You can already record audio from the playlist peripheral list ... True. So there are two ways of recording video but one way of recording 'only audio': viz. the playlist peripheral. The "Media > Open Capture Device" or "Media > Convert / Save" allows one to fine tune various pa...
When one opens the "Capture Device" tab of either "Media > Open Capture Device" or "Media > Convert / Save", the dialogue box lists "Video camera", "JACK Audio Connection Kit", "TV - digital", "TV - analog" and "Desktop"...
Been using VLC for about two decades - first in windows and then in linux. The best free opensource and versatile media player around. Thanks to all members of the VideoLAN team for a wonderful experience.