• Compression Techniques

  audio level check with ffmpeg

  Posted by Jay Gustafson on January 27, 2012 at 5:23 pm

  I’m looking to write a script that will check the audio mic level of my mpeg recordings. If there a way to have ffmpeg report the audio level (in dB for example)on a frame-by-frame basis so my script can verify the audio level?

  Michael Rampe replied 14 years, 6 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Michael Rampe

  January 30, 2012 at 10:19 pm

  I use SoX for this operation.
  https://sox.sourceforge.net/

  A command like:
  $ sox $INPUT -n stats 2> stats.txt

  …will give you a lot of useful data. I found that you get quite inaccurate results on some recordings due to subsonic non-vocal frequencies.

  You can also use SoX to filter these out such as:
  $ sox $INPUT -n -D highpass 100 stats 2> stats.txt

  Let me know if this helps.

  Michael

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