When are RTP stream stats created?

[henbos]

Originally part of issue #643. See also When are RTP streams destroyed?

Spec currently says when the SSRC is known. Seems to match implementation.

Proposal: Keep it this way

[fippo]

we need to resolve #619, no?

[henbos]

we need to resolve #619, no?

If we decide to keep the spec as-is, yes. Let's get agreements and clarifications first.

[henbos]

Slight nuance change in #671 to match Chromium. The alternative would be to update the implementation to hide RTP stats objects until packetsSent > 0 but with today's implementation the criteria for whether or not to expose an RTP stream stats is whether or not the SSRC is known (not whether or not packets are flowing). And the SSRC is known at different points in time depending on whether or not the SSRC was signalled.

[henbos]

Update: I think we should abandon the PR and the spec's sentence exactly as-is.

[henbos]

TPAC: Decision to go in this direction, but some concerns about backwards compatibility, so implementations may want to add a killswitch or experiment.

[henbos]

With the outcome that implementations should be updated, I think we can close this spec issue. If there are any implementation/shipping hurdles that warrant revisiting this we can always re-open it in the future, but closing for now.