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Do not attempt to decode RV30/40 B-frames without anchors.

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This fixes issue 747.

Originally committed as revision 16031 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Kostya Shishkov 2008-12-07 16:30:08 +00:00
parent 2014b51cae
commit 0dfcc36818
1 changed files with 2 additions and 0 deletions
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2
libavcodec/rv34.c
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@ -1406,6 +1406,8 @@ int ff_rv34_decode_frame(AVCodecContext *avctx,
}else
r->si.end = si.start;
}
if(!i && si.type == FF_B_TYPE && (!s->last_picture_ptr || !s->last_picture_ptr->data[0]))
return -1;
last = rv34_decode_slice(r, r->si.end, buf + offset, size);
s->mb_num_left = r->s.mb_x + r->s.mb_y*r->s.mb_width - r->si.start;
if(last)