The last line on http://en.flossmanuals.net/PureData/GEMImagesMoviesAndVideo says to check out the [sig2pix~] object. The object is actually [pix_sig2pix~].
Separately, in the help patch for [pix_movie] it recommends using the same [colorspace RGBA( messages that work with [pix_film], but these messages return the error: "pix_movieDarwin: no method for 'colorspace'"
I wasn't sure who to send these corrections to, but I figured whoever it was is probably on the list.
Thanks!
-Ben