Neil, it is what it is... actually it's a bit more complicated than that, since 1) several different video containers are listed, and most of those can hold video that compressed / formatted differently, & 2) the specs for each format generally refer to playback, so there can be quite a lot of technical difference between 2 videos of the same format. Add that companies like camera makers can develop their own versions of the video format their products use, Plus, complete specs for many streaming services along with DVD & Blu-ray require often expensive licenses with a binding NDA.

There are industry associations that come up with and publish various standards, e.g. for digital broadcast TV, though most enforcement / regulatory efforts ended with analog TVs [why for example HDMI doesn't pass through captioning, since CC is no longer required]. And there's obviously no regulations or enforced standards when it comes to online or streaming video -- one reason why every channel &/or service has its own app.

mike  –  Last year  –  Комментарий оказался полезным? да | нет (+9)

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