Converting 25p to 50p with Twixtor

PeterDuke schrieb am 02.02.2017 um 03:19 Uhr

I wish to convert 25p video to 50p for smoother playback.

I am using Vegas Pro 13 and Twixtor plugin version 6. I started with the Twixtor default settings, which includes Warping: Inverse.

The worst problems I found were when shooting from the side of a moving vehicle. Although buildings came out reasonably well, street poles and the like became rather bizarre. A picket fence also messed up, but, like strobing generally, probably has to be accepted.

I tried playing with the settings but the only one that seemed to have an effect was the Warping parameter. With it set to Forward, the poles were much better, although not perfect, but the edges of the frame, particularly the sides, developed some dark grey artefacts.

I have put each of the above versions of a scene on Dropbox.

https://www.dropbox.com/sh/pkns2zdvyd0j6ga/AADNcmmj2Gnhy6ii3n1mgOBIa?dl=0

I thought of rendering both ways and masking each generated frame such that the centre from the Forward version and the edges of the Inverse version were kept, but that seemed like a lot of work. Also, it would fail when the pole reached the edge of a frame.

Does anyone have any better suggestions on how to improve on what I have done?

 

Kommentare

PeterDuke schrieb am 02.02.2017 um 14:36 Uhr

After looking at other examples I have, I begin to doubt that I can achieve my objective of getting smoother playback using Twixtor. It gives poor results when the pair of frames to be interpolated are quite different, and that is just when I most need the interpolated frame. If the frames are very similar, then I don't need the interpolated frame. For intermediate cases, however, it may be beneficial, depending on content.

Musicvid schrieb am 02.02.2017 um 18:19 Uhr

No experience, but I imagine Twixtor and jello shutters are not the best of friends.

PeterDuke schrieb am 03.02.2017 um 08:01 Uhr

Yes, Jello can be a problem too. Mercalli has a plugin for this but my one attempt to use it made no improvement. I must spend some time looking into it.

In my last post I was I was unduly pessimistic. I found plenty of clips with panning or that were shot from a moving vehicle, where the judder was markedly reduced. Only those clips with fast moving objects (such as poles) near the camera were unacceptable. Birds flapping their wings about 12 flaps per second were not helped either. (The videos started out as 24p from my "still" camera, which I sped up slightly but retained the number of frames.)