[FFmpeg-trac] #7714(avformat:new): AV_NOPTS_VALUE as DTS after seeking MKV

[FFmpeg]

#7714: AV_NOPTS_VALUE as DTS after seeking MKV
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             Reporter:  chao      |                     Type:  defect
               Status:  new       |                 Priority:  normal
            Component:  avformat  |                  Version:  unspecified
             Keywords:  mkv       |               Blocked By:
             Blocking:            |  Reproduced by developer:  0
Analyzed by developer:  0         |
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 After seeking a MKV file, av_read_frame returns a packet with valid PTS,
 but AV_NOPTS_VALUE for DTS.
 This only happens if the MKV file has B frames.
 This is a test video:
 https://drive.google.com/file/d/1nAhheqpPIKqFH6QP_6w9FJFxsRG4zxtJ/view?usp=sharing

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Ticket URL: <https://trac.ffmpeg.org/ticket/7714>
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