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Issue 838533 link

Starred by 4 users
Status: Available
Owner: ----
Cc:
█ crodbro@chromium.org
holmer@chromium.org
Components:
EstimatedDays: ----
NextAction: ----
OS: Mac
Pri: 2
Type: Bug



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WebRTC: audio quality issue on variable low bandwidth connections

Reported by silvia.p...@coviu.com, May 1 2018 
UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.117 Safari/537.36

Steps to reproduce the problem:
1. Set up a 2 endpoint WebRTC call
2. have one endpoint vary their bandwidth between 50 and 250 Kbps
3. audio breaks up and gets unusable

What is the expected behavior?
audio is prioritized over video, so the audio continues to work, even when the video's quality fluctuates; we don't care if the video stalls completely, but the audio should always get sufficient bandwidth to get through

What went wrong?
video seems to be prioritized over audio, which makes audio drop out sometimes

Did this work before? N/A 

Does this work in other browsers? Yes

Chrome version: 66.0.3359.117  Channel: stable
OS Version: OS X 10.13.4
Flash Version:

Comment 1 by silvia.p...@coviu.com, May 1 2018 

Sorry, I hit submit too quickly:

You can test with appr.tc or other video chat examples from https://github.com/webrtc/samples

Also, other browsers like Firefox Don't do a great job with this either.

I'm aware this is a challenging situation, but it should be possible to do better than what we're achieving right now.

Comment 2 by susan.boorgula@chromium.org, May 1 2018

Labels: Needs-Triage-M66

Comment 3 by guidou@chromium.org, May 2 2018

Components: -Blink>WebRTC Blink>WebRTC>Audio

Comment 4 by philipp....@googlemail.com, May 2 2018

Cc: holmer@chromium.org
Stefan, you might have an opinion on this. I guess your signal talk is a bit outdated by now :-)

Comment 5 by holmer@chromium.org, May 3 2018

Cc: crodbro@chromium.org
There are some things we can do to improve this situation, such as introducing a congestion window and better manage the send-side queues. Our plan is to look at that in coming quarters.

Comment 6 by kwiberg@chromium.org, May 4 2018

Status: Available (was: Unconfirmed)
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