After Effects 2021 - Roto Brush Propagation VERY Slow, Freeze is just as bad. 4K Video

Forum|Forum|4 years ago
July 9, 2021
3 replies
2550 views

Good Evening

I'm currently working in After Effects. I've applied the roto brush to my subject and now waiting for Roto Brush to finish it's propagation; however its incrediably slow to the point its taking hours at just a 1000 frames.

After which; I then click "Freeze" to be greeted by what seems a quick response but then slows right down at 500 frames.

Workflow:

Import 4K edited video from Adobe Premiere via Dymanic Link. Create a duplicate copy of the scene, Apply Roto Brush to my subject.

System Specificiations:

Intel Core i9-10900k @ 3.70Ghz
64GB DDR4 Ram
2 x Raided Samsung EVO Pro 1TB M.2 SSDs
1 x 2 TB Standard Samsung SSD
11GB GTX 2080 TI
Windows 10 Pro

What I have tried:
1) Moving the cache folders to my SSD away from C:\
2) Reinstalled Windows 10
3) Updated Latest Drivers

This topic has been closed for replies.

BlueCowStudiosAuthor

Participant

Hello All

I managed to speed up the process by converting the video file to Adobe Stock Footage. This reduced the file size from 1GB+ to 500MB.

I then put the video back into after effects and it pretty much solved the problem. It does leave some questions open though. Perhaps adobe should leave specifications on the type of file formats.

My MP4 came from a Canon 250D 4K. - Once converted using adobe premiere to adobe 4k stock footage preset that was it. Roto is quick now.

I still have questions on why after affects uses 48GB of ram.

J

Jordan Clay

Inspiring

This could be an issue on why things are messed up. However I would rather not have to convert all my files to another format, as this is just adding one more giant step for me. I am using Roto in pretty much every scene, so for a 3 minute music video think every 5-10 seconds im rotoscoping. Very unintuitive to have to convert all my files.

J

Jordan Clay

Inspiring

Roll back to version 8.1 this solved all my roto problems. I roto in 4k with 140+ frames now. Every other version above this my computer froze with rotoscoping.

Mylenium

Legend

Without any info about the contents of the project nobody can tell you much. Most of the time it simply boils down to people using RB wrongly, i.e. footage that does not have enough motion and patterns to properly detect and then the AI-based algorithms are trying to fix it forever because nothing is there. Point in case: You may simply be using the wrong tool for whatever you are trying to. Either switching to the legacy v1.0 or using different methods like conventional masking may be appropriate. Provide a screenshot/ sample frame as well as the pertinent info for people to make a final assessment on that.

Mylenium

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