[FFmpeg-trac] #2699(avcodec:new): automate lossless normalisation

[FFmpeg]

#2699: automate lossless normalisation
-------------------------------------+-----------------------------------
             Reporter:  feelart      |                    Owner:
                 Type:  enhancement  |                   Status:  new
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-----------------------------------

Comment (by feelart):

 {{{
 Does lame support setting gain?
 }}}

 http://ecmc.rochester.edu/ecmc/docs/lame3.98a2/switchs.html
 Yes, with the --scale switch, but haven't tested if it's lossless, as I
 use MP3Gain to batch lossless normalise my MP3 or AAC.


 {{{
 If it does support it, I suspect it is already working
 }}}

 Maybe it's due to my lack of deep understanding of ffmpeg, but I failed to
 make use of LAME switch directly.


 I do not know how MP3Gain does lossless normalisation of MP3 & AAC, but
 it's true that for MP3 it requires LAME and for aac it requires AACgain.


 It's also possible to normalize with SOX http://sox.sourceforge.net/
 but have never tried and at this stage don't know if LOSSLESS process.



 Also,
 http://gnormalize.sourceforge.net/ (RE-ENCODING !!)
 http://normalize.nongnu.org/ (re-encoding ????)

-- 
Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2699#comment:6>
FFmpeg <http://ffmpeg.org>
FFmpeg issue tracker