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[73.110.121.59]) by smtp.gmail.com with ESMTPSA id 196sm4382274iou.50.2017.08.02.00.17.21 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Wed, 02 Aug 2017 00:17:21 -0700 (PDT) From: Rodger Combs To: ffmpeg-devel@ffmpeg.org Date: Wed, 2 Aug 2017 01:30:40 -0500 Message-Id: <1501655445-18976-2-git-send-email-rodger.combs@gmail.com> X-Mailer: git-send-email 2.6.4 In-Reply-To: <1501655445-18976-1-git-send-email-rodger.combs@gmail.com> References: <1501655445-18976-1-git-send-email-rodger.combs@gmail.com> Subject: [FFmpeg-devel] [PATCH 2/7] lavf/segment: add option to segment by chapter X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 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 MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" --- doc/muxers.texi | 6 +++++ libavformat/segment.c | 65 +++++++++++++++++++++++++++++++++++++++++++++++---- libavformat/version.h | 2 +- 3 files changed, 67 insertions(+), 6 deletions(-) diff --git a/doc/muxers.texi b/doc/muxers.texi index 94472ce..23ef2e7 100644 --- a/doc/muxers.texi +++ b/doc/muxers.texi @@ -1538,6 +1538,12 @@ This option specifies to start a new segment whenever a reference stream key frame is found and the sequential number (starting from 0) of the frame is greater or equal to the next value in the list. +@item segment_chapters @var{1|0} +Split each chapter into its own segment. Metadata from the chapters +will be written to the corresponding segments. If this option is selected +and the filename contains tokens in the format @code{$varname$}, they +will be replaced by the corresponding metadata values. + @item segment_wrap @var{limit} Wrap around segment index once it reaches @var{limit}. diff --git a/libavformat/segment.c b/libavformat/segment.c index 0e8bcdd..590f62b 100644 --- a/libavformat/segment.c +++ b/libavformat/segment.c @@ -106,6 +106,8 @@ typedef struct SegmentContext { int frame_count; ///< total number of reference frames int segment_frame_count; ///< number of reference frames in the segment + int split_chapters; ///< split on chapter markers + int64_t time_delta; int individual_header_trailer; /**< Set by a private option. */ int write_header_trailer; /**< Set by a private option. */ @@ -186,6 +188,43 @@ static int segment_mux_init(AVFormatContext *s) return 0; } +static int replace_variables(AVFormatContext *oc) +{ + char name[sizeof(oc->filename)]; + char *p = name; + char *out = oc->filename; + strncpy(name, oc->filename, sizeof(name)); + while (*p) { + char c = *p++; + if (c == '$') { + if (*p == '$') { + p++; + goto append; + } else { + int len; + const char *val; + const AVDictionaryEntry *e; + int end = strcspn(p, "$"); + if (p[end] == '\0') + continue; + p[end] = '\0'; + e = av_dict_get(oc->metadata, p, NULL, 0); + val = e ? e->value : "(unknown)"; + len = strlen(val); + strncpy(out, val, oc->filename + sizeof(oc->filename) - 1 - out); + out = FFMIN(oc->filename + sizeof(oc->filename) - 1, out + len); + p += end + 1; + } + } else { +append: + if (out - oc->filename < sizeof(oc->filename) - 1) + *out++ = c; + } + } + *out = '\0'; + return 0; +} + static int set_segment_filename(AVFormatContext *s) { SegmentContext *seg = s->priv_data; @@ -210,6 +249,9 @@ static int set_segment_filename(AVFormatContext *s) return AVERROR(EINVAL); } + if (seg->split_chapters) + replace_variables(oc); + /* copy modified name in list entry */ size = strlen(av_basename(oc->filename)) + 1; if (seg->entry_prefix) @@ -236,6 +278,8 @@ static int segment_start(AVFormatContext *s, int write_header) if ((err = segment_mux_init(s)) < 0) return err; oc = seg->avf; + if (seg->split_chapters && seg->segment_count < s->nb_chapters && (err = av_dict_copy(&oc->metadata, s->chapters[seg->segment_count]->metadata, 0)) < 0) + return err; } seg->segment_idx++; @@ -659,10 +703,14 @@ static int seg_init(AVFormatContext *s) "you can use output_ts_offset instead of it\n"); } - if (!!seg->time_str + !!seg->times_str + !!seg->frames_str > 1) { + if (seg->segment_idx < 0) + seg->segment_idx = seg->split_chapters; + + if (!!seg->time_str + !!seg->times_str + !!seg->frames_str + !!seg->split_chapters > 1) { av_log(s, AV_LOG_ERROR, - "segment_time, segment_times, and segment_frames options " - "are mutually exclusive, select just one of them\n"); + "segment_time, segment_times, segment_frames, and " + "segment_chapters options are mutually exclusive; " + "select just one of them\n"); return AVERROR(EINVAL); } @@ -672,7 +720,7 @@ static int seg_init(AVFormatContext *s) } else if (seg->frames_str) { if ((ret = parse_frames(s, &seg->frames, &seg->nb_frames, seg->frames_str)) < 0) return ret; - } else { + } else if (!seg->split_chapters) { /* set default value if not specified */ if (!seg->time_str) seg->time_str = av_strdup("2"); @@ -739,6 +787,9 @@ static int seg_init(AVFormatContext *s) if ((ret = segment_mux_init(s)) < 0) return ret; + if (seg->split_chapters && s->nb_chapters && (ret = av_dict_copy(&seg->avf->metadata, s->chapters[0]->metadata, 0)) < 0) + return ret; + if ((ret = set_segment_filename(s)) < 0) return ret; oc = seg->avf; @@ -860,6 +911,9 @@ calc_times: } else if (seg->frames) { start_frame = seg->segment_count < seg->nb_frames ? seg->frames[seg->segment_count] : INT_MAX; + } else if (seg->split_chapters) { + end_pts = seg->segment_count + 1 < s->nb_chapters ? + av_rescale_q(s->chapters[seg->segment_count]->end, s->chapters[seg->segment_count]->time_base, AV_TIME_BASE_Q) : INT64_MAX; } else { if (seg->use_clocktime) { int64_t avgt = av_gettime(); @@ -1042,9 +1096,10 @@ static const AVOption options[] = { { "segment_time_delta","set approximation value used for the segment times", OFFSET(time_delta), AV_OPT_TYPE_DURATION, {.i64 = 0}, 0, 0, E }, { "segment_times", "set segment split time points", OFFSET(times_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E }, { "segment_frames", "set segment split frame numbers", OFFSET(frames_str),AV_OPT_TYPE_STRING,{.str = NULL}, 0, 0, E }, + { "segment_chapters", "split segments on chapter markers", OFFSET(split_chapters), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E }, { "segment_wrap", "set number after which the index wraps", OFFSET(segment_idx_wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, { "segment_list_entry_prefix", "set base url prefix for segments", OFFSET(entry_prefix), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E }, - { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, + { "segment_start_number", "set the sequence number of the first segment", OFFSET(segment_idx), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, E }, { "segment_wrap_number", "set the number of wrap before the first segment", OFFSET(segment_idx_wrap_nb), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E }, { "strftime", "set filename expansion with strftime at segment creation", OFFSET(use_strftime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E }, { "increment_tc", "increment timecode between each segment", OFFSET(increment_tc), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E }, diff --git a/libavformat/version.h b/libavformat/version.h index a8cf4c1..4d12f5b 100644 --- a/libavformat/version.h +++ b/libavformat/version.h @@ -33,7 +33,7 @@ // Also please add any ticket numbers that you believe might be affected here #define LIBAVFORMAT_VERSION_MAJOR 57 #define LIBAVFORMAT_VERSION_MINOR 77 -#define LIBAVFORMAT_VERSION_MICRO 100 +#define LIBAVFORMAT_VERSION_MICRO 101 #define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \ LIBAVFORMAT_VERSION_MINOR, \