ensure av_rescale_q() can be calculated (won't divide by zero)

Originally committed as revision 11592 to svn://svn.ffmpeg.org/ffmpeg/trunk
17 years ago · 7f938dd32b
parent c14731d8da
commit 7f938dd32b
1 changed files with 1 additions and 1 deletions
--- 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;