[Bf-committers] External effects for VSE and or compositor nodes

[Andreas Klostermann]

The way I construct any effects which are not possible with the VSE is that
I run the footage through the compositor first, export it, then import it
again.

I found the compositor very useful for post production, though I have zero
experience with professional software dedicated to the task. Not to say I
don't consider Blender professional (it is after all used and developed by
professionals), but rather it's not dedicated to editing and enhancing
video footage. But I end up using the Video editing stuff in Blender more
than anything else ;-)

On Mon, Mar 13, 2017 at 5:51 AM, Troy Sobotka <troy.sobotka at gmail.com>
wrote:

> The VSE will be complicated developing effects under its current
> architecture. The problem is that the VSE is designed for output from
> Blender's 3D rendering largely, and that means that the values are scene
> referred. Most formulas for effects and such currently out in the wild are
> display referred, which means they won't work terribly well on scene
> referred renderings.
>
> With respect,
> TJS
>
> On Sun, Mar 12, 2017 at 9:00 PM Gaspar Fernández <blakeyed at totaki.com>
> wrote:
>
> > Hi all!
> >
> > There are only a few effects in Blender for VSE or compositor. I've been
> > thinking about that for years. Even I found, in the past Blender used a
> > C api to allow external effect plugins
> > (
> > https://wiki.blender.org/index.php/Doc:2.4/Manual/
> Sequencer/Effects/Plugins
> > ).
> > And don't know why this feature isn't supported now.
> >
> > Looking for a solution I tried to make my Blender build run image
> > filters via Python API but it's very slow (2 frames/sec for a very very
> > easy effect, inverting red and blue channels and alpha to 50%), also I
> > did not tested using a Python lib so Python will be just calling my C
> > lib which does the effect. But I think it may be better making them
> > directly in C or C++, I've tested doing the same simple effect in C and
> > it's realtime.
> >
> > I also thought about using a pluggable library for doing this (just
> > effects on images or videos), like MLT, where we can add a lot of
> > effects and image generators (another very very interesting feature for
> > me). It's really difficult to render a strip, apply one effect with
> > another program and import the new footage with effect, and sometimes
> > animating effect properties or doing little changes is awful repeating
> > the whole process again.
> >
> > What do you think about that?
> >
> > I've been playing with MLT source, if you think this is interesting I
> > think I could make a POC integrating one effect into VSE to see how it
> > behaves.
> >
> > Best regards,
> > ------------------------------------------------------------------------
> >
> > Gaspar Fernández
> >
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> >
> >
> >
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