[Ffmpeg-devel] BUG: AC3 encode volume is low

Pierre Marc Dumuid pierre.dumuid
Sun Apr 2 11:35:15 CEST 2006

I am filing a bug for:  AC3 encode volume is low
The page, http://ffmpeg.sourceforge.net/bugreports.php suggest emailing 
this mail list the bug, and doesn't give reference to the bug reporting 
system at sourceforge, but I will submit it here and there, (Note I am 
not on the mailing list).

If I have a wav file, and use ffmpeg to encode it to an ac3 file, then 
decode it to a wav file, the amplitude is greatly reduced.
I consider the problem in ac3enc...  Here are a list of web sites that 
discuss the issue:

 - I tried the -vol option, and I don't think it did anything (except 
possibly clip at a less than full dynamic range amplitude)

 - a person complains, i.e. "I would like to adjust the output AC-3 
volume, it is too low."

 - "yes ffmpeg lowers the volume"

- DSPguru at this place seems to think it is a problem with ac3enc, and 
he can see the issue, but doesn't have time to fix.

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