#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>
FFmpeg <https://ffmpeg.org>
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