CODEC_ID_RAWVIDEO <->  Y41B
CODEC_ID_RAWVIDEO <->  Y42B
CODEC_ID_RAWVIDEO <->  YUV9
CODEC_ID_RAWVIDEO <->  YVU9

These codec tags are listed in fourcc.org, and are already listed in
libavcodec/raw.c:ff_raw_pix_fmt_tags as AVI tags.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23296 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b