Rotoscope Error and Unable to Freeze

[nknlbjknm_]

Hi all,

I've recently finished off a rotoscope for a 7 second clip; I've edited text onto a chopping board and rotoscoped the buns on top so that it covers the text. As each bun is taken away we see the text appear. It took a painfully long amount of time but I've finally got there. However, when I render the clip, the rotoscope mask appears to have not worked properly, even though in After Effects it looks perfect. (See screenshots below. I know it isn't the exact frame, but I've gone by frame by frame and they're all fine)

Rendered ClipRotoscope LayerClip in After Effects

I saw online that it is recommended to freeze the rotoscope so that it doesn't change and recalculate it. However, upon trying to do this, I get 2 errors. The first one being an "Unspecificed Drawing Error" and the second being a ram error saying something like "2614k requested". I know I dont have the beastiest computer in the world, but I thought it would be able to handle a rotoscope for a 7 second clip. 

Hopefully it's down to a silly mistake I'm making seeing as I'm new to this. If you need any other information, let me know and I'll provide it ASAP. Thanks!

PC Specs: 

Graphics Card: GeForce RTX 2060 6gb VRAM

CPU: AMD Ryzen 3600 4.20 GHz

Ram: 16gb

Overall WorkspaceRotoscope Layer

[Mylenium]

Turn off hardware acceleration and/ or fiddle with your graphics driver. Converting the clip to an image sequence may also help to prevent those pesky cache and decode errors.

Mylenium

[nknlbjknm_]

Hi, thanks for the tips. 

I've now updated my drivers and it seems the only errors I get now are the "need more ram ones", so I'm assuming this has to do with the fact the clip im editing is an mp4? Could you potentially explain how I would go about converting it to an image sequence and use it in After Effects? Or point me in the direction where I could learn more about it? From what I'm imagining (which is definitely wrong), wouldn't there just be hundreds of images in After Effects?

I don't particularly fancy spending another 12 hours rotoscoping all over again, but I assume it's possible to simply swap out the .mp4 clip to a different format?

Also, I've been unable to find any setting in After Effects that let's me turn off Hardware Acceleration, so I haven't been able to try that out yet.

Thank you so much for your help so far 🙂

[nknlbjknm_ · Accepted solution]

SOLVED: (kinda)

If anyone else is having a similar problem to me, I'll tell you how I fixed it. When trying to use a clip that was converted to an image sequence, I still had a lot of trouble with it. Instead, I duplicated my composition 4 times, and cut the clips into 2 second sequences for each composition. This allowed me to freeze the rotoscope and export it correctly. I think my computer just wasn't good enough to do the whole thing in one sequence.