0.2.71 release & Mac OS X/Darwin 1.3

Eric Carlson carl0240 at tc.umn.edu
Sat Apr 14 03:29:02 CEST 2001

On Friday, April 13, 2001, at 09:49  AM, Samuel Hocevar wrote:
> On Fri, Apr 13, 2001, Eric Carlson wrote:
>> BTW, i'm disabling GTK above because my GTK install is a bit broken and
>> I have no use for it anyway.
>    AFAIK, the Gtk interface hasn't been tested under OS X, please let us
> know if you ever manage to get it working.

Will do...

>> module: browsing //lib
>    Ok, this should have been "./lib" instead of "//lib". My fault, it 
> should be
> fixed in CVS. Try the following patch:
> <snip>

Thanks much! Command line vlc works now, but vlc.app is really touchy 
with regards to the open file dialog. More specifically, when I click on 
a file to open, the app frequently quits, sometimes following the system 
spinning disk cursor. I'm guessing this is related to some code that 
identifies if a file is OK for the app to open or not, since it has died 
every time selecting the unencrypted vob file to open, dies if I 
accidentally click on (but not open) a tiff file, for example, and 
sometimes when i click on and try to open a supported MPEG1 file. And, 
of course, thanks to something (maybe the OS?) remembering which file I 
was trying to open last in that application, any subsequent attempts 
fail immediately.

>> I've also messed around a bit with the unfinished DVDioctl.kext from
>> 0.2.70 with the dangerous ioctl stuff enabled. I've got kernel panic
>> output if anyone's interested.
>    I experienced the same behaviour. I couldn't really track the problem
> because I don't have physical access to an OS X box, so if you have any
> additional information on this topic it can be useful.

OK... here's the info I have, first the kernel panic text (hand copied 
from the screen of the crashed box. I double checked it all but it's 
possible I may have mis-typed something):

Unresolved kernel trap(cpu 0): 0x300  Data access DSISR=0x40000000 
DAR=0x0e893138 PC=0x12743c88, MSR=0x00009030
generating stack backtrace prior to panic:

backtrace: 0x12743c80 0x12743c80 0x127483b8 0x0024adb8 0x151a5b98 
0x000c2cc8 0x000bfb70 0x001a621c 0x0009d1e4 0x00099440 0x00000268 
kernel modules in backtrace: DVDioctl(1.0.0d1)@0x151a4000 
kernel module dependencies: 
Memory access exception (1,0,0)

What I did that caused the panic:
vlc run as: ./vlc dvd:/dev/dvd
Sorry I didn't run it with -vvvv :-(
The DVD in the drive was The Matrix (US release)
vlc build 0.2.70, DVDioctl kernel module from that release loaded, with 
source mods to enable dangerous io following instructions I found in the 
list archives (either vlc-devel or vlc, I forget) from March(?).

screen output:
intf: interface initialized
vout: video display initialized (720x576, 32/32 bpp)
vout: YUV acceleration unavailable!
<crashed here>

I connected with gdb (the remote debugger) from another machine while 
that machine was still panic'd. Since I don't really have any experience 
with gdb, I dug around in the help file but this is all the info I could 
really get it to show (I believe this is a stack backtrace... it should 
match the kernel panic output above):
(gdb) bt
#0  0x12743c88 in ?? ()
#1  0x127483b8 in ?? ()
#2  0x0024adb8 in ?? ()
#3  0x151a5b98 in ?? ()
#4  0x000c2cc8 in ?? ()
#5  0x000bfb70 in ?? ()
#6  0x001a621c in ?? ()
#7  0x0009d1e4 in ?? ()
#8  0x00099440 in ?? ()
#9  0x00000268 in ?? ()
warning: ppc_frame_chain_valid: stack pointer from 0x1231ffc0 to 
0x2086450 grows upward; assuming invalid

Hardware info: PowerMac G4/500 dual (gigabit), stock DVD-RAM drive on 
internal ATA bus. OS X 4K78 (xnu-123.5, according to uname -a).

I'll test any changes anyone makes to the DVDioctl.kext stuff... I've 
got 2 machines here with DVD drives and OS X installed (A Powerbook and 
the above G4) and another box with no dvd drive but OS X installed as 

>    By the way, when reading unencrypted DVDs, are you reading the
> mounted VOB files, or are you reading directly from /dev/dvd using the
> DVDioctl KEXT ?

Neither... I've been testing with an unencrypted VOB file obtained using 
a MacOS 9 app called DVDExtractor that reads a DVD, decrypts a vob file, 
and saves it to disk (necessary since I don't own any unencrypted DVDs). 
I've been getting around 18-22 fps playing that VOB file off my hard 
drive using the command line vlc program.

Hope that helps.


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