[FFmpeg-user] Audio Meter filter

[Martin Vignali]

Hello,

I would like to show an audio meter from an audio file (something like what
edit software display
or like Audacity display)

I try the showvolume filter, but the result is not what i would like to
have.

My command line :
"C:\ffmpeg-20180329-af043b8-win64-static\bin\ffmpeg.exe" -i
"D:\RefSon100Hz_Son_PCM18_03_30_18h21m17s.wav" -filter_complex
"[0:a]showvolume=w=340:h=5:o=v:f=1.:p=1.:t=0:m=r:v=0[v]" -map "[v]" -c:v
qtrle "D:\resAudioMeter004.mov"

My input test file :
https://we.tl/X6L69kEWAN

Contains : 1000 Hz -12Db, then - 18 db, then 0 Db.

If i use the peak option, i have no difference between -12 and -18 db
And the "scale" is not what i would like to have (would like to have -12 /
- 18 Db more close to the max level

If i use the rms option, the scale is very low for all "level", and no
differences between -12 and -18 Db.

Is there another filter for that ?

Thanks by advance

Martin