[FFmpeg-trac] #11055(avcodec:reopened): OGOP (Open GOP) in certain conditions may cause missing frames of decoding

FFmpeg trac at avcodec.org
Fri Jun 21 00:35:32 EEST 2024


#11055: OGOP (Open GOP) in certain conditions may cause missing frames of decoding
-------------------------------------+-------------------------------------
             Reporter:  markfilipak  |                    Owner:  (none)
                 Type:  defect       |                   Status:  reopened
             Priority:  normal       |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  everything   |               Blocked By:
  OGOP                               |
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by MasterQuestionable):

 ͏    Not specifically on your file: on OGOP (Open GOP) in general.
 ͏    (rationale explained well before; comment:17 notably)

 ͏    "non-monotonous DTS" messages are warning, I believe: mere indicating
 the peculiarity of the input timestamps.

 ͏    comment:72 explained why and how. ("framecrc" "-vf" etc.)


 ͏    Meanwhile, I wonder:
 ͏    Could the origin inputs ("00305.m2ts", "00306.m2ts") be decoded
 without similar problem?
 ͏    .
 ͏    Verifiable with alike:
 ͏    ffmpeg -v debug -hide_banner -nostdin -nostats -i "00305.m2ts" -map
 v:0 -c copy -f null -
 ͏    (shall report the packet count for comparison)
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11055#comment:141>
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