Slow Motion, Decimals, and Duplicate Frames

Topaz Video AI Bugs and Issues
1

As of TVAI version 4.0.6 putting a decimal number for Frame Interpolation > Slow Motion introduces duplicate frames with Apollo Fast model.

For example, I have a clip originally at 24 fps with no duplicate frames. I set Video > Frame Rate to 60 fps, and Frame Interpolation > Slow Motion to 1.4 with Apollo Fast as the Model. I also check Replace Duplicate Frames with a sensitivity of 10 for good measure. The resulting file runs at 60 fps, but every 7th frame is a duplicate of the 6th frame.

This does not happen under regular Apollo.

I have not tested with Chronos or Chronos Fast yet, but will update here if I do.

2

Are you still seeing this in later versions of the app? Did you ever test it using Chronos or Chronos Fast?

1 Like
3

Yes, this is still an issue as of 4.0.9, which is the latest upgrade I have access to.

I just tested all four models, and the problem only appears with Apollo Fast.

Chronos, Chronos Fast, and Apollo all work as expected.

Let me know if you’d like example files.

4

Actually it doesn’t even need to be decimal slow motion – I have a clip that is 18 fps and when I change it to 60 fps using Apollo Fast with no slow motion, I get a pattern something like 6 normal frames, 1 dup, 2 normal frames, 1 dup, repeating.

5

Did you check the files in an external player / nle? The preview player in TVAI also duplicates frames when doing frame interpolation, although the preview file is okay when opened in an external program.

6

Yes, I verified the duplicate frames in QuickTime X and VLC.

7

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