I would like to know the minimum and maximum values of these filters in FFmpeg and ideally the step of these filters.
- equalizer (https://ffmpeg.org/ffmpeg-all.html#equalizer)
- lowpass (https://ffmpeg.org/ffmpeg-all.html#lowpass)
- highpass (https://ffmpeg.org/ffmpeg-all.html#highpass)
- bass, lowshelf (https://ffmpeg.org/ffmpeg-all.html#bass_002c-lowshelf)
- treble, highshelf (https://ffmpeg.org/ffmpeg-all.html#treble_002c-highshelf)
I am asking specifically about the Q-Factor value for each filter. I've checked the FFmpeg documentation online but there is nothing about these values. I did not find anything on the web either.
Are these values same for each filter? Are the values from 0.1 to 100? Stepping is 0.1 or 0.01 or floating point?
I am trying to create an EQ and need to set the min/max limits and the stepping in the frontend and would like to avoid crazy numbers that would either not work or generate bad outputs.
