Specifically it's using ffmpeg's showcqt[0] filter, which I find to be by far ffmpeg's most beautiful/comprehensible frequency visualizer. In my example `-i ":0"` refers to my microphone at index "0". To find your system's microphone index you can run `ffmpeg -f avfoundation -list_devices true -i ""`.
Nice, thanks, just tried it, that's quite cool, saving it for later!
Any reason you are running the filters within the `mpv` command vs within the `ffmpeg` command? I honestly have no idea which way is "better" if any, I think underneath both actually use `libavfilter` library?
They’re both the same really! Though I prefer doing the visualizing in mpv because than it’s easier to switch to different visualizations at runtime. With my mpv config I have obscure keyboard shortcuts that'll switch between different ones. But also possible to do it without mpv entirely.
here's a screenshot: https://dl.dropboxusercontent.com/s/yx5rlgpsmai3kej/showcqt_...
[0] https://ffmpeg.org/ffmpeg-filters.html#showcqt