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Workaround broken AVI files from DC-XZ6. 

Fixes issue897.

Originally committed as revision 18942 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2009-05-25 18:28:26 +00:00
parent 80704c47c4
commit 8c68f25b20
1 changed files with 11 additions and 0 deletions
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11
libavformat/avidec.c
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@ -955,19 +955,30 @@ static int guess_ni_flag(AVFormatContext *s){
int i;
int64_t last_start=0;
int64_t first_end= INT64_MAX;
int64_t oldpos= url_ftell(s->pb);
for(i=0; i<s->nb_streams; i++){
AVStream *st = s->streams[i];
int n= st->nb_index_entries;
unsigned int size;
if(n <= 0)
continue;
if(n >= 2){
int64_t pos= st->index_entries[0].pos;
url_fseek(s->pb, pos + 4, SEEK_SET);
size= get_le32(s->pb);
if(pos + size > st->index_entries[1].pos)
last_start= INT64_MAX;
}
if(st->index_entries[0].pos > last_start)
last_start= st->index_entries[0].pos;
if(st->index_entries[n-1].pos < first_end)
first_end= st->index_entries[n-1].pos;
}
url_fseek(s->pb, oldpos, SEEK_SET);
return last_start > first_end;
}