[FFmpeg-trac] #5072(undetermined:new): Weird filter error: Not connected to any destination

[FFmpeg]

#5072: Weird filter error: Not connected to any destination
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             Reporter:               |                    Owner:
  michael.heuberger                  |                   Status:  new
                 Type:  defect       |                Component:
             Priority:  normal       |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by llogan):

 This command is a mess. Some hints:

 * Please provide the most minimal command that allows us to reproduce the
 issue. Remove options until you find the option(s) that are required to
 reproduce the issue.

 * Even better if you can reproduce the issue with `-f lavfi -i
 testsrc=d=10 -f lavfi -i sine=d=10` as your video and audio inputs so we
 don't have to download inputs.

 * Provide a command that we can simply copy and paste.

 * Provide the full, complete, uncut, untrimmed console output without
 `-loglevel` (unless requested).

 We have so many bug reports and we are just volunteers, so making things
 easier for us will result in faster answers with a minimum of back-and-
 forth.

 ----

 That being said, why are you using `-ar -1`?

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Ticket URL: <https://trac.ffmpeg.org/ticket/5072#comment:8>
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