The VideoLAN Forums

Hello, I just installed VLC 0.8.2 on my Win2k dual Athlon system to play DVDs. It works splendidly on many movies, but some movies have occasional hiccups where the audio and video hesitate for a second or so. The problem is repeatable, always happening at the same spots in the movie. All these movies play smoothly in WinDVD and Media Player Classic. These are all commercial region 1 disks, no bootlegs.

Here's the messages from one hiccup in "Shrek" (right after the Dreamworks logo fades):

dvdnav debug: DVDNAV_NOP
dvdnav debug: DVDNAV_CELL_CHANGE
dvdnav debug: - cellN=2
dvdnav debug: - pgN=1
dvdnav debug: - cell_length=822000
dvdnav debug: - pg_length=28326000
dvdnav debug: - pgc_length=485973000
dvdnav debug: - cell_start=2055000
dvdnav debug: - pg_start=0
dvdnav debug: DVDNAV_SPU_CLUT_CHANGE
dvdnav debug: DVDNAV_SPU_STREAM_CHANGE
dvdnav debug: - physical_wide=128
dvdnav debug: - physical_letterbox=128
dvdnav debug: - physical_pan_scan=128
dvdnav debug: buttonUpdate not done b=1 t=1
dvdnav debug: DVDNAV_AUDIO_STREAM_CHANGE
dvdnav debug: - physical=0
dvdnav debug: buttonUpdate not done b=1 t=1
main warning: dts != current_pts (-329795)
main warning: computed PTS is out of range (69812), clearing out
main warning: PTS is out of range (70767), dropping buffer
main warning: output PTS is out of range (100666), clearing out
main debug: audio output is starving (199861), playing silence
main warning: output date isn't PTS date, requesting resampling (-40940)
main warning: buffer is 40940 in advance, triggering downsampling

Here's a hiccup in "Star Wars Phantom Menace":

dvdnav debug: DVDNAV_NOP
dvdnav debug: DVDNAV_CELL_CHANGE
dvdnav debug: - cellN=8
dvdnav debug: - pgN=3
dvdnav debug: - cell_length=31725000
dvdnav debug: - pg_length=34326000
dvdnav debug: - pgc_length=734778000
dvdnav debug: - cell_start=29250000
dvdnav debug: - pg_start=26649000
dvdnav debug: DVDNAV_SPU_CLUT_CHANGE
dvdnav debug: DVDNAV_SPU_STREAM_CHANGE
dvdnav debug: - physical_wide=128
dvdnav debug: - physical_letterbox=129
dvdnav debug: - physical_pan_scan=128
dvdnav debug: buttonUpdate not done b=1 t=1
dvdnav debug: DVDNAV_AUDIO_STREAM_CHANGE
dvdnav debug: - physical=0
dvdnav debug: buttonUpdate not done b=1 t=1
main warning: dts != current_pts (-325981)
main warning: computed PTS is out of range (12819), clearing out
main warning: timing screwed, stopping resampling
main warning: PTS is out of range (11278), dropping buffer
main warning: output PTS is out of range (31028), clearing out
main warning: input PTS is out of range (12819), trashing
main warning: audio drift is too big (-342662), clearing out
main warning: backward_pts != current_pts (16682)
main debug: audio output is starving (229610), playing silence

Similar hiccups in "The Incredibles".

When the problem occurs, it's always immediately after one of those message bursts that begins with DVDNAV_NOP. (What do they mean?) A small percentage of those message bursts have the hiccup problem.

Anyone else seen this problem? Suggestions?

I tried both my IDE and Firewire DVD drives - same problem. I tried VLC 0.7.2 - same problem. I tried increasing caching, but no effect. I tried recompressing "Shrek" onto a DVD-R by using DVD Shrink 3.2, and it hiccups at exactly the same locations as the original disk.

My graphics is nVidia 6800. Audio is Hercules Fortissimo II with Win2k default drivers.

What else can I try?

Thank you.

Hello,

I have the same problem when playing DVDs. I have tried using cache - in ms - but it does not solve the problem. Can anyone help us?

Thanks.

Hi guest,

Is you hardware and operating system similar to mine, or different?

This user seems to have the same problem:
viewtopic.php?t=9278

Anyone - where can I learn what those various debug messages mean?

Thanks.