When writing WebMs, FFmpeg muxes WebVTT subtitles with the D_WEBVTT/* codec tags from the WebM specs [1]. However, it does the same when muxing MKV files, and the Matroska specifications instead use S_TEXT/WEBVTT tags for WebVTT subtitles [2], which FFmpeg currently doesn't understand. Support reading MKVs using either tag, write regular MKVs with S_TEXT/WEBVTT, and write WebMs with the D_WEBVTT/* tags we already use.
[1]: https://www.webmproject.org/docs/container/ [2]: https://matroska.org/technical/codec_specs.html#s_textwebvtt Signed-off-by: Gwyneth Morgan <gwy...@tilde.club> Fixes: https://trac.ffmpeg.org/ticket/5641 --- libavformat/matroska.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-) diff --git a/libavformat/matroska.c b/libavformat/matroska.c index 90d94b6..07aeed2 100644 --- a/libavformat/matroska.c +++ b/libavformat/matroska.c @@ -60,16 +60,12 @@ const CodecTags ff_mkv_codec_tags[]={ {"A_VORBIS" , AV_CODEC_ID_VORBIS}, {"A_WAVPACK4" , AV_CODEC_ID_WAVPACK}, - {"D_WEBVTT/SUBTITLES" , AV_CODEC_ID_WEBVTT}, - {"D_WEBVTT/CAPTIONS" , AV_CODEC_ID_WEBVTT}, - {"D_WEBVTT/DESCRIPTIONS", AV_CODEC_ID_WEBVTT}, - {"D_WEBVTT/METADATA" , AV_CODEC_ID_WEBVTT}, - {"S_TEXT/UTF8" , AV_CODEC_ID_SUBRIP}, {"S_TEXT/UTF8" , AV_CODEC_ID_TEXT}, {"S_TEXT/ASCII" , AV_CODEC_ID_TEXT}, {"S_TEXT/ASS" , AV_CODEC_ID_ASS}, {"S_TEXT/SSA" , AV_CODEC_ID_ASS}, + {"S_TEXT/WEBVTT" , AV_CODEC_ID_WEBVTT}, {"S_ASS" , AV_CODEC_ID_ASS}, {"S_SSA" , AV_CODEC_ID_ASS}, {"S_VOBSUB" , AV_CODEC_ID_DVD_SUBTITLE}, @@ -77,6 +73,11 @@ const CodecTags ff_mkv_codec_tags[]={ {"S_HDMV/PGS" , AV_CODEC_ID_HDMV_PGS_SUBTITLE}, {"S_HDMV/TEXTST" , AV_CODEC_ID_HDMV_TEXT_SUBTITLE}, + {"D_WEBVTT/SUBTITLES" , AV_CODEC_ID_WEBVTT}, + {"D_WEBVTT/CAPTIONS" , AV_CODEC_ID_WEBVTT}, + {"D_WEBVTT/DESCRIPTIONS", AV_CODEC_ID_WEBVTT}, + {"D_WEBVTT/METADATA" , AV_CODEC_ID_WEBVTT}, + {"V_AV1" , AV_CODEC_ID_AV1}, {"V_AVS2" , AV_CODEC_ID_AVS2}, {"V_AVS3" , AV_CODEC_ID_AVS3}, _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org https://ffmpeg.org/mailman/listinfo/ffmpeg-devel To unsubscribe, visit link above, or email ffmpeg-devel-requ...@ffmpeg.org with subject "unsubscribe".
