Difference between Chronos Fast and Chronos

Topaz Video AI General
1

Hi I hope you are doing well !

I would like to know if some of you did the comparison between chronos and Chronos Fast to give me an opinion on which one would be the best to use in my use case.

I want to increase footage frame rate from 30fps to 60 and maybe 90 without slowing down the playback speed (no slow motion).

Thank you in advance !

2

Chronos is a general frame interpolation model suitable for FPS conversion or slow-mo. Processing speed decreases linearly with the number of generated frames.

  • If render speed is a factor for slow motion beyond 8x this is a good option if the Aion model is too time and system-intensive.
  • Gives good results for 4x slow motion or less.

Chronos Fast specializes in fast motion with larger changes between frames.

Can process faster than Chronos, but can be very similar at times as well. Worth doing a small test for render time savings.

3

Here’s a killer sample clip (As in: breaks the interpolation in undesirable ways) from a highly popular movie.
chr AI.zip (16.3 MB)
chr for Chronos, took about 60 seconds.
chf AI.zip (16.6 MB)
chf for Chronos Fast, took about 50 seconds.
apf AI.zip (15.5 MB)
apf for Apollo Fast, took about 38 seconds.

All of those turn out really bad.
apo AI.zip (17.7 MB)
apo for Apollo, took about 60 seconds and is still not perfect, but the least noticeable by far.
Aion looks about the same as Apollo, but takes a lot longer and all the motion has static grain in it.

All of these are run with slow motion set to 2.5X because they are originally 23.976 fps. Then I convert the images back into a movie at the increased frame rate. I’ve tested having TVAI interpolate directly to the desired FPS, and the outcome is the exact same. You MUST have “Duplicate Frames” “Replace” unchecked. It does not work and never has. If your video has duplicate frames, like a standard NTSC DVD, you must remove them before running TVAI on it.