YN-0549: nuke intermediate baking RGBA creates black thumbnail

[ynbot]

Please describe the issue you have encountered?

The suspicion is that all channels will also bake into prores4444 mov more channels because that might be supported. And then ffmpeg actually convert it to png intermediate thumbnail file with alpha backed into it. So as you had mentioned only RGB channel setting is supported.

How to replicate the issue?

Testing with develop branch of core addon

1. Create Render Instance(e.g. RenderTestAlpha) and exposes channels in ayon+settings://nuke/create/CreateWriteRender/exposed_knobs change the channel to all or rgba
2. Publish
3. Check the publish of the render instance e.g. RenderTestAlpha in the server
4. You would find the black thumbnail created for that render instance

Testing with the branch of core addon

1. Repeat the step 1-4 above
   2.You would find the thumbnail created for that render instance

Additional context:

link to discussion on Discord
(might be a private channel)

_This issue was automatically created from AYON ticket YN-0549