[FFmpeg-trac] #7946(ffmpeg:new): drawtext %{metadata:key} can only pull manually entered tags

[FFmpeg]

#7946: drawtext %{metadata:key} can only pull manually entered tags
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             Reporter:               |                    Owner:
  electron.rotoscope                 |
                 Type:  enhancement  |                   Status:  new
             Priority:  minor        |                Component:  ffmpeg
              Version:  unspecified  |               Resolution:
             Keywords:  drawtext     |               Blocked By:
  metadata                           |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by electron.rotoscope):

 I suppose it would have been clearer if the third command above was
 {{{
 ffmpeg -f concat -safe 0 -i catjustfile.txt -vf
 "drawtext=text='%{metadata\:size\:notfound}'" -vframes 1 -y "out1.png"
 }}}
 but it's the same result

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Ticket URL: <https://trac.ffmpeg.org/ticket/7946#comment:1>
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