After effects Keying glitch, how do I fix?

[Roland R. kahlenberg]

It looks like a CODEC issue. You may want to replace one of the footage items again to test if this is correct. Otherwise you’ll have to render multiple times and edit out the bad parts – hopefully the glitches don’t overlap.

HTH
RoRK

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[Kurt Hudson]

I tried a couple different compressions and still got this issue, its weird because everytime its in different places… I was going to render multiple times and edit out the bad parts as a last resort but I figured that would be one way to solve the problem… have you personally had this issue before? how was it solved?

[Roland R. kahlenberg]

The issue is with the CODEC of the source, specifically the decoding part – just a guess on my part. It looks like AE, through the video architecture via the CODEC isn’t able to decode the source footage accurately. The artefacting that you’re seeing is what you normally get with a poorly encoded digital image. I am doubtful that your issues are related to the CODEC that you are rendering with.

Test the source. Try to redigitize if you can. And nope I haven’t had this issue while keying.

Good Luck
RoRK

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[Kurt Hudson]

Hey thanks Dave! Its actually HVX 200 720x24pn (960×720) and im stretching it out to be 1280×720 to be 16:9. I tried using the raw footage as well as sending it thru final cut to be compressed again and im still getting the same problem. Im going to try the animation codec like you said, ill let you know if it helps. Thanks again!

[Kurt Hudson]

let me know what you need to know, im working on it right now so ill be able to keep you updated. thanks for your help!

[Tony Silva]

bah, fix it in post! 🙂

how often does it appear? every frame? once a minute?
Does it only glitch out on this footage? I would try shooting something else as a quick test, maybe it was a bad transfer from the p2 card?

[John Cuevas]

Actually had a similiar looking problems years ago, back in the 4.5, 5.0 days. With a much much slower cpu and a lot less RAM. Wasn’t the import footage or codecs, but the computer. Would happen on all sorts of things that involved a lot of processing. New computer solved everything and haven’t had that problem in years.

Try the “secret” preferences screen(hold shift+cntl when opening preferences). Disable layer cache and turn on purge frames, say every 10 frames.

Johnny Cuevas, Editor
http://www.ckandco.net

[Ray Crown]

Some Times I user OpenGL render Make problem just like you,and then i switch to Best Setting in after effects,And the result is good,

Also some sapphire plugin make some noise sometimes,You may need to check which plugin in your after effects,

[Kurt Hudson]

Ive tried everything it only does it randomly in different places each time i render or ram preview… i might just have to do a few renders and edit out the shitty bits… unless you might be able to help? 🙂

[Roland R. kahlenberg]

Many thanks to John and Ray for their input. It’s still difficult to pin-point the issue becaue the original poster didn’t see these artefacts during previews. So it’s likely a memor yissue related to rendering/CODEC.

Hpewfully things get sorted out for now and later.

Cheers
RoRK

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