Apply low pass and high pass frequency filter using ffmpeg
Just a quick example that applies both a high pass and a low pass frequency filter to a video file using ffmpeg
ffmpeg -i input.mp4 -filter:a "highpass=f=200, lowpass=f=3000" output.mp4;
The frequency is set in Hz
so in this example we are filtering out all frequencies that are out of [200, 3000].