[FFmpeg-cvslog] avformat/mov: decrease probe score for a random tag

[Zhao Zhili]

ffmpeg | branch: master | Zhao Zhili <zhilizhao at tencent.com> | Mon May 22 22:07:49 2023 +0800| [b7e79ba395ef3a0b3bca968eee8cbe1243ad19bb] | committer: Zhao Zhili

avformat/mov: decrease probe score for a random tag

The tag comes from samples/ffmpeg/mov/unrecognized/bartjones.mov
really looks like some random data. Now the random tag matched
another file, which isn't a mov.

Signed-off-by: Zhao Zhili <zhilizhao at tencent.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=b7e79ba395ef3a0b3bca968eee8cbe1243ad19bb
---

 libavformat/mov.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/libavformat/mov.c b/libavformat/mov.c
index 192e460038..a8d004e02b 100644
--- a/libavformat/mov.c
+++ b/libavformat/mov.c
@@ -8111,6 +8111,8 @@ static int mov_probe(const AVProbeData *p)
             score  = FFMAX(score, AVPROBE_SCORE_MAX - 5);
             break;
         case MKTAG(0x82,0x82,0x7f,0x7d):
+            score  = FFMAX(score, AVPROBE_SCORE_EXTENSION - 5);
+            break;
         case MKTAG('s','k','i','p'):
         case MKTAG('u','u','i','d'):
         case MKTAG('p','r','f','l'):