RE LB ( https://sopuli.xyz/post/11143769 ):
ffmpeg is one of the few open source projects that is extremely well set up to take on this kind of request as a commercial contract - it's led by the team at videolan, and they are indeed a consultancy and will take on work for contract. but then you need to treat them like equals, business to business, rather than corporate overlord lackey to free labor open source maintainer weirdo.