Known Participant

Question

After Effects (Beta) error: Cached Preview needs 2 or more frames to playback

Forum|Forum|3 years ago
March 2, 2022
2 replies
4125 views

Hello. Loving the beta for the past few weeks. But when I upgraded today, I could only get ram previews to work new projects. Old projects yield:

"After Effects (Beta) error: Cached Preview needs 2 or more frames to playback"

This seems to be a very old bug wich has resurfaced. I purged all, increased cache size, trashed prefs... Restarted. No luck. Same project/comps ram preview correctly when I launch 22.2.0... even when current and beta AE are launched concurrently.

AE (beta) 22.3.0 build 90

Apple M1 Max, 64 GB RAM, MacOs 12.2.1

This topic has been closed for replies.

J

jason_bartell

Community Manager

Hi BGPictures,

What is your memory preference set to in Preferences -> Memory & Performance? We just made a change on Monday's beta build, version 22.3 build 89, where After Effetcts should honor this preference which we had been exceeding at times previously. First try increasing the amount of memory available to After Effects in this preference.

Thank you,

Jason

BGPicturesAuthor

Known Participant

Hi Jason. Thanks for looking into this. After effects never had less than 52GB in all of my testing. I've attached a screenshot of my current settings in 22.2, but this is what 22.3 looked like as well. Please let me know if I can provide any further info. Cheers!

BGPicturesAuthor

Known Participant

Hi @BGPictures,

We have fixed a number of issues with After Effects' memory handling, including an issue when using Dyanmic Link. Thank you for this clue; it helped us home in on the root cause! We made a change to force a minimum preview length so the "needs 2 or more frames" error should be gone as well.

Please re-test with AE beta 22.5 build 28 or later. Build 31 is currently available for install.

Thank you,

Jason

Hi @jason_bartell. I've finally had time to test. I'm on v22.5.0.43, and the ram bug is different: instead of bringing up an error dialog, it just plays 2 or 3 frames. I tried all configurations I could think of in the Preview panel, but get the same results. Even on quarter res and wireframe. Also, collecting the project does not fix the issue now.

Also, there was a fledgling alpha interpretation bug that I could fix by reinterpreting chproj to go from "straight" to "premultiplied". Now this workaround does not work and all my chproj seem to have "straight" alpha no matter what I set it to. I'll post this in a new thread -- just wanted to type it here in case you can refer me to a workaround.

Thanks!

Benjamin

BGPicturesAuthor

Known Participant

Update: I reverted to AE 22.2.0 (Build 105) and can once again ram preview as expected -- without encountering bug. Project/comp & cache settings are identical.

BGPicturesAuthor

Known Participant

I should have stated initially, that the workaround was using 22.2.0 non-beta, while today's workaround is using 22.2.0 (Beta). I assumed incorrectly that Beta and non-beta had different version numbers. Thanks!

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