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mpegvideo_probe: Fix misdetection of mpeg4video files.

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(issue1210)

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-03-09 22:25:32 +01:00
parent ad53c7f9ec
commit 174678ff5b
1 changed files with 4 additions and 2 deletions
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6
libavformat/mpegvideodec.c
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@ -34,7 +34,7 @@
static int mpegvideo_probe(AVProbeData *p)
{
uint32_t code= -1;
int pic=0, seq=0, slice=0, pspack=0, vpes=0, apes=0;
int pic=0, seq=0, slice=0, pspack=0, vpes=0, apes=0, res=0;
int i;
for(i=0; i<p->buf_size; i++){
@ -44,13 +44,15 @@ static int mpegvideo_probe(AVProbeData *p)
case SEQ_START_CODE: seq++; break;
case PICTURE_START_CODE: pic++; break;
case PACK_START_CODE: pspack++; break;
case 0x1b6:
res++; break;
}
if (code >= SLICE_START_CODE && code <= 0x1af) slice++;
if ((code & 0x1f0) == VIDEO_ID) vpes++;
else if((code & 0x1e0) == AUDIO_ID) apes++;
}
}
if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !apes)
if(seq && seq*9<=pic*10 && pic*9<=slice*10 && !pspack && !apes && !res)
if(vpes) return AVPROBE_SCORE_MAX/8;
else return pic>1 ? AVPROBE_SCORE_MAX/2+1 : AVPROBE_SCORE_MAX/4; // +1 for .mpg
return 0;