the frame rate is derived from audio_br and audio_subsegments via integer
division. if audio_br is small enough that the result truncates to zero,
avpriv_set_pts_info() silently ignores the call, leaving the video stream
with an invalid timebase.
---
libavformat/mtv.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/libavformat/mtv.c b/libavformat/mtv.c
index c888443b7a..10be0faf7e 100644
--- a/libavformat/mtv.c
+++ b/libavformat/mtv.c
@@ -155,8 +155,10 @@ static int mtv_read_header(AVFormatContext *s)
audio_subsegments * (MTV_AUDIO_PADDING_SIZE + MTV_ASUBCHUNK_DATA_SIZE)
+
mtv->img_segment_size;
mtv->video_fps = (mtv->audio_br / 4) / audio_subsegments;
-
- // FIXME Add sanity check here
+ if (!mtv->video_fps) {
+ av_log(s, AV_LOG_ERROR, "Invalid frame rate\n");
+ return AVERROR_INVALIDDATA;
+ }
// all systems go! init decoders
--
2.43.0
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