[FFmpeg-trac] #9257(undetermined:new): -ss fast seek can use bad (damaged) i-frame as references

FFmpeg trac at avcodec.org
Sun May 23 14:26:04 EEST 2021

#9257: -ss fast seek can use bad (damaged) i-frame as references
             Reporter:  parbruek     |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  wish         |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
Comment (by mkver):

 I guess that your video contains changing SPS/PPS without every keyframe
 containing these in-band. This is not uncommon for BD; commonly only
 pic_init_qp_minus26 is changed in which case the h264_redundant_pps-BSF
 could be used to fix this (by modifying the stream to no longer use
 changing PPS). Alternatively you could remux the BD (not the Matroska file
 which you already have) with MKVToolNix: It prepends the currently active
 SPS/PPS to every keyframe (if it detects changing parameter sets), so that
 this does not happen.
Ticket URL: <https://trac.ffmpeg.org/ticket/9257#comment:6>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker

More information about the FFmpeg-trac mailing list