From: Bryce Chester Newman <bryce.newman@gettyimages.com> Export the poster_time_location if available. The poster_time_location is calculated using the poster_time / time_scale = X seconds. The value of poster_time_location indicates where in the video the poster frame is. Addresses feedback from https://www.mail-archive.com/ffmpeg-devel@ffmpeg.org/msg138122.html. Signed-off-by: Bryce Chester Newman bryce.newman@gettyimages.com --- libavformat/mov: Add support for exporting poster time. Export the poster_time_location if available. The poster_time_location is calculated using the poster_time / time_scale = X seconds. The value of poster_time_location indicates where in the video the poster frame is. Addresses feedback from https://www.mail-archive.com/ffmpeg-devel@ffmpeg.org/msg138122.html. Signed-off-by: Bryce Chester Newman bryce.newman@gettyimages.com Published-As: https://github.com/ffstaging/FFmpeg/releases/tag/pr-ffstaging-41%2Fbryceches... Fetch-It-Via: git fetch https://github.com/ffstaging/FFmpeg pr-ffstaging-41/brycechesternewman/add_poster_time_location_mov-v1 Pull-Request: https://github.com/ffstaging/FFmpeg/pull/41 doc/demuxers.texi | 6 ++++++ libavformat/isom.h | 1 + libavformat/mov.c | 13 +++++++++++-- 3 files changed, 18 insertions(+), 2 deletions(-) diff --git a/doc/demuxers.texi b/doc/demuxers.texi index 2b6dd86c2a..b1f4926c40 100644 --- a/doc/demuxers.texi +++ b/doc/demuxers.texi @@ -749,6 +749,12 @@ cast to int32 are used to adjust onward dts. Unit is the track time scale. Range is 0 to UINT_MAX. Default is @code{UINT_MAX - 48000*10} which allows upto a 10 second dts correction for 48 kHz audio streams while accommodating 99.9% of @code{uint32} range. + +@item poster_time_location +Export the poster_time_location if available. +The poster_time_location is calculated using the poster_time / time_scale = X seconds. +The value of poster_time_location indicates where in the video the poster frame is. +Default is false. @end table @subsection Audible AAX diff --git a/libavformat/isom.h b/libavformat/isom.h index 64fb7065d5..fb3d8d5618 100644 --- a/libavformat/isom.h +++ b/libavformat/isom.h @@ -326,6 +326,7 @@ typedef struct MOVContext { int64_t extent_offset; } *avif_info; int avif_info_size; + int poster_time_location; } MOVContext; int ff_mp4_read_descr_len(AVIOContext *pb); diff --git a/libavformat/mov.c b/libavformat/mov.c index 1f436e21d6..b914bbc96a 100644 --- a/libavformat/mov.c +++ b/libavformat/mov.c @@ -1501,6 +1501,7 @@ static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom) { int i; int64_t creation_time; + int32_t poster_time; int version = avio_r8(pb); /* version */ avio_rb24(pb); /* flags */ @@ -1535,12 +1536,20 @@ static int mov_read_mvhd(MOVContext *c, AVIOContext *pb, MOVAtom atom) avio_rb32(pb); /* preview time */ avio_rb32(pb); /* preview duration */ - avio_rb32(pb); /* poster time */ + poster_time = avio_rb32(pb); /* poster time */ avio_rb32(pb); /* selection time */ avio_rb32(pb); /* selection duration */ avio_rb32(pb); /* current time */ avio_rb32(pb); /* next track ID */ + if(c->poster_time_location && poster_time && c->time_scale && c->time_scale > 0) { + av_log(c->fc, AV_LOG_TRACE, "poster_time = %i, time_scale = %i\n", poster_time, c->time_scale); + char buffer[32]; + int poster_time_location = poster_time / c->time_scale; + snprintf(buffer, sizeof(buffer), "%i", poster_time_location); + av_dict_set(&c->fc->metadata, "poster_time_location", buffer, 0); + } + return 0; } @@ -9114,7 +9123,7 @@ static const AVOption mov_options[] = { { "enable_drefs", "Enable external track support.", OFFSET(enable_drefs), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS }, { "max_stts_delta", "treat offsets above this value as invalid", OFFSET(max_stts_delta), AV_OPT_TYPE_INT, {.i64 = UINT_MAX-48000*10 }, 0, UINT_MAX, .flags = AV_OPT_FLAG_DECODING_PARAM }, - + { "poster_time_location", "Export the poster time location.", OFFSET(poster_time_location), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, FLAGS | AV_OPT_FLAG_EXPORT }, { NULL }, }; base-commit: 5f02a261a2ddca7c79198869b45d35019baac819 -- ffmpeg-codebot