[FFmpeg-trac] #9648(avformat:new): IMF index seeking not supported

[FFmpeg]

#9648: IMF index seeking not supported
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             Reporter:  jimz_01   |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avformat  |                  Version:  git-master
             Keywords:            |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 Summary of the bug: the IMF ingest capability that was merged earlier this
 year does not appear to support index seeking. Seeking to a frame using
 "-s" and "-to" does produce the expected output video, but with large IMF
 assets, the operation takes a long time before the transcode begins
 (probably due to reading every frame)

 How to reproduce (example command, should repro with any source):
 {{{
 ffmpeg -assetmaps LOKI-F004-VF-ERROR-FIX-V30149148-FP-DPO-IMFD-UHD-
 HDR-24-ENG-239-ENG/ASSETMAP.xml,LOKI-F004-OV-ERROR-V30149148-FP-DPO-IMFD-
 UHD-HDR-24-ENG-239-ENG/ASSETMAP.xml \
     -i LOKI-F004-VF-ERROR-FIX-V30149148-FP-DPO-IMFD-UHD-
 HDR-24-ENG-239-ENG/CPL_LOKI-F004-VF-ERROR-FIX-V30149148-FP-DPO-IMFD-UHD-
 HDR-24-ENG-239-ENG.xml \
     -ss 585.0 -to 625.0 -pix_fmt yuv420p -vf scale=640:-2 -c:v libx264
 -preset medium -crf 20 /tmp/proxy-VF.mp4
 }}}

 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9648>
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