[FFmpeg-trac] #10230(undetermined:new): [Feature request] Dolby Surround/Pro Logic/II decoder

[FFmpeg]

#10230: [Feature request] Dolby Surround/Pro Logic/II decoder
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             Reporter:               |                    Owner:  (none)
  audiopreservationist               |
                 Type:  enhancement  |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:  dolby,       |               Blocked By:
  request, dolby surround, dolby     |
  pro logic, dolby pro logic ii,     |
  decoder                            |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Description changed by audiopreservationist:

Old description:

> I believe ffmpeg can encode DPLII, but not decode it. There are ''a lot''
> of old matrix'd movie soundtracks that have never been released in proper
> multichannel format, and modern AVRs don't support this technology. It
> would therefore be highly beneficial if ffmpeg could decode them, to
> ensure they remain playable forever.
>
> I don't know much about coding, but I found this thread on DPLII, which
> may be helpful for implementing the decoder:
> https://stackoverflow.com/questions/23713626/correctly-implementing-
> dolby-pro-logic-ii/23713627

New description:

 There are ''a lot'' of old matrix'd movie soundtracks that have never been
 released in proper multichannel format, and modern AVRs don't support this
 technology. It would therefore be highly beneficial if ffmpeg could decode
 them, to ensure they remain playable forever.

 I believe ffmpeg can encode DPLII, but not decode it. I don't know much
 about coding, but I found this thread on DPLII, which may be helpful for
 implementing the decoder: https://stackoverflow.com/questions/23713626
 /correctly-implementing-dolby-pro-logic-ii/23713627

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Ticket URL: <https://trac.ffmpeg.org/ticket/10230#comment:2>
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