[FFmpeg-trac] #7273(undetermined:open): Exported AAC does not work properly

[FFmpeg]

#7273: Exported AAC does not work properly
-------------------------------------+-------------------------------------
             Reporter:  DriverX      |                    Owner:
                 Type:  defect       |                   Status:  open
             Priority:  important    |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:  aac          |               Blocked By:
  regression                         |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by cracki):

 input:
 ffmpeg v4.3.1 says `Audio: dts (DTS), 48000 Hz, 5.1(side), fltp, 1536 kb/s
 (default)`
 VLC 3.0.11 says `3F2M/LFE`

 during encode, ffmpeg does say
 `[aac @ 000001a8e96a1400] Using a PCE to encode channel layout
 "5.1(side)"`
 and
 `Audio: aac (LC) ([255][0][0][0] / 0x00FF), 48000 Hz, 5.1(side), fltp, 384
 kb/s (default)`

 output:
 ffprobe says `Audio: aac (LC), 48000 Hz, 6 channels, fltp (default)`
 VLC says `Unknown-chan-mask`

 demanding `-af "channelmap=channel_layout=5.1(side)"` changes nothing.

 is there a workaround? I was hoping to at least be able to help ffmpeg do
 the right thing with some arguments/switches.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7273#comment:7>
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