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31 Oct 2022 00:27:33 -0700 From: wenbin.chen-at-intel.com@ffmpeg.org To: ffmpeg-devel@ffmpeg.org Date: Mon, 31 Oct 2022 15:22:25 +0800 Message-Id: <20221031072225.432824-1-wenbin.chen@intel.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Subject: [FFmpeg-devel] [PATCH] doc/examples: Add qsv_transcode example X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" X-TUID: VfTouS4qriC7 From: Wenbin Chen Add qsv_transcode example which shows how to use qsv to do hardware accelerated transcoding, also show how to dynamically set encoding parameters. examples: Normal usage: qsv_transcode input.mp4 h264_qsv output.mp4 "g 60" Dynamic setting usage: qsv_transcode input.mp4 hevc_qsv output.mp4 "g 60 asyne_depth 1" 100 "g 120" This command initializes codec with gop_size 60 and change it to 120 after 100 frames Signed-off-by: Wenbin Chen --- configure | 2 + doc/examples/.gitignore | 1 + doc/examples/Makefile | 1 + doc/examples/qsv_transcode.c | 440 +++++++++++++++++++++++++++++++++++ 4 files changed, 444 insertions(+) create mode 100644 doc/examples/qsv_transcode.c diff --git a/configure b/configure index 70c9e41dcc..a8b4496465 100755 --- a/configure +++ b/configure @@ -1748,6 +1748,7 @@ EXAMPLE_LIST=" transcoding_example vaapi_encode_example vaapi_transcode_example + qsv_transcode_example " EXTERNAL_AUTODETECT_LIBRARY_LIST=" @@ -3811,6 +3812,7 @@ transcode_aac_example_deps="avcodec avformat swresample" transcoding_example_deps="avfilter avcodec avformat avutil" vaapi_encode_example_deps="avcodec avutil h264_vaapi_encoder" vaapi_transcode_example_deps="avcodec avformat avutil h264_vaapi_encoder" +qsv_transcode_example_deps="avcodec avformat avutil h264_qsv_encoder" # EXTRALIBS_LIST cpu_init_extralibs="pthreads_extralibs" diff --git a/doc/examples/.gitignore b/doc/examples/.gitignore index 44960e1de7..d787afdd4c 100644 --- a/doc/examples/.gitignore +++ b/doc/examples/.gitignore @@ -22,3 +22,4 @@ /transcoding /vaapi_encode /vaapi_transcode +/qsv_transcode diff --git a/doc/examples/Makefile b/doc/examples/Makefile index 81bfd34d5d..f937fbefda 100644 --- a/doc/examples/Makefile +++ b/doc/examples/Makefile @@ -21,6 +21,7 @@ EXAMPLES-$(CONFIG_TRANSCODE_AAC_EXAMPLE) += transcode_aac EXAMPLES-$(CONFIG_TRANSCODING_EXAMPLE) += transcoding EXAMPLES-$(CONFIG_VAAPI_ENCODE_EXAMPLE) += vaapi_encode EXAMPLES-$(CONFIG_VAAPI_TRANSCODE_EXAMPLE) += vaapi_transcode +EXAMPLES-$(CONFIG_QSV_TRANSCODE_EXAMPLE) += qsv_transcode EXAMPLES := $(EXAMPLES-yes:%=doc/examples/%$(PROGSSUF)$(EXESUF)) EXAMPLES_G := $(EXAMPLES-yes:%=doc/examples/%$(PROGSSUF)_g$(EXESUF)) diff --git a/doc/examples/qsv_transcode.c b/doc/examples/qsv_transcode.c new file mode 100644 index 0000000000..9b37bbea9f --- /dev/null +++ b/doc/examples/qsv_transcode.c @@ -0,0 +1,440 @@ +/* + * Quick Sync Video (video transcoding) transcode sample + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +/** + * @file + * Intel QSV-accelerated transcoding example. + * + * @example qsv_transcode.c + * This example shows how to do QSV-accelerated transcoding and how to + * dynamically change encoder's option. + * Usage: qsv_transcode input_stream codec output_stream initial option + * { frame_number new_option } + * e.g: - qsv_transcode input.mp4 h264_qsv output_h264.mp4 "g 60" + * - qsv_transcode input.mp4 hevc_qsv output_hevc.mp4 "g 60 async_depth 1" + * 100 "g 120" + * (initialize codec with gop_size 60 and change it to 120 after 100 + * frames) + */ + +#include +#include + +#include +#include +#include +#include + +static AVFormatContext *ifmt_ctx = NULL, *ofmt_ctx = NULL; +static AVBufferRef *hw_device_ctx = NULL; +static AVCodecContext *decoder_ctx = NULL, *encoder_ctx = NULL; +static int video_stream = -1; + +typedef struct DynamicSetting { + int frame_number; + char* optstr; +} DynamicSetting; +static DynamicSetting *dynamic_setting; +static int setting_number; +static int current_setting_number; + +static int str_to_dict(char* optstr, AVDictionary **opt) +{ + char *key, *value; + if (strlen(optstr) == 0) + return 0; + key = strtok(optstr, " "); + if (key == NULL) + return AVERROR(ENAVAIL); + value = strtok(NULL, " "); + if (value == NULL) + return AVERROR(ENAVAIL); + av_dict_set(opt, key, value, 0); + do { + key = strtok(NULL, " "); + if (key == NULL) + return 0; + value = strtok(NULL, " "); + if (value == NULL) + return AVERROR(ENAVAIL); + av_dict_set(opt, key, value, 0); + } while(key != NULL); + return 0; +} + +static int dynamic_set_parameter(AVCodecContext *avctx) +{ + AVDictionary *opts = NULL; + int ret = 0; + static int frame_number = 0; + frame_number++; + if (current_setting_number < setting_number && + frame_number == dynamic_setting[current_setting_number].frame_number) { + AVDictionaryEntry *e = NULL; + ret = str_to_dict(dynamic_setting[current_setting_number].optstr, &opts); + if (ret < 0) { + fprintf(stderr, "The dynamic parameter is wrong\n"); + goto fail; + } + /* Set common option. The dictionary will be freed and replaced + * by a new one containing all options not found in common option list. + * Then this new dictionary is used to set private option. */ + if ((ret = av_opt_set_dict(avctx, &opts)) < 0) + goto fail; + /* Set codec specific option */ + if ((ret = av_opt_set_dict(avctx->priv_data, &opts)) < 0) + goto fail; + /* There is no "framerate" option in commom option list. Use "-r" to set + * framerate, which is compatible with ffmpeg commandline. The video is + * assumed to be average frame rate, so set time_base to 1/framerate. */ + e = av_dict_get(opts, "r", NULL, 0); + if (e) { + avctx->framerate = av_d2q(atof(e->value), INT_MAX); + encoder_ctx->time_base = av_inv_q(encoder_ctx->framerate); + } + } +fail: + av_dict_free(&opts); + return ret; +} + +static int get_format(AVCodecContext *avctx, const enum AVPixelFormat *pix_fmts) +{ + while (*pix_fmts != AV_PIX_FMT_NONE) { + if (*pix_fmts == AV_PIX_FMT_QSV) { + return AV_PIX_FMT_QSV; + } + + pix_fmts++; + } + + fprintf(stderr, "The QSV pixel format not offered in get_format()\n"); + + return AV_PIX_FMT_NONE; +} + +static int open_input_file(char *filename) +{ + int ret; + const AVCodec *decoder = NULL; + AVStream *video = NULL; + + if ((ret = avformat_open_input(&ifmt_ctx, filename, NULL, NULL)) < 0) { + fprintf(stderr, "Cannot open input file '%s', Error code: %s\n", + filename, av_err2str(ret)); + return ret; + } + + if ((ret = avformat_find_stream_info(ifmt_ctx, NULL)) < 0) { + fprintf(stderr, "Cannot find input stream information. Error code: %s\n", + av_err2str(ret)); + return ret; + } + + ret = av_find_best_stream(ifmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0); + if (ret < 0) { + fprintf(stderr, "Cannot find a video stream in the input file. " + "Error code: %s\n", av_err2str(ret)); + return ret; + } + video_stream = ret; + video = ifmt_ctx->streams[video_stream]; + + switch(video->codecpar->codec_id) { + case AV_CODEC_ID_H264: + decoder = avcodec_find_decoder_by_name("h264_qsv"); + break; + case AV_CODEC_ID_HEVC: + decoder = avcodec_find_decoder_by_name("hevc_qsv"); + break; + case AV_CODEC_ID_VP9: + decoder = avcodec_find_decoder_by_name("vp9_qsv"); + break; + case AV_CODEC_ID_VP8: + decoder = avcodec_find_decoder_by_name("vp8_qsv"); + break; + case AV_CODEC_ID_AV1: + decoder = avcodec_find_decoder_by_name("av1_qsv"); + break; + case AV_CODEC_ID_MPEG2VIDEO: + decoder = avcodec_find_decoder_by_name("mpeg2_qsv"); + break; + case AV_CODEC_ID_MJPEG: + decoder = avcodec_find_decoder_by_name("mjpeg_qsv"); + break; + default: + fprintf(stderr, "Codec is not supportted by qsv\n"); + return AVERROR(ENAVAIL); + } + + if (!(decoder_ctx = avcodec_alloc_context3(decoder))) + return AVERROR(ENOMEM); + + if ((ret = avcodec_parameters_to_context(decoder_ctx, video->codecpar)) < 0) { + fprintf(stderr, "avcodec_parameters_to_context error. Error code: %s\n", + av_err2str(ret)); + return ret; + } + decoder_ctx->framerate = av_guess_frame_rate(ifmt_ctx, video, NULL); + + decoder_ctx->hw_device_ctx = av_buffer_ref(hw_device_ctx); + if (!decoder_ctx->hw_device_ctx) { + fprintf(stderr, "A hardware device reference create failed.\n"); + return AVERROR(ENOMEM); + } + decoder_ctx->get_format = get_format; + decoder_ctx->pkt_timebase = video->time_base; + if ((ret = avcodec_open2(decoder_ctx, decoder, NULL)) < 0) + fprintf(stderr, "Failed to open codec for decoding. Error code: %s\n", + av_err2str(ret)); + + return ret; +} + +static int encode_write(AVPacket *enc_pkt, AVFrame *frame) +{ + int ret = 0; + + av_packet_unref(enc_pkt); + + if((ret = dynamic_set_parameter(encoder_ctx)) < 0) { + fprintf(stderr, "Failed to set dynamic parameter. Error code: %s\n", + av_err2str(ret)); + goto end; + } + + if ((ret = avcodec_send_frame(encoder_ctx, frame)) < 0) { + fprintf(stderr, "Error during encoding. Error code: %s\n", av_err2str(ret)); + goto end; + } + while (1) { + if (ret = avcodec_receive_packet(encoder_ctx, enc_pkt)) + break; + enc_pkt->stream_index = 0; + av_packet_rescale_ts(enc_pkt, encoder_ctx->time_base, + ofmt_ctx->streams[0]->time_base); + if ((ret = av_interleaved_write_frame(ofmt_ctx, enc_pkt)) < 0) { + fprintf(stderr, "Error during writing data to output file. " + "Error code: %s\n", av_err2str(ret)); + return ret; + } + } + +end: + if (ret == AVERROR_EOF) + return 0; + ret = ((ret == AVERROR(EAGAIN)) ? 0:-1); + return ret; +} + +static int dec_enc(AVPacket *pkt, const AVCodec *enc_codec, char *optstr) +{ + AVFrame *frame; + int ret = 0; + + ret = avcodec_send_packet(decoder_ctx, pkt); + if (ret < 0) { + fprintf(stderr, "Error during decoding. Error code: %s\n", av_err2str(ret)); + return ret; + } + + while (ret >= 0) { + if (!(frame = av_frame_alloc())) + return AVERROR(ENOMEM); + + ret = avcodec_receive_frame(decoder_ctx, frame); + if (ret == AVERROR(EAGAIN) || ret == AVERROR_EOF) { + av_frame_free(&frame); + return 0; + } else if (ret < 0) { + fprintf(stderr, "Error while decoding. Error code: %s\n", av_err2str(ret)); + goto fail; + } + if (!encoder_ctx->hw_frames_ctx) { + AVDictionaryEntry *e = NULL; + AVDictionary *opts = NULL; + AVStream *ost; + /* we need to ref hw_frames_ctx of decoder to initialize encoder's codec. + Only after we get a decoded frame, can we obtain its hw_frames_ctx */ + encoder_ctx->hw_frames_ctx = av_buffer_ref(decoder_ctx->hw_frames_ctx); + if (!encoder_ctx->hw_frames_ctx) { + ret = AVERROR(ENOMEM); + goto fail; + } + /* set AVCodecContext Parameters for encoder, here we keep them stay + * the same as decoder. + */ + encoder_ctx->time_base = av_inv_q(decoder_ctx->framerate); + encoder_ctx->pix_fmt = AV_PIX_FMT_QSV; + encoder_ctx->width = decoder_ctx->width; + encoder_ctx->height = decoder_ctx->height; + if ((ret = str_to_dict(optstr, &opts)) < 0) { + fprintf(stderr, "Failed to set encoding parameter.\n"); + goto fail; + } + /* There is no "framerate" option in commom option list. Use "-r" to + * set framerate, which is compatible with ffmpeg commandline. The + * video is assumed to be average frame rate, so set time_base to + * 1/framerate. */ + e = av_dict_get(opts, "r", NULL, 0); + if (e) { + encoder_ctx->framerate = av_d2q(atof(e->value), INT_MAX); + encoder_ctx->time_base = av_inv_q(encoder_ctx->framerate); + } + if ((ret = avcodec_open2(encoder_ctx, enc_codec, &opts)) < 0) { + fprintf(stderr, "Failed to open encode codec. Error code: %s\n", + av_err2str(ret)); + av_dict_free(&opts); + goto fail; + } + av_dict_free(&opts); + + if (!(ost = avformat_new_stream(ofmt_ctx, enc_codec))) { + fprintf(stderr, "Failed to allocate stream for output format.\n"); + ret = AVERROR(ENOMEM); + goto fail; + } + + ost->time_base = encoder_ctx->time_base; + ret = avcodec_parameters_from_context(ost->codecpar, encoder_ctx); + if (ret < 0) { + fprintf(stderr, "Failed to copy the stream parameters. " + "Error code: %s\n", av_err2str(ret)); + goto fail; + } + + /* write the stream header */ + if ((ret = avformat_write_header(ofmt_ctx, NULL)) < 0) { + fprintf(stderr, "Error while writing stream header. " + "Error code: %s\n", av_err2str(ret)); + goto fail; + } + } + frame->pts = av_rescale_q(frame->pts, decoder_ctx->pkt_timebase, + encoder_ctx->time_base); + if ((ret = encode_write(pkt, frame)) < 0) + fprintf(stderr, "Error during encoding and writing.\n"); + +fail: + av_frame_free(&frame); + if (ret < 0) + return ret; + } + return 0; +} + +int main(int argc, char **argv) +{ + const AVCodec *enc_codec; + int ret = 0; + AVPacket *dec_pkt; + + if (argc < 5 || (argc - 5) % 2) { + av_log(NULL, AV_LOG_ERROR, "Usage: %s " + " <\"encoding option set 0\"> [ <\"encoding options set 1\">]...\n", argv[0]); + return 1; + } + setting_number = (argc - 5) / 2; + dynamic_setting = av_malloc(setting_number * sizeof(*dynamic_setting)); + current_setting_number = 0; + for (int i = 0; i < setting_number; i++) { + dynamic_setting[i].frame_number = atoi(argv[i*2 + 5]); + dynamic_setting[i].optstr = argv[i*2 + 6]; + } + + ret = av_hwdevice_ctx_create(&hw_device_ctx, AV_HWDEVICE_TYPE_QSV, NULL, NULL, 0); + if (ret < 0) { + fprintf(stderr, "Failed to create a QSV device. Error code: %s\n", av_err2str(ret)); + goto end; + } + + dec_pkt = av_packet_alloc(); + if (!dec_pkt) { + fprintf(stderr, "Failed to allocate decode packet\n"); + goto end; + } + + if ((ret = open_input_file(argv[1])) < 0) + goto end; + + if (!(enc_codec = avcodec_find_encoder_by_name(argv[2]))) { + fprintf(stderr, "Could not find encoder '%s'\n", argv[2]); + ret = -1; + goto end; + } + + if ((ret = (avformat_alloc_output_context2(&ofmt_ctx, NULL, NULL, argv[3]))) < 0) { + fprintf(stderr, "Failed to deduce output format from file extension. Error code: " + "%s\n", av_err2str(ret)); + goto end; + } + + if (!(encoder_ctx = avcodec_alloc_context3(enc_codec))) { + ret = AVERROR(ENOMEM); + goto end; + } + + ret = avio_open(&ofmt_ctx->pb, argv[3], AVIO_FLAG_WRITE); + if (ret < 0) { + fprintf(stderr, "Cannot open output file. " + "Error code: %s\n", av_err2str(ret)); + goto end; + } + + /* read all packets and only transcoding video */ + while (ret >= 0) { + if ((ret = av_read_frame(ifmt_ctx, dec_pkt)) < 0) + break; + + if (video_stream == dec_pkt->stream_index) + ret = dec_enc(dec_pkt, enc_codec, argv[4]); + + av_packet_unref(dec_pkt); + } + + /* flush decoder */ + av_packet_unref(dec_pkt); + if ((ret = dec_enc(dec_pkt, enc_codec, argv[4])) < 0) { + fprintf(stderr, "Failed to flush decoder %s\n", av_err2str(ret)); + goto end; + } + + /* flush encoder */ + if ((ret = encode_write(dec_pkt, NULL)) < 0) { + fprintf(stderr, "Failed to flush encoder %s\n", av_err2str(ret)); + goto end; + } + + /* write the trailer for output stream */ + if ((ret = av_write_trailer(ofmt_ctx)) < 0) + fprintf(stderr, "Failed to write trailer %s\n", av_err2str(ret)); + +end: + avformat_close_input(&ifmt_ctx); + avformat_close_input(&ofmt_ctx); + avcodec_free_context(&decoder_ctx); + avcodec_free_context(&encoder_ctx); + av_buffer_unref(&hw_device_ctx); + av_packet_free(&dec_pkt); + av_freep(&dynamic_setting); + return ret; +}