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RAM Preview Error: 2 Or More Frames For Playback

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Nolan Beguhl
RAM Preview Error: 2 Or More Frames For Playback
on Apr 23, 2010 at 3:52:07 am

Okay, well like the title says whenever I attempt to RAM preview the error comes up "You need 2 or more frames for playback". Searched around, but haven't found an answer.

My files are .mov.


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Dave LaRonde
Re: RAM Preview Error: 2 Or More Frames For Playback
on Apr 23, 2010 at 1:10:02 pm

What kind of footage are you using? That's a very common cause of this error:

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, AVCHD, mp4, mts, 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.


Dave LaRonde
Sr. Promotion Producer
KCRG-TV (ABC) Cedar Rapids, IA


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Todd Kopriva
Re: RAM Preview Error: 2 Or More Frames For Playback
on Apr 25, 2010 at 1:55:56 am

Most of the time when I see that error, it's becuase my current-time indicator is at the end of my composition, and I have From Current Time selected in the Preview panel.

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Todd Kopriva, Adobe Systems Incorporated
putting the 'T' back in 'RTFM' : After Effects Help on the Web
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Nolan Beguhl
Re: RAM Preview Error: 2 Or More Frames For Playback
on Apr 25, 2010 at 5:18:44 am

You are a genius Todd. Thanks.


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