[FFmpeg-trac] #4823(undetermined:open): Conversion from DTS/DTS-MA to AC3 results in 2 channels instead of 6

[FFmpeg]

#4823: Conversion from DTS/DTS-MA to AC3 results in 2 channels instead of 6
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             Reporter:  JohnGalt     |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  normal       |                Component:
              Version:  git-master   |  undetermined
             Keywords:               |               Resolution:
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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Changes (by jamrial):

 * keywords:  ac3 dts =>
 * status:  new => open


Comment:

 With the same mappings, try "-c:a:0 copy -c:a:1 ac3 -ac:2 6 -c:a:2 aac
 -ac:3 2" instead. Apparently the -ac option considers all the streams from
 the output file and not just the audio ones.
 I'm not sure if this is intended, so I'll keep this open until someone
 else can confirm.

 And again, i recommend you to use the libdcadec decoder instead of the
 internal dca decoder. It will allow you to decode all 8 channels from the
 dts-ma stream losslessly.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4823#comment:8>
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