CODEWITHSUNDEEP
node.jsaudiowebrtcgetusermedia
user13558124
user13558124

Reputation:

Why Is WebRTC Dropping Audio

I am making a video conferencing app where audio is very important. I just overcame a major hurdle (took me about 2 weeks out of a 2 and a half weeks of working on it), switching audio devices, but now when I go to test it on 2 computers and turn up my microphone the audio goes quiet. I then turned up the mic input, which worked for about the same amount of time before the volume dropped. I even tried setting autoGainControl to false, but that didn't seem to do anything. Is there an easy way to do this?

I have tried: noiseSuppression: false, (obviously autoGainControl), echoCancellation: false, channelCount: 2, latency: 0, all of which did not work. Here is the current code for getUserMedia:

                audio: {
                    echoCancellation: echoCancellationMASTER,
                    noiseSuppression: noiseSuppressionMASTER,
                    latency: 0,
                    sampleRate: 48000,
                    sampleSize: 24,
                    autoGainControl: false
                    /*autoGainControl: false,
                    channelCount: 2,
                    latency: 0,
                    volume: 3.0*/
                }

Note that the commented out code is what I have also tried, but am not currently using.

Click here for the github code

Any ideas are appreciated, thanks!!

Upvotes: 1

Views: 983

Answers (1)

Brad
Brad

Reputation: 163612

Firstly, go to chrome://webrtc-internals to ensure your constraints are getting applied correctly, in the way that you expect them to be.

Next, use a set of headphones on each to eliminate the possibility of feedback. This will help confirm the problem, which I suspect is some echo cancellation algorithm somewhere. Once you've confirmed that's the case...

Even though you set echoCancellation to false, and noiseSuppression to false, many devices still have their own "enhancements" for feedback reduction. I suspect this is what you're hearing.

If this is the case, then there really isn't anything you can do about it as a web developer. It's at a whole different layer apart from the browser. I often see this problem with Lenovo's Realtek drivers when using the microphone as a "communications" device, but have had the same issue on other computers.

Upvotes: 1

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