Aion rendering out film style frame flashing has anyone else experienced this?

Topaz Video AI Bugs and Issues
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[If you are posting a new bug, please include the following]

  1. Aion rendering out film style frame flashing film style burn, usually in red and cyan hue at 8x slow (intentionally under cranking the model) the distortion appears on multiple camera models - at least it’s subtle and pretty, but not for everyone.
  2. This is consistent on M2 Ultra OS 14.5 and Top 5.3.1 and M3 Max
  3. No Logs or supports because render finishes
  4. Any screenshots as necessary - screen shots are attached and are copyrighted and only intended to help diagnose a technical problem.
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Screenshot 2024-09-07 at 22.42.56
Screenshot 2024-09-07 at 22.42.561920×976 86.5 KB

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Screenshot 2024-09-07 at 22.44.47
Screenshot 2024-09-07 at 22.44.471920×1027 69.1 KB

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Thank you for sharing this, I have sent it to the team for review and will follow up once I hear back from them.

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I have the same problem. I was using NVIDIA on a Windows PC a couple of months ago and did not have this issue with Aion, but I’ve not done any testing to confirm if it’s Mac-only. I currently have this issue on an M2 Ultra.

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Aion causes large magenta patches to appear in big areas of the output video on my Mac Mini M4 Pro, randomly every few seconds throughout the output video. I’ve tried everything: reinstalling (deleting plist), switching versions from 5.2.x to 5.5, testing all kinds of videos from different cameras, and combining it with other VEAI filters, changing GPU %VRAM , with or without low power mode, … The only conclusion I’ve reached is that it’s related to the processor and the source video resolution: it happens in 4K but not in FHD. This issue doesn’t occur on a MacBook Air M2. You should be able to reproduce it with any 4K video, which is why I’m not sending one. It would be very interesting to know if other users with this platform experience the same issue.
The SO version is macos Sequoia 15.1 (for both platforms).

I should also mention that Apollo doesn’t have this problem.

EDIT: This is exactly this previously reported bug I wasn’t aware of: Aion Slow motion unexpected artefacts?. It seems not solved. (M3 Max 64 GB, here M4Pro 64GB)

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Well, there are more reports of the same bug: Aion rendering out film style frame flashing has anyone else experienced this?

I see that all the cases occur on relatively powerful macOS systems with a large amount of RAM available for the GPUs. The maximum on my MacBook Air M2 (24 GB), where the model works, is 16 GB. So, I thought of testing Aion again by limiting the memory available for the GPU in my M4PRO. I just need to run:

sudo sysctl iogpu.wired_limit_mb=16384

This reduces the VRAM of the M4PRO to match what I have available on the M2.

And the glitches disappear (!!!?). It also works with:

sudo sysctl iogpu.wired_limit_mb=24000

I didn’t test further increases, but I restored the default value to see if the bug reappears:

sudo sysctl iogpu.wired_limit_mb=0

(In my case, that equals 48 GB, which is 3/4 of 64 GB).

And, yes, the bug reappears.

It seems evident that this is a memory-related issue, surprisingly due to excess memory (!!?). Perhaps Aion assumes a maximum VRAM limit of 24 GB, corresponding to NVIDIA 4090s, and exceeding that on higher-end Macs causes problems. It might also be related to other reported “Out of memory” bugs during other rendering stages.

Modifying iogpu.wired_limit_mb cannot be considered a solution. I hope these findings help the developers finally address this months-old issue, which renders the best Topaz interpolator unusable on Mac devices with higher memory capacities.

LAST NOTE: But just now, I remembered the ‘Max Memory %’ parameter in the settings. I lowered it to 10% as suggested, but the patches appeared also with default iogpu.wired_limit_mb so it’s no solution at all

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Maybe not. But THANK YOU for posting this! :clap: It finally solved a problematic video I was enhancing! This problem of color flickering has plagued me since early 2023 with one of the Apollo models on macOS.

Really appreciate your solution, as imperfect as it may be!

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You’re welcome, I’m glad that also it works for you.

Well, it’s a workaround, but it must be solved in the application, that’s why I wrote it like this, so that the developers wake up. I take this opportunity to remind them that it is still pending.

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It’s weird that changing the memory setting in Topaz doesn’t fix the issue. But I’m happy to use the newer frame interpolation models on my Mac! They’re incredible for framerate conversions and slow-mo.

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Yes, they are very good, but if you have FCPX, there are a bunch of use cases where is better than aion (with the new AI based frame interpolator).

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I’m getting the same issue, currently using M3 Max Macbook Pro with 64gb memory on Sequoia 15.0.1.

Magenta and Green flashes in quadrants making the footage completely unusable. I tried the memory limiting step at 24000 and didn’t have any success, trying now at 16384 just because it was the one that was there to see if there is any benefit.

Otherwise, any solution? Another workaround? Do i have to double process the footage just to get to the desired end result?

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