[FFmpeg-trac] #1454(undetermined:closed): FFMPEG Volume not working as documented

FFmpeg trac at avcodec.org
Sun Jun 17 13:47:34 CEST 2012

#1454: FFMPEG Volume not working as documented
             Reporter:  ramitbhalla  |                    Owner:
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  unspecified  |  undetermined
             Keywords:               |               Resolution:  invalid
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
Changes (by ubitux):

 * status:  new => closed
 * resolution:   => invalid


 Replying to [ticket:1454 ramitbhalla]:
 > Summary of the bug: What's the right syntax for -vol
 > When I run ffmpeg -h the documentation says:
 > -vol volume         change audio volume (256=normal)
 > So if I want to double the volume should I use 512 and to half should I
 use 128?
 > The website: http://ffmpeg.org/ffmpeg.html#volume

 Careful, this is the audio volume filter, not the -vol option (the -vol
 option will transparently insert a volume audio filter, the option is just
 kept for backward compatibility, and as a simpler way of changing the

 -vol 512 should indeed double the volume.

 If you want to use the volume audio filter, use -af volume=2.0 (for

 Please re-open this ticket if you believe something is still wrong, or
 open another one if you think something can be improved in the


Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1454#comment:3>
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