Miscellany

struct foo commflaginfo[myTotalFrames]
while (!nvp->GetEof()) {
	frame = nvp->GetRawVideoFrame();
	ProcessFrame(frame, &commflaginfo[frameno]);
	/* Save whatever you need into commflaginfo[] */
	nvp->DiscardVideoFrame(frame);
}
/* Now loop through commflaginfo[] to do processing */