The av1_merge_frame BSF outputs its cached data when it sees the
beginning of a new frame, i.e. when it sees a temporal delimiter OBU.
Therefore it typically has a temporal delimiter OBU cached after
outputting a packet.
This implies that the OBU demuxer must flush its BSF upon seeking
because otherwise the first frame returned after a seek consists
of an old temporal delimiter OBU only.
Signed-off-by: Andreas Rheinhardt <andreas.rheinha...@outlook.com>
---
The AV1 Annex B demuxer also has two issues: It records the wrong
positions (it is off due to the annex b packetization) and it needs to
flush the bsf, too. Will look into it.
libavformat/av1dec.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavformat/av1dec.c b/libavformat/av1dec.c
index d5d4548d8b..88a3c325e4 100644
--- a/libavformat/av1dec.c
+++ b/libavformat/av1dec.c
@@ -390,6 +390,10 @@ static int obu_read_packet(AVFormatContext *s, AVPacket
*pkt)
AV1DemuxContext *const c = s->priv_data;
int ret;
+ if (s->io_repositioned) {
+ av_bsf_flush(c->bsf);
+ s->io_repositioned = 0;
+ }
while (1) {
ret = obu_get_packet(s, pkt);
/* In case of AVERROR_EOF we need to flush the BSF. Conveniently
--
2.30.2
_______________________________________________
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".
