_iformat;
-}
-
-AVOutputFormat *av_oformat_next(const AVOutputFormat *f)
-{
-    if (f)
-        return f->next;
-    else
-        return first_oformat;
-}
-
-static AVMutex iformat_register_mutex = AV_MUTEX_INITIALIZER;
-
-void av_register_input_format(AVInputFormat *format)
-{
-    AVInputFormat **p;
-
-    ff_mutex_lock(&iformat_register_mutex);
-    p = last_iformat;
-
-    while (*p)
-        p = &(*p)->next;
-    *p = format;
-    format->next = NULL;
-    last_iformat = &format->next;
-
-    ff_mutex_unlock(&iformat_register_mutex);
-}
-
-static AVMutex oformat_register_mutex = AV_MUTEX_INITIALIZER;
-
-void av_register_output_format(AVOutputFormat *format)
-{
-    AVOutputFormat **p;
-
-    ff_mutex_lock(&oformat_register_mutex);
-    p = last_oformat;
-
-    while (*p)
-        p = &(*p)->next;
-    *p = format;
-    format->next = NULL;
-    last_oformat = &format->next;
-
-    ff_mutex_unlock(&oformat_register_mutex);
-}
 
 int av_match_ext(const char *filename, const char *extensions)
 {
@@ -111,6 +52,7 @@  AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
                                 const char *mime_type)
 {
     AVOutputFormat *fmt = NULL, *fmt_found;
+    void *i = 0;
     int score_max, score;
 
     /* specific test for image sequences */
@@ -124,7 +66,7 @@  AVOutputFormat *av_guess_format(const char *short_name, const char *filename,
     /* Find the proper file type. */
     fmt_found = NULL;
     score_max = 0;
-    while ((fmt = av_oformat_next(fmt))) {
+    while ((fmt = av_muxer_iterate(&i))) {
         score = 0;
         if (fmt->name && short_name && av_match_name(short_name, fmt->name))
             score += 100;
@@ -176,7 +118,8 @@  enum AVCodecID av_guess_codec(AVOutputFormat *fmt, const char *short_name,
 AVInputFormat *av_find_input_format(const char *short_name)
 {
     AVInputFormat *fmt = NULL;
-    while ((fmt = av_iformat_next(fmt)))
+    void *i = 0;
+    while ((fmt = av_demuxer_iterate(&i)))
         if (av_match_name(short_name, fmt->name))
             return fmt;
     return NULL;
@@ -188,6 +131,7 @@  AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened,
     AVProbeData lpd = *pd;
     AVInputFormat *fmt1 = NULL, *fmt;
     int score, score_max = 0;
+    void *i = 0;
     const static uint8_t zerobuffer[AVPROBE_PADDING_SIZE];
     enum nodat {
         NO_ID3,
@@ -213,7 +157,7 @@  AVInputFormat *av_probe_input_format3(AVProbeData *pd, int is_opened,
     }
 
     fmt = NULL;
-    while ((fmt1 = av_iformat_next(fmt1))) {
+    while ((fmt1 = av_demuxer_iterate(&i))) {
         if (!is_opened == !(fmt1->flags & AVFMT_NOFILE) && strcmp(fmt1->name, "image2"))
             continue;
         score = 0;
diff --git a/libavformat/version.h b/libavformat/version.h
index 897be0c..293f697 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -88,6 +88,9 @@ 
 #ifndef FF_API_FORMAT_FILENAME
 #define FF_API_FORMAT_FILENAME          (LIBAVFORMAT_VERSION_MAJOR < 59)
 #endif
+#ifndef FF_API_NEXT
+#define FF_API_NEXT                     (LIBAVFORMAT_VERSION_MAJOR < 59)
+#endif
 
 
 #ifndef FF_API_R_FRAME_RATE