x264 DRC patches ================ **NOTE** Like all our patches to standard software, this code is fragile and not ready for production use. Use at your own risk. * Added a new x264 param: b_drh_mode * Enables DRH style slicing: emit a NAL unit every 6 rows of macroblocks. * Disables planar prediction (not working on DRC) - should be made runtime configurable at some point * Force pic_init_qp to 32 and slice_qp_delta to 0.