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-rw-r--r--libavcodec/vc1dec.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c
index 7381601..421d8f7 100644
--- a/libavcodec/vc1dec.c
+++ b/libavcodec/vc1dec.c
@@ -3039,7 +3039,7 @@ static av_cold int vc1_decode_init(AVCodecContext *avctx)
}
buf2 = av_mallocz(avctx->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
- if(start[0]) start++; // in WVC1 extradata first byte is its size
+ start = find_next_marker(start, end); // in WVC1 extradata first byte is its size, but can be 0 in mkv
next = start;
for(; next < end; start = next){
next = find_next_marker(start + 4, end);
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