FOURCC.org - Video Codecs and Pixel Formats

CLJR yuv pixel format

Cirrus Logic's format packs 4 pixel samples into a single u_int32 by sacrificing precision on each sample. Y samples are truncated to 5 bits each, U and V have 6 bits per sample.

  Horizontal Vertical
Y Sample Period 1 1
V Sample Period 4 1
U Sample Period 4 1

Effective bits per pixel : 8

Positive biHeight implies top-down image (top line first)