[FFmpeg-trac] #2432(FFmpeg:new): generate/draw timecode from image number

[FFmpeg]

#2432: generate/draw timecode from image number
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             Reporter:  uzer_name    |                     Type:
               Status:  new          |  enhancement
            Component:  FFmpeg       |                 Priority:  wish
             Keywords:  timecode,    |                  Version:
  frame_num                          |  unspecified
             Blocking:               |               Blocked By:
Analyzed by developer:  0            |  Reproduced by developer:  0
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 It is often need to burn timecode and other data to proxy/dailies (mainly
 h264 mov), converted from DPX/EXR/whatever sequence, numbered by
 timecode->framenumber.

 But timecode currently could be added manually only via
 "timecode="xx:xx:xx:xx"
 It could be good when will exists some option like "timecode="sf", so
 timecode could be generated from image sequence startnumber. It could help
 alot if batch converting alot of sequences with adding TC/framenum
 overlays.

 Or/Also from embedded TC in DPX.
 Also could be good if it will be added formatting string for "frame_num"
 variable (like %05d or so).
 Also could be good to have absolute framenumber variable from image
 sequence, and sequence/image name variable.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2432>
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