[FFmpeg-trac] #1792(swresample:closed): libswresample mono to stereo conversion is lowering the amplitude

FFmpeg trac at avcodec.org
Fri May 17 21:17:10 CEST 2013


#1792: libswresample mono to stereo conversion is lowering the amplitude
-------------------------------------+-------------------------------------
             Reporter:  albertzeyer  |                    Owner:  michael
                 Type:  defect       |                   Status:  closed
             Priority:  normal       |                Component:
              Version:  git-master   |  swresample
             Keywords:  regression   |               Resolution:  wontfix
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  1
-------------------------------------+-------------------------------------
Changes (by cehoyos):

 * keywords:   => regression
 * status:  reopened => closed
 * version:  unspecified => git-master
 * resolution:   => wontfix
 * reproduced:  0 => 1


Comment:

 The new behaviour is reproducible since release 0.9, apart from what
 Hendrik wrote above I believe there are two additional good reasons why it
 should not be changed again:
 {{{$ ffmpeg -i mono.wav -channel_layout 7.0 out.wav}}} would produce
 surprising output if we copy sox's behaviour (upmixing to more than two
 channels did not work before 0.9)
 The behaviour you want can easily be achieved using the pan filter.

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1792#comment:10>
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