[MPlayer-users] can't play second half of some commercial DVDs

[Steve Kleene]

Here is a problem I've had with some, but not all, commercial DVDs.  I'm
trying to play a commercial DVD with mplayer.  Mplayer and lsdvd both show 5
titles.  Title 01 (length 02:17:56.000) has 35 chapters.  This succeeds:

  mplayer dvd://1 -chapter 19

but this fails:

  mplayer dvd://1 -chapter 20

With mencoder, I also tried indexing into title 01 with -ss.  This worked
until the time got to about 1:08:49.  This is almost exactly halfway into the
title, which is also what happened in the past.  (Sure sounds like a clue.)
Greater start times gave failure.  Using "dvdnav" instead of "dvd" didn't
help.

I just compiled mplayer 1.0rc2-4.1.2 and ran the following:
  ./mplayer -msglevel all=6 dvd://1 -chapter 20

Here is the relevant output:
  DVD start cell: 20  pack: 0x19F2BB-0x1B7423
  DVD start=1700539 end=3143586
  STREAM: [null] dvd://1
  STREAM: Description: DVD stream
  STREAM: Author:
  STREAM: Comment:
  DVD Seek! lba=0x19F2BB  cell=20  packs: 0x19F2BB-0x1B7423
  stream_seek: WARNING! Can't seek to 0xCF95D800 !
  stream_seek: WARNING! Can't seek to 0xCF95D800 !
  MPEG Stream reached EOF
  ds_fill_buffer: EOF reached (stream: video)
  MPEG packet stats: p100: 0  p101: 0 p1B6: 0 p12x: 0 sli: 0 a: 0 b: 0 c: 0 idr: 0 sps: 0 pps: 0 PES: 0  
  Not MPEG System Stream format... (maybe Transport Stream?)
  stream_seek: WARNING! Can't seek to 0xCF95D800 !

I'd appreciate any suggestions on how to get around this problem and will be
happy to provide any other debugging output that might help.  I'm running
Debian Etch.