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can’t rotoscope seperate fields
I am trying to rotoscope footage that I used from Final Cut Pro to After Effects using Automatic Duck. In FCP the footage is upper fields and square pixels. As I use the pen tool the image seems to jump a frame and then when I create a point the image jumps back a frame. I tried interpolating the footage using guess pull downs, and changing upper, to lower, no fields. I can’t seem to have the not footage jump back and forth from frames.
Using FCP 6, AE CS3, and I believe the footage is AVC-Intra -
5 Replies
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AVC-Intra https://en.wikipedia.org/wiki/AVC-Intra
I had to download an AVC-Intra update into FCP to make it useable. With that download I don’t have to render it. I think half my problem is that AE doesn’t support this kind of codec. This is probably why I am having an audio problem.
I haven’t checked out the field dominance yet or tried rotoscoping yet. I just wanted to get back to you on the AVC-Intra. There is also an article about it in Septs issue of “Videography” magazine.
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it seems like a nice codec for acquisition, however it sounds like fcp transcodes it to prores for use in fcp. that’s not necessarily bad, fcp does a very similar process when importing dvcprohd material that is in a p2/mxf wrapper…
however, it means you want to either export out the clips you want to effect in ae (most likely as a lossless mov) or pull the transcoded clips into ae directly from the fcp capture scratch folder that the media was transcoded to when you imported into fcp…
onto you problem, it does sound a bit like a filed interpretation issue, maybe wrong filed order…
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
actually it goes on to explain that it uses intra-frame only compression, so i assume it uses a similar intra-frame compression that mpeg-4 uses, but no the inter-frame component of mpeg-4 compression.
but i still would export from fcp as lossless mov to avoid further loss of image quality due to intra-frame compression…
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW -
Okay, It keeps getting weirder. I started up AE to keep working on my rotoscope of the footage and it’s not jumping the frames. Great, so I start trucking along when it starts jumping again. I save my work as is, quit AE, open it up again, start where I left off and it’s not jumping frames. A little bit down the road it starts jumping again. What is going on here?
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the next time you see it start happening, try edit>purge>all to see if that clears up the problem… not a solution but maybe a quicker workaround….
if that does work though, it may point at a problem with clearing cached frames. to try to start narrowing possible issues down you might try disabling multiprocessing (preferences>multiprocessing, uncheck the option), enabling or disabling disk caching (preferences>memory & cache) and/or setting the memory & cache settings to the defaults (120% max ram usage, 60% max ram cache)…
this isn’t something i’ve heard of before, so it’s just trying various things to troubleshoot it and hopefully narrow it down to a setting…
Kevin Camp
Senior Designer
KCPQ, KMYQ & KRCW
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