Issue 9547: getstats results for simulcast are wrong and don't split up per ssrc
Reported by
philipp....@googlemail.com,
Jul 22 2018
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Issue descriptionWhat steps will reproduce the problem? 1. go to https://fippo.github.io/simulcast-playground/chrome (or clone https://github.com/fippo/simulcast-playground/commit/06abb9799bf7d33f0018d1b4d46e1ec766e39265) 2. watch the local framerate graph What is the expected result? the framerate is around 30fps What do you see instead? the framerate is 90fps What version of the product are you using? On what operating system? 69.0.3493.3 on linux Please provide any additional information below. The sample is using simulcast and presumably adds up the individual framerates. This is the wrong semantics as outbound-rtp stats are per-ssrc. Also there is just one ssrc showing up while three are sent. , Jul 22 2018https://bugzilla.mozilla.org/show_bug.cgi?id=1477548 -- firefox is probably also affected if the underlying engine doesn't split up per-ssrc. , Jul 23 2018Project Member
, Jul 23 2018This is actually a spec issue. The webrtc-stats specificaton doesn't describe how to do stats on multicast. There was an issue open on it, but we closed it because submitter wasn't pursuing it any more. , Jul 23 2018multicast -> simulcast , Jul 23 2018https://github.com/w3c/webrtc-stats/issues/318#issuecomment-361950882 has a pretty good explanation despite the title. Lets assign this to hbos? :-) |
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Comment 1 by philipp....@googlemail.com, Jul 22 2018