[xine-user] normal play is smooth but playlist jumps between VOBs

[Robin O'L. <xi...@ro...>]

I am pleased to say that playback with xine is normally perfectly
smooth for me (on an Athlon 2000XP and Shuttle SN41G2B), whether from
a DVD directly or from a hard-disk (DVD copied with `dvdbackup -M').
But if I make a text-file playlist of VOB files I want to play, instead
of using the DVD's menu navigation method, there are a few frames of
audio and video missing in the playback at each transition between files.
I am fairly sure the missing bit is from the end of the previous scene.
e.g. ``Lord of the Rings - Fellowship of the Ring - Extended Edition''
with the following playlist:

file:///home/dvd/dvdlib/LOTR_SEE_D1/VIDEO_TS/VTS_01_2.VOB
file:///home/dvd/dvdlib/LOTR_SEE_D1/VIDEO_TS/VTS_01_3.VOB

where the transition comes right in the middle of a word.
Normal playpack of the same scene is perfectly seamless.

Having played these files many times now, I think the problem may not
be anything to do with playlists directly; if I tell xine just to play
a single VOB, I think perhaps it loses the last few frames; the audio
definitely cuts off too soon.

I am using the xine packages from Debian-unstable (xine-ui 0.9.22-1 and
libxine1 1-rc1-1).  Audio is alsa 0.9.6-5 using the snd-intel8x0 module
to drive the nvidia sound card in digital pass-through mode.  Video is
xfree86 4.2.1-12.1 using xv and behaves the same with either the free
nv driver or the nvidia binary driver.

I have tried all the various speed-up suggestions in the FAQ (although
playback was already smooth to begin with) and I have tried increasing and
decreasing the number of video buffers (video.num_buffers) in the config
file but that seemed to make little difference either way.  My suspicion
is that there is some premature buffer-flushing going on somewhere.
I have not yet attempted to understand how the code works to be any help
in tracking this down, but would be quite willing to do so if someone
can point me in the right direction.

Robin.