mpeg1_encode_mb_internal  662 libavcodec/mpeg12enc.c     if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
mpeg1_encode_mb_internal  663 libavcodec/mpeg12enc.c     else                                mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);