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Flickering Video

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Rob Hochberg
Flickering Video
on Jan 23, 2010 at 1:35:59 am

Hello, I'm running CS4... I have multiple video clips playing (different sizes), and some flicker with frames of black alternating with frames from a different clip. I have never seen this happen before.. it does not happen on a ram preview but only when i make the movie. please let me know if you have any advice on how to correct this.

thank you

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Michael Szalapski
Re: Flickering Video
on Jan 23, 2010 at 3:50:24 am

Are you, by chance, using a video with an interframe compression scheme?

Dave's Stock Answer #1:

If the footage you imported into AE is any kind of the following --
footage in an HDV acquisition codec, MPEG1, MPEG2, mp4, m2t, H.261 or
H.264 -- you need to convert it to a different codec.

These kinds of footage use temporal, or interframe compression. They
have keyframes at regular intervals, containing complete frame
information. However, the frames in between do NOT have complete
information. Interframe codecs toss out duplicated information.

In order to maintain peak rendering efficiency, AE needs complete
information for each and every frame. But because these kinds of footage
contain only partial information, AE freaks out, resulting in a wide
variety of problems.

- The Great Szalam
(The 'Great' stands for 'Not So Great, in fact, Extremely Humble')

No trees were harmed in the creation of this message, but several thousand electrons were mildly inconvenienced.

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Rob Hochberg
Re: Flickering Video
on Jan 23, 2010 at 6:32:31 pm

thank you so much for your help... i will give it a try when I can get back on my system... the videos may be h264.

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