CODEC_FLAG2_MBTREE  313 libavcodec/libx264.c     x4->params.rc.b_mb_tree               = !!(avctx->flags2 & CODEC_FLAG2_MBTREE);
CODEC_FLAG2_MBTREE  392 libavcodec/options.c {"mbtree", "use macroblock tree ratecontrol (x264 only)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_MBTREE, INT_MIN, INT_MAX, V|E, "flags2"},