Re: How to record audio from a live video (youtube via firefox) ?

Dear tuxic,

> I want to record the audio of a live stream video (youtube).

This sounds like more of a problem for ffmpeg, mpv or youtube-dl.

> Everything I tried resulted in audio files with constant or
> intermitted sine wave like sounds.

What have you tried? With Pulseaudio, you get "monitor" devices for each sink so you can record output sound. It's harder with ALSA, if I recall.

> I am using pure alsa. I don't want pulseaudio and with jack
> started firefoxs audio does not work.

That's probably because Firefox and Jack are trying to open the same ALSA devices?

But I thought modern Firefox depends on Pulseaudio, you have to build your own Firefox binary if you want ALSA.

Here is a question that may be of use, there is both a Pulseaudio and ALSA solution:

https://superuser.com/questions/597227/linux-arecord-capture-sound-card-output-rather-than-microphone-input

Best,

Frederick