[FFmpeg-devel] [Internet][PATCH] avformat/mov: decrease probe score for a random tag

[Zhao Zhili]

On Mon, 2023-05-22 at 22:07 +0800, Zhao Zhili wrote:
> From: Zhao Zhili <zhilizhao at tencent.com>
> 
> 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.
> ---
>  libavformat/mov.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/libavformat/mov.c b/libavformat/mov.c
> index 9fdeef057e..285a4e99ca 100644
> --- a/libavformat/mov.c
> +++ b/libavformat/mov.c
> @@ -8107,6 +8107,8 @@ 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'):

Pushed as b7e79ba3.