[FFmpeg-trac] #11281(avfilter:new): "showwavespic" filter failed with very short audio (< 200 ms)?

[FFmpeg]

#11281: "showwavespic" filter failed with very short audio (< 200 ms)?
-------------------------------------+-------------------------------------
             Reporter:  Danny        |                    Owner:  (none)
  Weijermans                         |
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avfilter
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
  showwavespic                       |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by Danny Weijermans):

 Hi! I used your code now:
 ffmpeg -y -v debug -hide_banner -nostdin -nostats -i "s.wav" -lavfi
 "showwavespic" "s.png"
 and now it works!
 so what's the change? is -lavfi needed?
 If you use my code, can't you reproduce? :
 ffmpeg -i /Users/disjt/Desktop/s.wav -filter_complex
 "showwavespic=s=640x120" -frames:v 1 output.png
 I really need the 'mono' option (mix to mono), 'compand' to compress the
 dynamic range, and output a specific size: 8000x100
 Can you reproduce this?
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11281#comment:4>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker