from
https://github.com/MythTV/mythtv/commit/28d2b3e87763c6102d20cfe959547b1a5f5cd609
---
libavformat/demux.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/libavformat/demux.c b/libavformat/demux.c
index cba1f2e4df..b4fa7f912d 100644
--- a/libavformat/demux.c
+++ b/libavformat/demux.c
@@ -693,6 +693,10 @@ static void compute_frame_duration(AVFormatContext *s, int
*pnum, int *pden,
*pnum = 0;
*pden = 0;
+
+ if (!st || !st->codecpar)
+ return;
+
switch (st->codecpar->codec_type) {
case AVMEDIA_TYPE_VIDEO:
if (st->r_frame_rate.num && (!pc || !codec_framerate.num)) {
--
2.43.0
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