Comment 3 for bug 482107

I think I am experiencing the same issue. I have imported dv video (imported from dv camera using kino). The exported video does not line up with the sound track that I was aligning the clips to. It is fine when played back during edit mode, but after export, it seems the clips are starting early.

This is the output when run from a terminal:-

on_tlbPrevious_clicked called with self.tlbPrevious
on_tlbPlay_clicked called with self.tlbPlay
on_tlbPlay_clicked called with self.tlbPlay
on_tlbPrevious_clicked called with self.tlbPrevious
on_mnuMakeMovie1_activate called with self.mnuMakeMovie
on_tlbMakeMovie_clicked called with self.mnuMakeMovie
on_cboProjectType_changed
on_cboExportTo_changed
on_cboProjectType_changed
on_btnExportVideo_clicked
AC EOB marker is absent pos=64
AC EOB marker is absent pos=72
AC EOB marker is absent pos=64
    Last message repeated 3 times
AC EOB marker is absent pos=65
AC EOB marker is absent pos=64
AC EOB marker is absent pos=102
AC EOB marker is absent pos=64
on_btnCancel_clicked
on_frmExportVideo_destroy

I think the message "AC EOB marker is absent" might have something to do with it. Looking around I found this issue in ffmpeg https://roundup.ffmpeg.org/roundup/ffmpeg/issue1060

This issue is about frames being dropped due to missing "AC EOB marker" message, and states that it was fixed in June 2009. Therefore I am not certain if the fix is included in Karmic or not.

It would be interesting to see if you are getting the same messages when exporting. I have tested exporting to DVD-PAL, DVD-NTSC and Youtube-NTSC-Square, all with the same results.