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Draft: Render supers

Vint Prox requested to merge render-supers into main

Working on #6: supers (upper thirds) of 3 kinds should now be pre-rendered.

Animation of the backdrop mask consists of moving gradient and pattern. We can reuse the same animation with different colors. Alas, Glaxnimate doesn't have an inverse masking, so thinking in grayscale instead of alpha channel was a last minute improvisation. It requires working with additional elements as a post-processing need: by supplying animation into Shotcut, using it as a mask to color background, and plastering icons over. Audio is attached, too. Shotcut is pretty much unavoidable, since Glaxnimate has trouble exporting to video formats, let alone via QTRLE codec, and I've got this conundrum with masking in Glaxnimate anyway... I'm open to suggestions here.

Usage

Here is a demonstration of how different supers look with text added to them:

Creative Freedom Summit 2024 supers demonstration

MLT file is provided as a source that you can open in Shotcut. Discover additional filters, to better integrate supers into your own video:

  • 1.5 s fade in on text
  • 1 s fade out on text
  • 1 s fade out on backdrop

As an added benefit of me using Shotcut, every MLT file is portable and can be imported to Kdenlive! I didn't notice any gain in quality compared to alpha MOVs, but, y'know, they are there in case you need to look into source (or if for whatever reason MOVs don't work).

Known issues

  • Whether you use MLTs or MOVs, there is always some sort of translucent veil of the color that gradient should have. I don't really know what resulted in this, but it's really nagging me. It can make video under it slightly change chroma...
  • No demos for Kdenlive yet, sorry.
Edited by Vint Prox

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