---
libavformat/matroskaenc.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/libavformat/matroskaenc.c b/libavformat/matroskaenc.c
index cab43f4..8688616 100644
--- a/libavformat/matroskaenc.c
+++ b/libavformat/matroskaenc.c
@@ -769,6 +769,8 @@ static int mkv_write_track(AVFormatContext *s,
MatroskaMuxContext *mkv,
// if we need to clear it.
if (!(st->disposition & AV_DISPOSITION_DEFAULT))
put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGDEFAULT, !!(st->disposition &
AV_DISPOSITION_DEFAULT));
+ if (st->disposition & AV_DISPOSITION_FORCED)
+ put_ebml_uint(pb, MATROSKA_ID_TRACKFLAGFORCED, !!(st->disposition &
AV_DISPOSITION_FORCED));
if (codec->codec_type == AVMEDIA_TYPE_AUDIO && codec->initial_padding) {
mkv->tracks[i].ts_offset = av_rescale_q(codec->initial_padding,
--
2.1.0
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