[DONE] Threshold for Recompute Exposures

[Mads Juul]

The Problem.
I have made a storyboard animatic and exported it in Quicktime Animation lossless.
The Director together with an editor cuts around in my drawings and put in new sign with text where they need new storyboard drawings.
They Export an new Quicktime. But because of the NLE(I think it is AVID) is using a compressor when working. the frames in the quicktime is not 100% the same when it is the same drawing or sign there is on 2 frames. So the Recompute exposures doesn not work in this situation.

The Solution.
If a could set a some kind og threshold on the Recomputer exposures so it neglected small changes in the frames generated by movie compression.
-Mads

[Mads Juul]

Maybe I should have posted this in about tvp first. Is there somehow to obtain the this effect? with the fx stact contrast and the recompute afterwards?

[slowtiger]

Don't think this works. I had the very same problem and did it all by hand in the end.

Such a "timing video" or animatic would need to be uncompressed in best quality to make recomputing possible, but this is unlikely to happen since I get smallest file sizes with strong compression only.

[Mads Juul]

Nice to read I'm not the only one who has encountered this problem. And in a perfect world all my quicktimes would be lossless but I am often encountering compressed movie files.
So threshold(is this a good term?) on the recompute exposure would maybe be something?
Now every pixel need to be the same, but what if you could set the recompute exposures to see a pixel with RGBA 250 250 250 250 equal to a pixel with RGBA 255 255 255 255

[slowtiger]

I wouldn't trust an automatic process in this. Besides, video compression and the resulting artifacat can't be caught by simple averaging or thresholding, IMO.

Instead I propose another feature. When importing video, we often need to reduce the number of frames, but in an intelligent way. At least more subtle than a simple "every 2nd/3rd frame" which we already could achieve with the current timeline tools (shortening with stretch without interpolation).

So I'd like to have a tool to click on frames to mark them. I could go through a timeline quite fast and mark interesting frames (like for rotoscoping), then in the end run a script to change every marked frame into an instance, while changing everything after that (undtil next marked frame) into exposures of this instance.

[Paul Fierlinger]

Such a script sounds awfully close to youngmonkey's Marker/Tracker plugin for the purpose of coloring images and marking their instances. If the development team were to go ahead with this very desirable feature (in my opinion) it seems to be logical that they should make it work for both functions and hardwired to boot -- wouldn't that be just dandy!

[Mads Juul]

I have made a script attempt on the recompute here
viewtopic.php?f=11&t=5207