Re: DVD playback problems
Andrew,
Thanks very much for replying to my email. I appreciate it.
I think what really matters is the permissions on /dev/cdrom or
/dev/hdc depending on how you're set up. check those. they should be
root:cdrom. Also, what mechanism are you using for mounting these
disks? You may have to monkey with its config to get the permissions
of the mounted disk the way you want.
Hmmm.
piers@hinata:/dev$ ls -l hdb
brw-rw---- 1 root disk 3, 64 2005-02-26 06:38 hdb
piers@hinata:/dev$
I assume this should be cdrom not disk correct?
Trying to remember how I set up the dvd drive to mount automatically
when a DVD disc is inserted - I seem to recall using a program called
"automount" and the following line are in /etc/auto.misc:
cd -fstype=iso9660,ro,nosuid,nodev :/dev/hdb
Following line found in /etc/auto.master:
/misc /etc/auto.misc --timeout=60
And that seems to be all that I could find.
Reading the man pages of automount doesn't show anything about groups.
I tried disabling automount, and mounting the CD myself as a normal
user, it could mount, and I could see what was in it, but I couldn't
play back the video as piers, but I could play it back as root. I
SSH'ed into Hinata and tried the following command as user piers:
--------------------------------------------------
piers@hinata:/misc/cd/VIDEO_TS$ mplayer dvd:// -dvd-device /misc/cd
MPlayer 1.0pre7try2-3.3.5 (C) 2000-2005 MPlayer Team
CPU: Advanced Micro Devices Athlon Thunderbird (Family: 6, Stepping: 2)
Detected cache-line size is 64 bytes
CPUflags: MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 0 SSE2: 0
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx
Failed to open /dev/rtc: Permission denied (it should be readable by the
user.)
Playing dvd://.
libdvdread: Attempting to use device /dev/hdb mounted on /misc/cd for
CSS authentication
libdvdread: Could not open device with libdvdcss.
libdvdread: Can't open /dev/hdb for reading
libdvdread: Device /dev/hdb inaccessible, CSS authentication not available.
Reading disc structure, please wait...
There are 6 titles on this DVD.
There are 6 chapters in this DVD title.
There are 1 angles in this DVD title.
MPlayer interrupted by signal 2 in module: open_stream
piers@hinata:/misc/cd/VIDEO_TS$
--------------------------------------------------
As root:
--------------------------------------------------
hinata:/misc/cd/VIDEO_TS# mplayer dvd://1 -dvd-device /misc/cd
MPlayer 1.0pre7try2-3.3.5 (C) 2000-2005 MPlayer Team
CPU: Advanced Micro Devices Athlon Thunderbird (Family: 6, Stepping: 2)
Detected cache-line size is 64 bytes
CPUflags: MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 0 SSE2: 0
Compiled for x86 CPU with extensions: MMX MMX2 3DNow 3DNowEx
Playing dvd://1.
libdvdread: Attempting to use device /dev/hdb mounted on /misc/cd for
CSS authentication
Reading disc structure, please wait...
There are 6 titles on this DVD.
There are 6 chapters in this DVD title.
There are 1 angles in this DVD title.
DVD successfully opened.
MPEG-PS file format detected.
VIDEO: MPEG2 720x576 (aspect 3) 25.000 fps 7500.0 kbps (937.5 kbyte/s)
==========================================================================
Opening audio decoder: [liba52] AC3 decoding with liba52
Using 3DNowEx optimized IMDCT transform
AC3: 2.0 (dolby) 48000 Hz 192.0 kbit/s
Using MMX optimized resampler
AUDIO: 48000 Hz, 2 ch, s16le, 192.0 kbit/12.50% (ratio: 24000->192000)
Selected audio codec: [a52] afm:liba52 (AC3-liba52)
==========================================================================
vo: couldn't open the X11 display ()!
vo: couldn't open the X11 display ()!
VO XOverlay need a subdriver
[gl] Using 4 as slice height (0 means image height).
vo: couldn't open the X11 display ()!
vo: couldn't open the X11 display ()!
vo: couldn't open the X11 display ()!
Can't open /dev/fb0: No such device or address
[fbdev2] Can't open /dev/fb0: No such device or address
==========================================================================
Opening video decoder: [mpegpes] MPEG 1/2 Video passthrough
VDec: vo config request - 720 x 576 (preferred csp: Mpeg PES)
VDec: using Mpeg PES as output csp (no 0)
Movie-Aspect is 1.78:1 - prescaling to correct movie aspect.
VO: [vesa] 720x576 => 1024x576 Mpeg PES
hinata:/misc/cd/VIDEO_TS#
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As I was SSH'ing in, the X11 display errors are obvious, but it shows
that the DVD would have been played back fine.
Interestingly, if I mounted it as user piers, the users and groups are
garbled:
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piers@hinata:/misc$ ls -l
total 2
dr-xr-xr-x 3 4294967295 4294967295 88 2002-06-20 11:05 cd
piers@hinata:/misc$
--------------------------------------------------
Thank you very much again for your help, much appreciated!
Regards - Piers
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