How to double frame number keeping same duration?

[Steve Cohen]

Pierre,

I want to do much the same thing in AE and am running into a strange problem.

I’ve put together material transferred from 8mm home movies — it’s a tiff sequence that I’m treating as an 18 fps clip. Many, many cuts, thus many, many layers in the AE comp. (Should have done it in PP, but with 165 edits and color correction on each one, I’m not eager to start over.)

Composition plays fine at 18 fps. But the slow frame rate is distracting. So I nested the whole thing into another comp at 24 fps. I apply Twixtor to the single clip in that comp, set the input frame rate to 18 to match the nested material, and set 100% speed. This plays way smoother than at 18 fps with very few artifacts (amazing — thank you). But there are artifacts at the cuts. So I set the display to source, keyframe all the cuts, and set back to twixtored output.

But it doesn’t work. The cuts are marked correctly, but Twixtor still creates artifacts over the cuts.

What am I doing wrong?

Many thanks for producing such great software and for being so generous with your time here.

Steve

[Pierre Jasmin]

Ulrich,

Um… it’s just straight h264 MPEG in Quicktime
I swap the movie for .mov animation codec

https://www.revisioneffects.com/bugreports/prem/CS6PremProj3.zip

And I just figured the speed issue with Premiere, if you type 200% in Speed in Premiere, it becomes 199.8, you have to redo and type again 200.0 then you don’t loose a frame… (same in CC)

Pierre
RE:Vision Effects

[Pierre Jasmin]

Here’s a sample project
https://www.revisioneffects.com/bugreports/prem/AE_FPS.zip

I made a movie FakeEdit here with number, assume in your case it’s your footage and that comp does not exist

What works in this case in AE is

1) Drop the 18 FPS movie in an 18 FPS comp and set Twixtor to 100%, do the Mark Segments here (of course remember to set Input FPS to 18)
2) Drop that comp into a 30 FPS and render
AE will also properly resample audio like that

Pierre

[Steve Cohen]

Pierre,
Just tried it and did not have success.

1. 18 fps cut sequence, call this V1
2. nest V1 into V2, also set 18 fps. Apply Twixtor. In Twixtor, set 18 fps input frame rate and 100% speed. Mark cuts.
3. Nest V2 into V3, set to 24 fps. Cuts still have same artifacts.

Any suggestions?

Thanks again,
Steve

[Pierre Jasmin]

Steve,

Do you agree my project works?

Is it possible to send a short version (a few cuts) to techsupport at revisionfx.com ?

Pierre

[Steve Cohen]

Pierre,
Yes, the sample project works for me in Premiere.

I will create something and send it to your attention at techsupport@revisionfx.com.

Unfortunately, the media is a tiff sequence, so I don’t know if I can get it small enough to email. We’ll see.

Thanks —
Steve

[Pierre Jasmin]

Steve, did you mean AE? (I made an 18 FPS to 30 FPS project in AE for you)

If you hit the contact form in Support on our site, it will reply with an automatic message with an FTP dropzone (yousendit, dropbox, google drive… all work too)

Pierre
RE:Vision Effects

[Steve Cohen]

Pierre,

I created a short test project and couldn’t reproduce the problem. Then I went back to my original project and looked more closely. Many of the ‘mark segments’ keyframes were between two frames. I believe this happened when I took that sequence (the middle sequence of the three nests) and converted it from 24 fps to 18 fps. Very strange to see a keyframe in the middle of a frame. In any event, I went through all the keyframes and moved them to frame boundaries and I believe that has fixed the problem. I am exporting the whole thing and checking.

Again — many thanks for your help,
Steve

[Steve Cohen]

That did it. All is good. (And yes, this was with After Effects. In the earlier post, I was referring to the PP project that you attached to your post, which worked for me. Sorry for the confusion.)

Again, thanks for your help, and for making such a terrific product.

[Steve Cohen]

Pierre,
Is the procedure the same if I’m working entirely in Premiere?

If I want to convert an edited 18 fps sequence to 24 with twixtor — would I nest the 18 fps into another 18 fps seq at 100%, then nest again into a 24 fps sequence? Or do I have to tell it to run at 75% somewhere?

Steve