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avformat/apngdec: set pts to AV_NOPTS_VALUE 

And let the generic code figure out the proper PTS. This is needed because apng
does not provide seek functions, but after a generic seek (e.g. to file start)
timestamps are not reset which causes broken timestamps when looping apngs,
like in ticket #6121.

Signed-off-by: Marton Balint <cus@passwd.hu>
This commit is contained in:
Marton Balint 2018-06-28 21:07:30 +02:00
parent da36bcbeb7
commit 06a8d7ff00
1 changed files with 1 additions and 3 deletions
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4
libavformat/apngdec.c
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@ -44,7 +44,6 @@ typedef struct APNGDemuxContext {
int max_fps; int max_fps;
int default_fps; int default_fps;
int64_t pkt_pts;
int pkt_duration; int pkt_duration;
int is_key_frame; int is_key_frame;
@ -390,9 +389,8 @@ static int apng_read_packet(AVFormatContext *s, AVPacket *pkt)
if (ctx->is_key_frame) if (ctx->is_key_frame)
pkt->flags |= AV_PKT_FLAG_KEY; pkt->flags |= AV_PKT_FLAG_KEY;
pkt->pts = ctx->pkt_pts; pkt->pts = pkt->dts = AV_NOPTS_VALUE;
pkt->duration = ctx->pkt_duration; pkt->duration = ctx->pkt_duration;
ctx->pkt_pts += ctx->pkt_duration;
return ret; return ret;
case MKTAG('I', 'E', 'N', 'D'): case MKTAG('I', 'E', 'N', 'D'):
ctx->cur_loop++; ctx->cur_loop++;