General: ffmpeg was crashing on slate merge

[jakubjezek001]

Brief description

Slate could not be converted to prores 4444

Description

Old code was expecting to find codec profile name in tokenized profile name

Testing notes:

1. open testing nuke scene
2. add Slate node directly above writeRender node
3. to Extract review add prores output preset with prores 4444 definition
4. Add to the output prores profile tag with Add slate frame
5. publish locally >> all should be fine and prores should have first frame slate frame

[ynbot]

Task linked: OP-2898 ffmpeg crashes slate merge png to prores