Register playout-delay extension

[kevmo314]

Adds support for passing the playout-delay extension through.

I suppose we could also make this a default extension in pion too but I never got around to finishing this PR :( pion/interceptor#151

[Sean-Der]

@kevmo314 sorry I am just responding. I would like do this (would be cool to bring the latency down)

Since no clients send this today, I am tempted to have Broadcast Box set it. I don't know if we should have it on by default though?

[kevmo314]

@kevmo314 sorry I am just responding. I would like do this (would be cool to bring the latency down)

Since no clients send this today, I am tempted to have Broadcast Box set it. I don't know if we should have it on by default though?

Are you thinking a config option for Broadcast Box so outbound clients get it set? Curiously, my use case for this was actually to increase the latency to better take advantage of Chrome's jitter buffer.

[Sean-Der]

Yea! Maybe put an icon in the video player and let users adjust the latency as they want.

I think that would be super powerful. Then you aren't locked down by the publisher.