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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 4a674042e8..d3e6afef57 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -1426,7 +1426,7 @@ static void av_update_stream_timings(AVFormatContext *ic)
duration = INT64_MIN;
for(i = 0;i < ic->nb_streams; i++) {
st = ic->streams[i];
- if (st->start_time != AV_NOPTS_VALUE) {
+ if (st->start_time != AV_NOPTS_VALUE && st->time_base.den) {
start_time1= av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q);
if (start_time1 < start_time)
start_time = start_time1;