aramg

linux-v4l2: Create & use an OBS specific loopback card

10

### Description Create and use an OBS specific loopback card by taking advantage of `v4l2loopback-ctl add` command. Fallback to any available option if that fails. ### Motivation and Context Improved...

NOTE: This PR includes the changes in #8008, which is expected to get merged first. ### Description Adds virtual audio support via the ALSA loopback module, `snd_aloop`. As implemented, audio...