[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):

 I took Ticket_11055.m2ts and made a video consisting of one frame: I. It
 is noteworthy that the frame is listed by all 3 methods. That is not true
 of that frame when there is 99 frames.

 DTS = "N/A" (marked below) is also noteworthy.

 Would you like me to try with 4 frames: I B B P? Then 6 frames: I B B P B
 P? Then 8 frames: I B B P B P B P? Et cetera?
 .

 A video consisting of one frame:
 {{{
 framecrc
 0,  504126135,  504137396,     3753,   640646, 0x9e6e8012

 showinfo
 n:   0 pts:504137396 pts_time:5601.526622 duration:   3753
 duration_time:0.0417  fmt:yuv420p cl:left sar:1/1 s:1920x1080 i:P iskey:1
 type:I checksum:58F7CCBB plane_checksum:[05982AD8 A216635F 3F973E84]
 mean:[19 129 129] stdev:[8.9 2.7 1.3]

 show_frames
 frames.frame.0.key_frame=1
 frames.frame.0.pts=504137396
 frames.frame.0.pkt_dts="N/A"    <<== ?
 frames.frame.0.best_effort_timestamp=504137396
 frames.frame.0.pict_type="I"
 frames.frame.0.interlaced_frame=0
 frames.frame.0.top_field_first=0
 frames.frame.0.repeat_pict=0
 }}}
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Ticket URL: <https://trac.ffmpeg.org/ticket/11055#comment:193>
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