[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
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             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 pdr0):

 Replying to [comment:194 Balling]:
 > >just know ffmpeg/ffprobe has long standing issues with IDR
 identification
 >
 > Recovery frames are tagged as keyframes because THEY are keyframes.
 >


 But "keyframe" (as identified by ffmpeg) are not necessarily IDR -
 nal_type_unit = 5 . And "I" frames (as identifed by ffmpeg) are not
 necessarily IDR.

 Some people misinterpret that when ffmpeg identifies a "keyframe" and
 think that is a valid cut point . But when you cut/append on non IDR
 boundaries, problems happen
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/11055#comment:197>
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