On Sat, 2007-08-11 at 23:54 +0200, Herman Robak wrote:
> On Sat, 11 Aug 2007 23:28:35 +0200, David McNab <[EMAIL PROTECTED]>  
> wrote:
> 
> > On Sat, 2007-08-11 at 23:17 +0200, Herman Robak wrote:
> ...
> >>   Please consider if the motion estimation software written from
> >> scratch by Zachary Drew (http://www.tc.umn.edu/~drew0054/) is
> >> better suited.  It is probably faster.
> >
> > Might need a lot more work though. It appears (fwict) that it only
> > calculates the motion, and doesn't generated re-timed video frames.
> 
>   It is limited to one format, thus making it incompatible with
> Cinelerra's floating point colour.
> 
>   A lot of work will be required no matter what if the framerate
> resampler is going to fullfill its potential.  I'd rather have it
> integrated with the timeline UI than have it as an effect plugin
> only.  Then dragging edit points could slip, slide _and_ stretch.
> 
>   A motion estimator is related to a motion tracker.  They could
> probably work together in interesting ways.

Personally, I'm quite happy to re-time video segments outside of Cin,
then just import them into Cin. In fact, I've written a python front-end
which gives a simple interface and takes care of all the details, so it
can take a clip in any format at any fps, and convert it to a
high-quality .mov/mpeg4 with the desired fps.

Motion estimation is CPU intensive, far more so than even
camera/projector zooms. It's questionable whether this belongs in Cin at
all - whether on the Cin timeline or as a Cin effect. You'd never in
your wildest dreams be able to re-time and play in realtime in the Cin
viewer or compositor.

Cheers
David




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