[FFmpeg-trac] #10226(avfilter:new): Filter commands no longer work

[FFmpeg]

#10226: Filter commands no longer work
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             Reporter:  Gyan      |                     Type:  defect
               Status:  new       |                 Priority:  important
            Component:  avfilter  |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 Runtime commands sent to avfilters return ENOSYS with all the filters I
 tested.

 How to reproduce, e.g:
 {{{
 %  ffmpeg -i input -vf drawbox at test=w=100:h=100:t=fill:c=yellow output
 }}}

 Once running, press 'c' and input `drawbox at test -1 c red [Enter]`

 ret is -40.

 Contrast with 5.1.2 or earlier, where ret is 0 and the changed color can
 be seen in the output.

 The culprit is
 f17051eaae278c6683492c037e5a1658ace64bec
 "lavfi/graphparser: reimplement avfilter_graph_parse* using new API"

 Probably in conjunction with
 4310b66b985e5d8f4463639c007d876e4439e7a9
 "lavfi/avfilter: track whether a filter has been initialized"

 This affects 6.0 as well.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/10226>
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