Playing slowed down 120fps clips issue with fps

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n23
Posts: 4
Joined: Wed Feb 28, 2018 12:46

Playing slowed down 120fps clips issue with fps

Post by n23 »

Hello,

I've rendered some 120fps clips to have possibility to play them at slower speed while maintaining 60fps output.

But once I play the 120fps clip slowed down by 50% it looks like 30fps on the output. It looks the same as 60fps clip slowed down by 50%.

How can I make it work the way I intend?
Last edited by n23 on Fri Jun 08, 2018 19:00, edited 1 time in total.

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Oaktown
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Re: Playing slowed down 120fps clips issue with fps

Post by Oaktown »

Re-rendering a 60fps file a 120fps is not creating new frames so all you end up with is two of each of the original frames. In other words all you get is a file that's twice the size with no mechanical advantage!

What you need to do is create intermediary frames by using a program such as After Effect and the following techniques:
  • Frame blending (Frame Mix or Pixel Motion)
  • Time remapping or stretching
  • Timewarp effect
  • if you want to go all out, you can use Twixtor
Rather than increasing my fps, I personally prefer to increase the duration of my clips.

Take a look at this thread

n23
Posts: 4
Joined: Wed Feb 28, 2018 12:46

Re: Playing slowed down 120fps clips issue with fps

Post by n23 »

Oaktown wrote: Thu Jun 07, 2018 17:33 Re-rendering a 60fps file a 120fps is not creating new frames so all you end up with is two of each of the original frames. In other words all you get is a file that's twice the size with no mechanical advantage!

What you need to do is create intermediary frames by using a program such as After Effect and the following techniques:
  • Frame blending (Frame Mix or Pixel Motion)
  • Time remapping or stretching
  • Timewarp effect
  • if you want to go all out, you can use Twixtor
Ooops you are right, in my video I was 120fps but the animation had 60fps. I've missed some setting in TouchDesigner. Now I have a real 120fps animation and it works fine with 50% slowdown.
Oaktown wrote: Thu Jun 07, 2018 17:33 Rather than increasing my fps, I personally prefer to increase the duration of my clips.
That's an interesting idea, it easier to work with 60bmp-60fps as the base frequency, most screens can display that. The downside is that you always see movie previews in a slow tempo that is almost never played live.

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