Add pipeline for image processing - also may solve memory issue

[janvarev]

Hi!

It may be good to add pipeline to image processing - for example, to use upscaler/face restorer after img making.

As an example, you can use this stuff: https://github.com/janvarev/chain-img-processor - there are framework, where pipeline stages adjusted as a separate plugins.

I've already implemented codeformer upscale/face restore, so it may be good to implement it in this project too.

There are two options to implement it:

• You can use ChainImgProcessor, and just replace img processing stuff, adding pipeline at end.
• Or you can use ChainVideoProcessor - it uses Richard's code, and effectively process video through pipeline in several threads WITHOUT need to load all frames to memory (I saw that there are problems with that Out of memory error when refacing #18 )

[xaviviro]

That's a great idea, it could have a lot of potential! I really appreciate the suggestion. It occurs to me that I could design it in such a way that more tools could be chained for pre-processing or post-processing.

Thnks!!!

[janvarev]

Just the notice - we increase number of plugins, so if you'll switch to this architecture, plugins for codeformer, gfpgan, gfpganonnx enchancement will be available (from https://github.com/RichardErkhov/Richard-roop )
(gfpganonnx near 10x faster then codeformer)