getUserMedia

I should say this is on Safari Version 11.0 (13604.1.38.1.6) High Sierra 10.13 beta

On Mobile Safari iOS11.0 I am having less luck. I can not get it play back even silence

J

Well let me answer my own question. The issue was not what I thought it was. The data coming back was PCM and it was no problem to convert it to wav. The real issue was that there was no sound data in there. This is because the audio device that was auto selected was the first device on the machine (not the "selected" audio input). In my case it was a mac mini, and though it shows up as audio input, there is no input to it. So it was capturing silence.

I could select another audio device and then capture and record the audio. But (I think) after I updated to the latest High Sierra Beta it seems to only ever capture from the first input device.

Honestly the whole thing is quite delicate and it could be a comibination of seemingly unrelated factors that are breaking it. I am able to capture the audio off iOS11 Mobile safari ok, but it also quite fragile and I may have been simply lucky to stumble upon the correct bag of setings and sequence.

Not trying to interrupt this conversation with yourself, but could you post your code?

I'm also receiving no audio. I realized this is because onaudioprocess is never triggered... Seems you got this part working, so your help would be appreciated.

To help with the discussion, here is my code (working in Android and in chrome on windows, but not on my iPhone):

var AudioContext = window.AudioContext || window.webkitAudioContext;
var context = new AudioContext();
function beginRecording(stream) {
  microphone = context.createMediaStreamSource(stream);
  processor = context.createScriptProcessor(0, 1, 1);
  processor.onaudioprocess = function (event) {
         ...
  };
  microphone.connect(processor);
  processor.connect(context.destination);
}
navigator.getUserMedia({audio: true}, function (stream) {
   var recording = beginRecording(stream);
}, function (error) {
   ...
});

BTW, I hope everything I did is according to this forum's guidelines, this is my first post here. 🙂

It took me a good few days to work out that

new AudioContext()

has to be called from a user input handler eg a button click. It needs to be called before getUserMedia as this returns a Promise and every piece of code that runs here on after is seen as automatically scripted, which results in the context remaining suspended.

I have a working demo here: https://github.com/danielstorey/webrtc-audio-recording which works on iphone.

I hope that helps you guys.