filter to smooth playback?

[kinglerch]

I am versed using vDub, AviSynth, deinterlacing, deshaking, etc. But what I have now is a video that stutters. This is the way it was filmed many years ago and there's nothing I can do about it now...or is there?

Is there a filter out there to reduce stuttering video, blend frames, make it smoother? I looked but came up empty.

[edDV]

What format?

Your computer details are blank.

[jagabo]

Depends on what the problem is. Post a short sample.

[kinglerch]

I have an AVI from an old 8mm film that had problems during filming. It seems the reel was rolling around in the camera improperly and so the resulting film stutters as it is "missing" parts of the action. I could imagine a filter that would blend frames in some way to reduce this stutter. Does such a filter exist?

[epsilonalpha]

something like this maybe? http://forum.doom9.org/showthread.php?t=144271

[kinglerch]

Hard to tell. He seems to have done a lot with 8mm film to "restore" it, but not sure if his film suffered from stuttering or not. Is there some sort of playback smoother? Something I can set to a high value to create a more frame-blended result?

[jagabo]

There are certainly ways of removing duplicate frames, blending between frames, even motion interpolation between frames. But if the problems are random it won't be a matter of picking a filter and letting it figure out what needs to be done. You'll have to isolate the problem areas yourself.

[kinglerch]

Unfortunately, the problem areas are all over and too many to isolate. I was thinking something like "slow motion" on tv....where frames are blended together. I could try something like this to get a smoother result where necessary. I was just unable to locate a filter that is like this.

[poisondeathray]

How would a filter know selectively which areas to isolate ? Or did you want to apply it selectively to sections? Or do you want to just blend/blur everything ? Or motion interpolate everything ?

There are scripts that can detect dupes and fill them in with interpolated frames, but you still haven't described accurately what the problem is. Is the jerkiness from dupes, or decimated (missing) frames, or field order issue, or misplaced frames etc... ?

[kinglerch]

The frames are "missing", due to the film not properly threading inside the camera when it was filmed. So instead of someone running across the screen with all frames of film smoothly, the running is jerky and stutters due to these missing frames.

I would not expect a filter to know exactly where these "missing" frames are, nor how many frames are "missing". But if there was a filter to smooth motion, I could apply it selectively, in areas where it would help. Ideally with an intensity setting, so some areas could be smoothed more than others.

[poisondeathray]

One approach might be to use mvtools2 to generate missing "in-between" frames . They are not "dumb" blends, they are motion interpolated new frames. I don't know of anyway to autodetect where / how much or intensity , so you would not only have to specify the locations, but the number of frames to replace per section. So it will be quite a bit of work, but a lot less than something like photoshop

[jagabo]

One approach might be to use mvtools2 to generate missing "in-between" frames .

I think Sanlyn has done a lot of this. You should look at his posts.

[jagabo]

Here's a script for replacing bad frames with motion interpolated intermediates:

http://forum.doom9.org/showthread.php?t=128649

It might work here.

[poisondeathray]

I think that replaces existing damaged frames, not insert missing frames. (I guess you could insert a few blank frames, then replace them, or modify the function)

Note Gavino made some improvements to that Morph function:
http://forum.doom9.org/showthread.php?t=161154

[Gavino]

I think that replaces existing damaged frames, not insert missing frames. (I guess you could insert a few blank frames, then replace them ...

That's right.
A simple way to insert the additional frames (they don't have to be blank, of course) is to use DuplicateFrame() to repeat the frame before each missing one.