[FFmpeg-trac] #3455(swresample:new): aresample=matrix_encoding=dplii doesn't downmix backleft and center correctly

[FFmpeg]

#3455: aresample=matrix_encoding=dplii doesn't downmix backleft and center
correctly
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             Reporter:  Peter       |                    Owner:
                 Type:  defect      |                   Status:  new
             Priority:  normal      |                Component:  swresample
              Version:  git-master  |               Resolution:
             Keywords:              |               Blocked By:
             Blocking:              |  Reproduced by developer:  0
Analyzed by developer:  0           |
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Comment (by cehoyos):

 The sample you uploaded is to short to do any test imo, I tested with a
 file that you should be able to find with Google:
 {{{
 $ ffmpeg -i Test\ AC3\ v2.0.avi -af "aresample=matrix_encoding=dplii" -ac
 2 out.wav
 $ ffmpeg -i Test\ AC3\ v2.0.avi -af "aresample=matrix_encoding=dplii" -ac
 2 out.ac3
 $ ffmpeg -i Test\ AC3\ v2.0.avi -af "aresample=matrix_encoding=dplii" -ac
 2 out.eac3
 }}}
 I now set my receiver to "PLII" and played the three files over the
 digital connection (HDMI): The surround sound sounded as expected
 (surround sound although I used stereo files). I finally tested the wav
 file over the analog connection and the stereo signal also played like a
 surround signal.

 Or do I misunderstand the problem?

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Ticket URL: <https://trac.ffmpeg.org/ticket/3455#comment:4>
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