[FFmpeg-user] Frequency response of an ffmpeg equalizer filter

Nicolas VAMBAIRGUE nicolas2020 at nv76.info
Fri Jun 26 16:17:08 EEST 2020


I'm starting to use the ffmpeg filters, using the documentation. It 
seems working but, I don't find the way to get the frequency response of 
a filter. For example, let's say I'm applying this filter :


in the following command :

ffmpeg -re -i /home/dr_click/live.wav -acodec pcm_s16be -ar 44100 -ac 2 
-f rtp -af 

It works, I'm hearing a distorted sound. And what I'd like to know, with 
such a filter, is the db gain for the 2000 Hz signal or for the 150Hz 
signal or any other frequency with a query like : give me your frequency 
and I'll tell you which gain is applied at this frequency with the 
defined filter.

Thank you for your help,


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