1] had to make some changes to pf-rawvideo.mencoder shell to use mktemp rather than tempfile and to lose scaling from mencoder which didn't work (thus had to put size into rawvideo.pf:
: grab ` bitmap/i420/544/400 stream @ read-raw-packet # grab raw bitmap from stream >image ; # convert to image "( -- image )\tGrab next frame." doc
2] then in pf:
"/path/filename.avi" open tv
next steps to work with frames