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ffv1enc: fix integer overflow with high resolutions and lots of slices. 

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-09-29 19:11:25 +02:00
parent 594b1fcb28
commit f049729e61
1 changed files with 1 additions and 2 deletions
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3
libavcodec/ffv1.c
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@ -1313,9 +1313,8 @@ static int encode_frame(AVCodecContext *avctx, AVPacket *pkt,
for(i=1; i<f->slice_count; i++){
FFV1Context *fs= f->slice_context[i];
uint8_t *start = pkt->data + (pkt->size-used_count)*i/f->slice_count;
uint8_t *start = pkt->data + (pkt->size-used_count)*(int64_t)i/f->slice_count;
int len = pkt->size/f->slice_count;
ff_init_range_encoder(&fs->c, start, len);
}
avctx->execute(avctx, encode_slice, &f->slice_context[0], NULL, f->slice_count, sizeof(void*));