You also need synchronization to mix sources (common in any production) without incurring the latency and resampling of asynchronous sample rate conversion.
There’s also AES70, or OCA (https://news.ycombinator.com/item?id=46934318). More popular in audio than video, something of a competitor to NMOS (although there are parts of NMOS that were very much inspired by OCA). There are open source C++, Python, JavaScript and Swift implementations as well as some commercial ones.
That’s sad. One of the first pieces of (serious) software I wrote was licensed by HP for bundling with it. Didn’t use HP-UX a lot but it’s a pity we’re asymptoting towards a Unix monoculture.
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