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Old 09-06-2010, 12:26 PM   #1
eantoranz
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Registered: Apr 2003
Location: Colombia
Distribution: Kubuntu, Debian, Knoppix
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mplayer/oggenc from dvd: why does it produce output with varying volume levels?


Hi!

I noticed that one DVD I encoded to ogg (vorbis) resulted in files with varying volume levels (some files have sound much softer than others... and the original DVD is not like that). I wonder if it's mplayer or oggenc's fault.

I do it like this (suppose):

Code:
for i in 01 02 03 04 05 ; do mplayer-vc null -vo null -ao pcm:filename=$i.wav dvd:// -title $i-$i; oggenc $i.wav $i.ogg; rm $i.wav; done
I'm doing it by memory so I could have a mistkate or two in the sequence of commands but the idea is very simple
- Output the sound to a wav file using mplayer
- Encode it with oggenc
- Delete the wav file.

Why is the result having varying volume levels?
 
Old 09-07-2010, 09:43 PM   #2
whansard
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Registered: Dec 2002
Location: Mosquitoville
Distribution: RH 6.2, Gen2, Knoppix, 98,2000 + various
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maybe mplayer has dynamic range compression on in the config.
 
  


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