[Bf-committers] Blender tracking zoom solver

[Ichthyostega]

Am 25.09.2014 11:52, schrieb Sam Vila:
> Any idea when the tracking system in Blender is going to provide a zoom 
> lenses solver? I think the motion tracker is quite decent right now but not 
> being able to solve shots with zoom it really limits a lot in many 
> productions.

Hi Sam Vila,

from you're message it isn't entirely clear what you mean with "tracking".
Basically, there are two distinct workflows. You can reconstruct a 3D scene,
and then place virtual objects into it. Or you can extract the 2D motions
of given video footage, and use that for masking, rotoscoping or image
stabilisation in general.

Personally, was interested in the 2nd use gase, but I ran into several problems
while using the current 2D-tracker on more elaborate, real-world shots. Thus I
did a complete rework of the current tracker. My version can compensate zoom
quite well, and is also able to handle panning and travelling shots. More
complex rotation is still problematic though, but I basically have a plan how
to get that somewhat under control.

But currently I see the goal to get that reviewed and into the hands
of more users. Unfortunately the review process stalled, probably because
the core blender devs are overloaded with work.

The review process can be found here:
https://developer.blender.org/D583

For a demo video where I explain my reworked version and show how
to apply it on a real world shot please see here:
http://vimeo.com/blenderHack/stabilizerdemo

There is a theory/documentation page where I explain my concept:
https://github.com/Ichthyostega/Blender/wiki


If you're interested, you should probably join the "VFX" list,
which is focussed on video handling, effects, tracking, sequence editing etc

http://lists.blender.org/mailman/listinfo/bf-vfx


Cheers,
Hermann Vosseler
(aka "Ichthyostega")