On 09/02/2018 22:56, Sean McGovern wrote:
From: Michael Niedermayer <michae...@gmx.at>Bug-Id: 1100 Bug-Id: ffmpeg/Ticket2531 Cc: libav-sta...@libav.org --- libavcodec/vc1dec.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/libavcodec/vc1dec.c b/libavcodec/vc1dec.c index 8902110..5005a21 100644 --- a/libavcodec/vc1dec.c +++ b/libavcodec/vc1dec.c @@ -652,7 +652,7 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data, buf_size3 << 3); /* assuming that the field marker is at the exact middle, hope it's correct */ - slices[n_slices].mby_start = s->mb_height >> 1; + slices[n_slices].mby_start = s->mb_height + 1 >> 1; n_slices1 = n_slices - 1; // index of the last slice of the first field n_slices++; break; @@ -700,7 +700,7 @@ static int vc1_decode_frame(AVCodecContext *avctx, void *data, buf_size3 = vc1_unescape_buffer(divider + 4, buf + buf_size - divider - 4, slices[n_slices].buf); init_get_bits(&slices[n_slices].gb, slices[n_slices].buf, buf_size3 << 3); - slices[n_slices].mby_start = s->mb_height >> 1; + slices[n_slices].mby_start = s->mb_height + 1 >> 1; n_slices1 = n_slices - 1; n_slices++; }
Looks strange, isn't it (s->mb_height + 1) >> 1 ? _______________________________________________ libav-devel mailing list libav-devel@libav.org https://lists.libav.org/mailman/listinfo/libav-devel
