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avformat/mp3dec: Require 50% of the file to be mp3 frames in the maxframes>200 probing test 

This corrects several misdetections of large files

Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2018-05-12 18:33:28 +02:00
parent 60d1792779
commit 81b3e7c9c3
1 changed files with 1 additions and 1 deletions
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libavformat/mp3dec.c
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@ -107,7 +107,7 @@ static int mp3_read_probe(AVProbeData *p)
// keep this in sync with ac3 probe, both need to avoid
// issues with MPEG-files!
if (first_frames>=7) return AVPROBE_SCORE_EXTENSION + 1;
else if(max_frames>200)return AVPROBE_SCORE_EXTENSION;
else if(max_frames>200 && p->buf_size < 2*max_framesizes)return AVPROBE_SCORE_EXTENSION;
else if(max_frames>=4 && p->buf_size < 2*max_framesizes) return AVPROBE_SCORE_EXTENSION / 2;
else if(ff_id3v2_match(buf0, ID3v2_DEFAULT_MAGIC) && 2*ff_id3v2_tag_len(buf0) >= p->buf_size)
return p->buf_size < PROBE_BUF_MAX ? AVPROBE_SCORE_EXTENSION / 4 : AVPROBE_SCORE_EXTENSION - 2;