[FFmpeg-trac] #1474(undetermined:open): Some audio encoders stopped encoding strange channel layouts

FFmpeg trac at avcodec.org
Sun Jul 8 17:07:10 CEST 2012

#1474: Some audio encoders stopped encoding strange channel layouts
             Reporter:  dcoffey3296  |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:
              Version:  git-master   |  undetermined
             Keywords:  regression   |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  1

Comment (by Cigaes):

 Probably. But then we need to have heuristics to decide when a conversion
 is completely safe, safe but inefficient, unsafe. That is becoming quite

 But even so, it is not clearly the right thing to do. With the file we
 have here, there are ~50% chances that what the user really want is
 {{{-filter_complex '[0:1] [0:2] amerge'}}}.

 If I am in a ten-floors building and get on the elevator on the 7th floor,
 I do not want it to start going down immediately, even though it is
 ''probably'' the right decision: the time wasted when it is wrong and I
 did not stop it in time is much worst that the time gained by not pressing
 a button.

 The same goes for programs that automagically decide what to do with any
 given input: there are inputs where we really do not have enough
 information, and it is best to just let the user decide.

Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/1474#comment:20>
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