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

[Gaspar Fernández]

Hi Piotr,

Sure, I'll write some doc about how I did it, when I finish my day.


Saludos
------------------------------------------------------------------------

Gaspar Fernández

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El 13/03/17 a las 12:58, Piotr Arlukowicz escribió:
> Hi Gaspar,
> can you possibly share some knowledge how you did your patches or how were
> you able to create even the simplest effect? I'm looking for an entry point
> to VSE logic code but I'm still walking in the fog...
>
> cheers
> pio
>
> ​Piotr
> ​ Arlukowicz, BFCT​
>
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>
> 2017-03-13 5:00 GMT+01:00 Gaspar Fernández <blakeyed at totaki.com>:
>
>> 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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