Browser's autoplay policy.

mediasoup-demo
1

RoomClient.js inside _joinRoom function. There’s a comment that reads:

			// NOTE: Stuff to play remote audios due to browsers' new autoplay policy.
			//
			// Just get access to the mic and DO NOT close the mic track for a while.
			// Super hack!
			{
				const stream = await navigator.mediaDevices.getUserMedia({ audio: true });
				const audioTrack = stream.getAudioTracks()[0];

				audioTrack.enabled = false;

				setTimeout(() => audioTrack.stop(), 120000);
			}

If someone knows what the comment means that would be really great. Because as far as I know, the browser won’t let you play any audio unless the audio happens in response to a user gesture, that is basically what the autoplay policy is. I would be interested in knowing what part does getting user’s microphone play.

Thanks.

2

That’s not playing any audio but just requesting mic permission, so after that, audio elements (for remote peers) are allowed to play sound.

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3

Alright. Does that mean removing this will mute all remote audio and we won’t be able to hear the PeerViews of participants?

I mean including the new ones that are created when someone joins.

4

Thanks @ibc. I just found this: https://webrtchacks.com/autoplay-restrictions-and-webrtc/ it has what you say. :+1:

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