Weird blinking screen on green screen footage

I have this problem with AE, when I RAM preview the pre-keyed green screen footage I get a colourful box of lines popping up now and then when I play the footage. It's hard to explain, but the screen looks like one of those vertical-colourful-lines that you get on the TV when the channel isn't working (On Screen Display?) I will attach the screenshot of how it looks to this discussion. Also, the footage is not missing, it's there, and the blinking only happens when I preview in AE, not when it's rendered. Thank you!

GrowthE wrote:
The format is .MOV, straight from Canon 600D, so I guess no codec?
A format is just a container for a video encoded with a codec. All video, as Rick says, has a codec. Most DSLR's use an h.264 variant as their codec. The problem with that codec for certain things is that it uses interframe compression. I could get into a long explanation of this, but the short version is that it doesn't have full information for every frame. That sort of thing can sometimes get screwy in AE which uses full-frame information for every frame. This was much more of an issue in earlier versions of AE, but from CS5 onward, things are much improved. However, with multiprocessing on, sometimes you can see weirdness with these highly-compressed interframe codecs. That's why Rick is suggesting you try turning that off and clearing your cache.

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Message was edited by: Paul Cuciti

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If it also solves your problem, clicking ACCEPT AS SOLUTION below it will benefit other users!

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Weird blinking screen on green screen footage

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