successfully deinterlacing a smooth pan
by simon bryant
on
Oct 3, 2008 at 12:08:07 pm
Hi,
I'm working on a short film which was shot on DigiBeta and I've been editing 8-bit uncompressed. Now that the cut is done I want to de-interlace, blending fields - everything looks great apart from a long smooth pan , which is intolerably jittery, I've tried stibs smart de-interlacer and all the Nattress options. Am I missing something or is this just a consequence of de-interlacing?
Re: successfully deinterlacing a smooth pan by david bogie on Oct 3, 2008 at 4:56:49 pm
You've got to tell us on what monitor/display you're viewing the sequence.
8-bit compressed is a color space setting, the frame rate is not part of that setting.
bogiesan
This is my standard sigfile so do not take it personally: "For crying out loud, read the freakin' manual."
Re: successfully deinterlacing a smooth pan by Dave LaRonde on Oct 3, 2008 at 7:58:50 pm
[simon bryant]"Am I missing something or is this just a consequence of de-interlacing?"
It very well could be due to the deinterlacing. You could be seeing judder, a very non-technical term. It reveals itself by looking more like a series of discrete stills rather than a formerly nice, smooth pan.
If you looked at a similarly-treated pan that's a little quicker or a little slower, you might not see it.
Consider what deinterlacing does: even if you recover the vertical resolution from both fields through a deinterlacing plugin, you still toss away half the TEMPORAL information contained in interlaced video. Something that looks nice 'n smooth interlaced can look not so smooth anymore even when it's properly deinterlaced.
Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA
