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-rw-r--r--libavformat/ac3dec.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/libavformat/ac3dec.c b/libavformat/ac3dec.c
index ba05f740fd..3741ee44fc 100644
--- a/libavformat/ac3dec.c
+++ b/libavformat/ac3dec.c
@@ -37,6 +37,8 @@ static int ac3_eac3_probe(AVProbeData *p, enum CodecID expected_codec_id)
end = buf + p->buf_size;
for(; buf < end; buf++) {
+ if(buf > p->buf && (buf[0] != 0x0B || buf[1] != 0x77) )
+ continue;
buf2 = buf;
for(frames = 0; buf2 < end; frames++) {