[FFmpeg-trac] #8084(avformat:new): Seeking backwards with large mkv files broken

FFmpeg trac at avcodec.org
Fri Aug 16 23:21:50 EEST 2019

#8084: Seeking backwards with large mkv files broken
             Reporter:  Kanehekili   |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  important    |                Component:  avformat
              Version:  unspecified  |               Resolution:
             Keywords:  mkv          |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |

Comment (by Kanehekili):

 Update: This happens only in a Matroska Version 2 Container.
 ffmpeg -i input.mkv -codec copy output.mkv
 changes the format version to 4 - no seeking problems

 The test file has the size of 16 GB. I'll try to split a part of it. It
 had been generated by makemkv, in case that helps

Ticket URL: <https://trac.ffmpeg.org/ticket/8084#comment:2>
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