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-rw-r--r--libavcodec/h264.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavcodec/h264.c b/libavcodec/h264.c
index 22106a9090..ade316b2e8 100644
--- a/libavcodec/h264.c
+++ b/libavcodec/h264.c
@@ -3469,6 +3469,8 @@ static int decode_slice_header(H264Context *h){
s->avctx->width = s->width;
s->avctx->height = s->height;
s->avctx->sample_aspect_ratio= h->sps.sar;
+ if(!s->avctx->sample_aspect_ratio.den)
+ s->avctx->sample_aspect_ratio.den = 1;
if(h->sps.timing_info_present_flag && h->sps.fixed_frame_rate_flag){
s->avctx->frame_rate = h->sps.time_scale;