Markus

Any chance to support aggressive nomination?

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## Summary I believe pion/ice is using _regular nomination_ at present, right? With aggressive nomination, if one of the networks goes down (or the highest priority pair disconnects for some...

Add decoder support for pixel format BGRA & ARGB

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#### Description This PR adds decoder support for pixel format `BGRA` & `ARGB`, and enables them in pkg `avfoundation`.