A

Anonymous

Answered

Interpolate missing frames with optical flow? 25p in 50i timeline

I need to edit some 25p clips in to an interlaced 50i timeline for broadcast.

The shutter speed was quite fast, so ist stuttering like crazy.

Is it somehow possible to use optical flow to make it look right?

If I leave retime to 100% and select optical flow nothing happens - as expected as the speed does not change.

Do I maybe have to interpret 25p as 50p, then insert and slow down again to use optical flow?

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Correct answer

By the way: My suggested workflow seems to work.

Modify->interpret footage as 50p.

Then slow down the clip by 50% using optical flow.

After rendering it gets much smoother.

I would hope there would be an easy option to use optical flow even without speed change.

If you do this AFTER the edit, it shifts all your audio clips in the timeline.

And Optical Flow introduces lots of artifacts, so I dont think this is a good workflow.

Community Expert

Optical flow is designed for speeds changes.

There are no speeds changes nor missing frames with 25p in a 50i timeline as 50i is 25 fps interlaced.

Try rendering the timeline.

A

Anonymous

I know, thats why I said "as expected".

But still the process of rendering additional frames is exactly the same.

So I was hoping for a good workaround.

Rendering the timeline unfortunately does not help - exporting doesnt either.

A

Anonymous

Correct answer

By the way: My suggested workflow seems to work.

Modify->interpret footage as 50p.

Then slow down the clip by 50% using optical flow.

After rendering it gets much smoother.

I would hope there would be an easy option to use optical flow even without speed change.

If you do this AFTER the edit, it shifts all your audio clips in the timeline.

And Optical Flow introduces lots of artifacts, so I dont think this is a good workflow.

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