[Bf-committers] compositor-effect in sequencer

[Peter Schlaile]

Hi,

> Commercial compositing products have encountered and overcome similar
> limitations to allow for live usage in their sequencing and
> compositing pipeline.  One common approach is to apply your effects to
> a low resolution proxy for the live edit, another is to apply the
> effect to only the critical edit part 'live' (similar to your
> piecewise preview), another is distributed hardware, and a fourth is
> taking advantage of faster hardware (GPU, vector processing) on board
> the machine.  Also there will almost certainly be alternative
> algorithmic choices that can be made.

The first solution is already implemented in blender. Set the render
resolution in your sequence scene to say 320x240 and everything in the
pipeline runs at that resolution (even if the real input is larger, it
will get rescaled automatically). Turn of OSA and it is even fast... By
the way, we should definitely recode the ImBuf rescaler. If noone minds
I'll do it just like it is done in ppmqscale (bundled with libdv). It
boils down to linear interpolation the direct and fast way. (Making it
near realtime by the way.)

Regarding the adding of a direct compositor-plugin. I will first add IPOs
to external sequencer plugins. If you play a little bit with such a
feature more people (maybe including Ton ;-) may get the taste of a
IPO-driven compositor pipeline integrated into the sequencer workflow.

Greetings,
Peter

----
Peter Schlaile <peter at schlaile dot de>