The time when there was only NTSC, PAL and SECAM will one day be remembered as the time of great clarity.
Today we have perfect chaos.
As many resolutions as you want, 8bit/10bit/12bit quantization, 4:4:4 ; 4:2:0 ; 4:1:1 ; 4:2:2 …etc
And as many frame rates as you want from 23.97fps to 60fps and more.
As the number of technical possibilities increases, the education/training of media people seems to decrease.
The result is a particularly annoying phenomenon that occurs when footage is shot in 24 or 25 fps, but then somehow 30 fps is supposed to be made out of it. (or the opposite process is the case)
Then every 4th or 5th frame is doubled (or removed), resulting in a stuttering of the movie commonly known as JUDDER.
Is there a model in Topaz that recognizes and removes the doubled images so that you can then convert from e.g. 24 to 60 fps?
I think they attempted to have a resolution to judder with the ‘replace duplicate frames’ check box in the interpolation models, but it has never worked. (It dose to something, but in all the videos I have tried, it makes things worse.)
You can try it out, and maybe you will have more luck than I have.
If they were to make a new model, specifically to solve for those two situations, that would probably be better.
The solution lies not with VEAI but with AviSynth.
Usually this is treated by running detelicine filters on your source. It is non-destructive, but only works if you have access to the proper telecine’d source. Detelecine can performan decimation in multiple formats: 3:2 (29.97 to 23.976) or 25:1 (25 to 24) for instance.
If you only need to remove duplicate frames, TDecimate alone will do the trick, or you may even use SelectEvery to remove 1 frame every N.
In other cases, SRestore works great when it is needed to switch from one frame rate to another in a more complex ways.
