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

[Gaspar Fernández]

Hi,

Me too, in my experience editing videos I have Blender, GIMP and 
avconv/melt scripts. The compositor is really useful and powerful but 
also missing some effects. I even think they would be easy to add, just 
a bit time consuming for developers. But a end-user would end up with 
hundreds of options, overwhelming for the shift-a menu (well that's 
another story).

Best regards,
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El 13/03/17 a las 08:15, Andreas Klostermann escribió:
> 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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>> Gaspar
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>>>
>>>
>>>
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