[FFmpeg-trac] #11170(ffmpeg:reopened): Support merging HEIC tile grids in ffmpeg

[FFmpeg]

#11170: Support merging HEIC tile grids in ffmpeg
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             Reporter:  markshw2222  |                    Owner:  (none)
                 Type:  enhancement  |                   Status:  reopened
             Priority:  wish         |                Component:  ffmpeg
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by dkode):

 One way is

 **Get grid info**


 {{{
 ffprobe -loglevel trace input.heic 2>&1 | grep  grid_row
 }}}

 **Extract grid images**

 {{{
  ffmpeg -i input.heic -map 0 output_%d.png
 }}}

 Then
 **Merge**

 {{{
 ffmpeg -i pngs/output_%d.png -vf "tile=8x6" final_output.png
 }}}
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Ticket URL: <https://trac.ffmpeg.org/ticket/11170#comment:3>
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