Advice on using Twixtor OFX within Vegas needed

paul_w wrote on 9/11/2011, 1:54 PM
ok, so i am trying to use Twixtor OFX version within Vegas 10. I have been looking at tutorials, reading other forums etc. but still after hours of experimenting, i have never been able to get a smooth rendering of slow motion.
It seems so simple, import media, disable resample, apply Twixtor plugin, select the speed, render. Well for the life of me, this has never worked. It always looks choppy, never smooth.

Here is a link to a rough vimeo example i did last night just to illustrate the problem.
Any help would be appreciated.

Paul


http://vimeo.com/28890589Twixtor vegas problem[/link]

Comments

FrigidNDEditing wrote on 9/11/2011, 7:45 PM
there's interframe blending in your video which leads me to believe you have a setting wrong between your project and your media or something else.

I achieve good results w/o problem in Vegas, can you send the original problem footage or link it somewhere for me?

I do notice that your footage is potentially moving too far between each frame to allow for it to work correctly. If the distance between each frame is too high ( eg, you shoot at 24 or 25p and you are shooting high action and it's swinging fast, and your shutter speed is high, then you may very well, have problems just due to the fact that Twixtor can't estimate motion past a certain distance because it's just impossible at this time ).

Dave
paul_w wrote on 9/12/2011, 7:17 AM
Hi Dave,
Thanks fo the reply.
Well i just tried another go and updated the video on Vimeo. This is now shot at 60fps and twixtor reduced to 2% (this info is on the vimeo page now).
Its a lot better, but its still causing problems with stuttering.
The other thing seems to be i have to render out at 60fps. Well, thats odd, i actually want to render out at either 24 or 25. to match other footage in the project. Do you have this same problem? When i try to render out at say 25 (pal land here) the stuttering, or stepping is far worse, bigger steps. So rendering out at 60 seems to be the only way i get it smooth, well kinda smooth but far from good.

Paul.
edenilson wrote on 9/12/2011, 9:43 AM
I tested plugin speedo of genarts, and had resulted better, being also of easy manuscript.
paul_w wrote on 9/12/2011, 9:58 AM
edenilson: thanks for that, i just took part in the beta. How are you finding it compaired to twixtor?

Paul.
FrigidNDEditing wrote on 9/12/2011, 12:08 PM
I'll try and get some time on this tonight to help you out. I've used speedo, BCC, Twixtor, and AE's time re-maping tools. I prefer twixtor to all of them, but since I have twixtor in Vegas, sometimes I still use AE's because it's right there and I can just use it while doing something else in AE, but I never got better results with Speedo then I did with Twixtor, Speedo did do remarkably well though with eliminating distortion around the moving object.

Dave
paul_w wrote on 9/12/2011, 5:08 PM
Dave, i could be getting closer to getting this to work. Your comment about spacing between frames being too large could be the answer. My thoughts at this time are this: treating Twixtor like a real high speed camera is wrong. It seems to only work if you shoot movement thats not too fast, like someone walking or a normal moving car, but not fast. Then apply Twixtor to give the super slowmo. But as with a real high speed camera, you can shoot fast moving objects and then slow them down. Seems to me that you have to think differently when using Twixtor. ie. Twixitor will slow down objects as long as they are not too fast to start with - unlike a high speed camera.
Would this line of thinking be correct in your experience?
So, applying this to the test video currently on Vimeo, i dont think its possible to get it any smoother, because the pen in Susanne's hand is moving too fast for Twixtor ie the frames are too far apart. Thats my theory!
Also, i signed up to the beta version of Speedo, but i have not received the email link for download yet, so i cant even try it.

Thanks again for your help everyone.

Paul.
FrigidNDEditing wrote on 9/13/2011, 1:19 AM
Yup, what you're saying is pretty much right on the money in my experience. It has to have enough information to move it around, and while they say high shutter speed and low/no motion blur, if the movement is still so fast that it's creating a high degree of separation in the frame, it might actually be beneficial to drop the shutter speed then, and get a bit more motion blur in there for smoothness ( not that it will really make it look more realistic ).

Dave
paul_w wrote on 9/13/2011, 7:11 AM
Dave, thanks for the confirmation. Like a light bulb going on in my head.
Will try some tests using slower shutter speeds too and see what effect that has with twixtor.
Last question: rendering. Are you able to render out at either 24 or 25fps? or if you shoot at 50 or 60 fps, do you have to render out at that speed also. The reason i ask is i get better smoothness rendering out at 50. If i render out at 25 (pal land) it doesnt seem to handle the frame distance as well. Any thoughts about this.

Thanks
Paul.
edenilson wrote on 9/13/2011, 9:27 AM
I very found the speedo better that the twixtor. although being beta functions perfectly. twixtor constraint very vegas.