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-rw-r--r--libavformat/mxfdec.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libavformat/mxfdec.c b/libavformat/mxfdec.c
index 4b56984b77..3a090147a0 100644
--- a/libavformat/mxfdec.c
+++ b/libavformat/mxfdec.c
@@ -3615,7 +3615,7 @@ static int mxf_probe(const AVProbeData *p) {
AV_RN32(bufp+ 4) == AV_RN32(mxf_header_partition_pack_key+ 4) &&
AV_RN32(bufp+ 8) == AV_RN32(mxf_header_partition_pack_key+ 8) &&
AV_RN16(bufp+12) == AV_RN16(mxf_header_partition_pack_key+12))
- return AVPROBE_SCORE_MAX;
+ return bufp == p->buf ? AVPROBE_SCORE_MAX : AVPROBE_SCORE_MAX - 1;
bufp ++;
} else
bufp += 10;