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

[FFmpeg]

#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            |
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Comment (by markfilipak):

 Replying to [comment:199 MasterQuestionable]:
 > ͏    So simply put... Everything that uses OGOP (Open GOP) is
 potentially broken.
 > ͏    Havoc for the buggy standards.

 I sampled 10 Blu-ray movies in addition to the Criterion, Ingmar Bergman
 box set. Here are the ten with their barcodes.

 Open GOP
 {{{
 A CLOCKWORK ORANGE [1971] 085391156741 [2007]
 ALL ABOUT EVE [1950] 024543948223 01 [2010]
 AMADEUS [2001] 883929036882 [2009]
 CAMELOT [1967] 883929219902 [2012]
 LE MANS [1971] 7332431036079 [2016]
 STAR TREK BEYOND [2016] 032429252333 [2016]
 SULLY [2016] 883929680887 [2016]
 }}}

 Closed GOP
 {{{
 BIG NIGHT [1996] 9344256022036 [2021]
 PREDESTINATION [2013] 043396439139 [2015]
 }}}


 No B-frames
 {{{
 SHERLOCK HOLMES [2009] 883929331840 [2012]
 }}}
 Hollywood sure is putting out a lot of broken open GOP products, eh?
 .

 > ͏    To M. markfilipak:
 > ͏    I believe you have no idea what makes B-frame.
 > ͏    So constantly again and again asserting the non-sense that DTS, PTS
 shall be regardless identical...

 B-frames on DVD & Blu-ray do not have DTSes that I've ever seen, but it is
 FFmpeg that lists them as identical, not me.

 You're really a piece of work.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11055#comment:200>
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