[FFmpeg-trac] #9681(avfilter:closed): drawbox enhancement

[FFmpeg]

#9681: drawbox enhancement
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             Reporter:  Jozef Chutka  |                    Owner:  (none)
                 Type:  enhancement   |                   Status:  closed
             Priority:  normal        |                Component:  avfilter
              Version:  unspecified   |               Resolution:  fixed
             Keywords:  drawbox       |               Blocked By:
             Blocking:                |  Reproduced by developer:  0
Analyzed by developer:  0             |
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Comment (by Jozef Chutka):

 This is great, thanks for an express fix.

 Potentially related, I am openning
 https://trac.ffmpeg.org/ticket/9686#ticket

 I would also like to understand the syntax from Elon's demo, completely
 alien to me `-vf "lavfi=[...]"` ? Whats the benefit of having filter graph
 wrapped inside lavfi=[...]?
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Ticket URL: <https://trac.ffmpeg.org/ticket/9681#comment:3>
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