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-rw-r--r--libavformat/utils.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 909c7deacc..a50d6f441a 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -712,7 +712,7 @@ void ff_compute_frame_duration(AVFormatContext *s, int *pnum, int *pden, AVStrea
AVCodecParserContext *pc, AVPacket *pkt)
{
AVRational codec_framerate = s->iformat ? st->codec->framerate :
- av_inv_q(st->codec->time_base);
+ av_mul_q(av_inv_q(st->codec->time_base), (AVRational){1, st->codec->ticks_per_frame});
int frame_size;
*pnum = 0;