system audio recording is not available

[tusharojha]

Hi there
I find this project interesting and helpful but at one point it's lagging i.e. system audio recording. This means if I am playing some video, song, alerts then they should be recorded with it.
Currently, the output is not having any audio.

Can you please help me with this issue.
Thanks

[daltonmenezes]

Hi @tusharojha , this is expected. Audio isn't supported yet, PR welcome.

[alectrocute]

Not possible currently on macOS or Windows without third party software for audio patching.

[aliafshany]

Not possible currently on macOS or Windows without third party software for audio patching.

https://github.com/ExistentialAudio/BlackHole

[proxybee]

I have added audio to this, will like to know if you're open to contributions. Thanks

[daltonmenezes]

@proxybee Sure, contributions are always welcome. I have no more plans to electron screen recorder as it is, it will be replaced in a near future to Astro, but I can take your contribution here to make the audio possible also to Astro. When Astro is released, this repository will be archived.

[ldenoue]

@daltonmenezes to add audio, I ask for getUserMedia again and add the audio track to the desktopCapturer stream.

let stream = await navigator.mediaDevices.getUserMedia({
    audio: false,
    video: {
      mandatory: {
        chromeMediaSource: 'desktop',
        chromeMediaSourceId: mediaSourceId,
      }
    }
})
try {
    audioStream = await navigator.mediaDevices.getUserMedia({audio:true})
    audioTrack = audioStream.getAudioTracks()[0];
} catch (eaudio) {
  console.log('no audio allowed')
}
if (audioTrack)
  stream.addTrack(audioTrack);

and then to stop grabbing the audio:
stream.getAudioTracks().forEach((t) => t.stop());