PipeWire is a server and user space API to deal with multimedia pipelines. This includes:
- Making available sources of video (such as from a capture devices or application provided streams) and multiplexing this with clients.
- Accessing sources of video for consumption.
- Generating graphs for audio and video processing.
Nodes in the graph can be implemented as separate processes, communicating with sockets and exchanging multimedia content using fd passing.
Technically, it’s not about the display technology, but instead about the signal/tuner. More specifically if it’s analog or digital. Some modern TVs still have analog or hybrid tuners for backwards compatibility and regions that still use analog, so they can display static. For instance, in Ukraine we finished the switch to digital TV only a couple of years ago. If your TV had no digital tuner (as was the case for many) you had to buy a DAC box. Retirees/pensioners got them for free, sponsored by the government.