content: concatenation of various sources (10000 frames, 480p)
labels: P[nnz4x4][nnz8x8][is8x8] count
only non-skip inter macroblocks were counted.

  crf=20:
P000 1453833
P001 0
P010 190501
P011 109030
P100 92879
P101 175290
P110 1170723
P111 1539729

  crf=30:
P000 1665123
P001 0
P010 98248
P011 72167
P100 71237
P101 172784
P110 272891
P111 510664