19

In Ubuntu, I want to record everything that plays through my speakers.

If I were to play a movie and a YouTube video at the same time, the tool would record the mix of both.

It should output as an .ogg or a similarly popular format. It must be free, ideally open source.

11

You can use ffmpeg; it can record system audio from PulseAudio (which is the default sound server on Ubuntu), the command line should be similar to this :

ffmpeg -f alsa -i pulse -c:a libvorbis output.ogg

If it isn't installed on your system for whatever reason, here's a command to install it on an Ubuntu system (should also work on Debian, enter your password if asked) :

sudo apt-get install ffmpeg

Note: I didn't test this; feel free to comment or downvote if the above command does not work.

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