current_pixel_pair = (unsigned int *)current_line;
vert_pred = s->vert_pred;
mb_change_index = 0;
- mb_change_byte = mb_change_bits[mb_change_index++];
+ if (!keyframe)
+ mb_change_byte = mb_change_bits[mb_change_index++];
mb_change_byte_mask = 0x01;
pixels_left = s->avctx->width;