Support of alpha-channel in PNG for Apply LUT Keying

[Fu-Bama]

If Apply LUT filter would support LUT png's transparency, it could become a powerful Keying filter, one that can render perfect shadows and remove green-screen tint at the same time.
I suppose it's a very simple thing to tweak in the source code, just lookup 4-channels not 3, like now. Probably it could be done in 5 minutes (its in the "plugins/obs-filters/color-grade-filter.c"). Let me know what you think about my idea.

 

[Eki Halkka]

This sounds like it could work very well. A new LUT would be needed for each greenscreen setup, but that shouldn't be a big issue.

I imagine the workfkow would be something like this:

1. Record some greenscreen gootage
2. Key it using better tools e.g. in After Effects
3. Use the settings to process a lut

The lut would have all the sophisticated keyer processing baked in.

Nice.