Originally Posted by Josh@dvdo
There is not a mode like this currently implemented on the iScans. I was using an Optoma H79 for a little while and I know that it would always need to re-sync when I change the frame rate between 48Hz and 60Hz. One potential issue, I can see with this being done automatically, is that you may be watching commercials and a movie trailer kicks the iScan into "multiple-of-24" mode and then the commercial is finished and it takes 10 seconds for the iScan to switch back, and you have judder for 10 seconds plus the amount of time it may take for the display to re-sync. Although, I think this would make sense if the output frame rate was switched to a "multiple-of-24" when the user selects "Film Bias" mode for deinterlacing.
You're right, I didn't think of commercials. Good thought. Hmmmmm... Also: What output refresh rate should the iScan use if there are video mode overlays over the movie?
My pay TV channels don't have any commercials in the midst of the movie, though, and no video mode overlays, either. So for my pay TV channels having an automatic "multiple-of-24" switching mode would be nice. For HD-DVD and BluRay it might be nice, too, although I'm not sure whether there'll be much video content on HD-DVD and BluRay. So maybe setting it to forced 24fps output would work, too.
P.S: I've another idea how the 10 second delay could be solved: When the iScan detects a change between video and film mode, it could change output refresh rate at once. But in this moment the iScan could set an internal flag. As long as this flag is set, the iScan should not change output refresh rate, anymore, no matter what video/film mode detection sais. The flag should be cleared when there's 10 second straight of either film or video mode. This should get rid of unnessecary delays. Additionally, it would be nice if the iScan noticed itself if it's constantly switching between video/film mode for a longer time. In that case it should switch into 60fps output, cause in such a situation 60fps should be the better fit. Complicated...