[FFmpeg-trac] #2067(avfilter:new): -vf subtitles=??? libass seeking problem

[FFmpeg]

#2067: -vf subtitles=??? libass seeking problem
-------------------------------------+------------------------------------
             Reporter:  nikov        |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:  avfilter
              Version:  unspecified  |               Resolution:
             Keywords:  subtitles    |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by ubitux):

 You need to do that in two steps currently. libavfilter has no visibility
 on your seek.

 {{{
 ffmpeg -ss 30 -i f.srt f2.srt
 ffmpeg ... -vf subtitles=f2.srt ...
 }}}

 Alternatively, we could add a seek parameter to the filter. The best
 solution is obviously to support proper subtitles filtering, but this is
 another long standing issue, not easy to deal with, and which require
 large changes.

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2067#comment:2>
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