'zmc -d 1' crashed

[thus0]

Hi,

I cannot capture an image in the monitor, with a USB Philips Webcam.

zmdc.log says that zmc crash (just after trying to capture a picture)
'zmc -d 0' started at 03/08/25 21:54:07
'zmc -d 0' crashed at 03/08/25 21:54:07, exit status 255

In /var/log/messages, I don't see any ERR messages, but in zmwatch.log, there's a permission pb
Can't read from shared memory: Permission denied

I try the modification described in http://www.zoneminder.com/forum_general ... rd_uid=156
but I still have this permission denied.

Thanks in advance.

Thus

[thus0]

I ran the command as root "zmc --device 1" with ZM_DBG_PRINT=1

I got this DEBUG OUTPUT... can this help ?

[...]
zmc-d1[5448].INF-zm_local_camera.cpp/203 [Cn:64512]
zmc-d1[5448].INF-zm_monitor.cpp/83 [monitor mode=1]
zmc-d1[5448].INF-zm_monitor.cpp/86 [shm.size=5760448]
zmc-d1[5448].INF-zm_zone.cpp/47 [Initialised zone 0/All - 1 - 160x120 - Rgb:ff0000, AT:15, MnAP:50, MxAP:75000, FB:3x3, MnFP:50, MxFP:50000, MnBS:10, MxBS:0, MnB:0, MxB:0]
zmc-d1[5448].INF-zm_monitor.cpp/143 [Monitor PhilipsUSB has function 2]
zmc-d1[5448].INF-zm_monitor.cpp/144 [Monitor PhilipsUSB LBF = '%%s - %y/%m/%d %H:%M:%S', LBX = 0, LBY = 0]
zmc-d1[5448].INF-zm_monitor.cpp/145 [Monitor PhilipsUSB IBC = 100, WUC = 25, pEC = 10, PEC = 10, FRI = 1000, RBP = 10]
zmc-d1[5448].INF-zm_zone.cpp/412 [Got 1 zones for monitor PhilipsUSB]
zmc-d1[5448].INF-zm_zone.cpp/47 [Initialised zone 1/All - 1 - 160x120 - Rgb:ff0000, AT:25, MnAP:576, MxAP:14400, FB:3x3, MnFP:576, MxFP:14400, MnBS:384, MxBS:0, MnB:1, MxB:0]
zmc-d1[5448].INF-zm_monitor.cpp/646 [Loaded monitor 1(PhilipsUSB), 1 zones]
zmc-d1[5448].INF-zmc.cpp/155 [Starting Capture]
zsh: segmentation fault zmc --device 1

Thus

[enricopallatzo]

I'm in the same situation. REdHat 9, with two Logitech quickcam pro 4000's.
'zmu -d 0 -q -v' detects all, but 'zmc --device 0' segfaults.

zmwatch.log contains a bunch of:
Can't get shared memory id: No such file or directory
and:
Watchdog starting at 03/08/27 19:58:14
Watchdog pausing for 30 seconds
and:
Can't get shared memory id:

Running 'strace zmc --device 0' gives the following at the end:
send(3, "<142>Aug 28 19:16:51 zmc-d0[3608"..., 57, 0) = 57
rt_sigaction(SIGPIPE, {SIG_IGN}, NULL, 8) = 0
rt_sigaction(SIGTERM, {0x8049e78, [], SA_RESTORER, 0x420276f8}, {SIG_DFL}, 8) = 0
ioctl(5, VIDIOCMCAPTURE, 0xa4df170) = 0
rt_sigprocmask(SIG_BLOCK, [USR1 USR2], NULL, 8) = 0
gettimeofday({1062119811, 40901}, {360, 0}) = 0
ioctl(5, VIDIOCMCAPTURE, 0xa4df180) = 0
ioctl(5, VIDIOCSYNC, 0x805eab8) = 0
time(NULL) = 1062119811
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV +++

So, it's clearly a directory permissions thing, but which/where? My money's on the shared memory (which I know nothing about, but will look to see if it tries to create a file and fails) I'll keep investigating, but if anyone has seen this before, your help would be massively appreciated!

Thanks,
Erik.

[thus0]

ZoneMinder works now for me (Gentoo)


1°) First, I checked if the shared memory was created by apache
$ ipcs -m | grep apache
0x7a6d2001 44007425 apache 777 2880248 2

2°) I had to increase kernel.shmmax
#sysctl -w kernel.shmmax="0x3000000"

3°) I decreased "Image Buffer Size (frames)" from 100 to 50

4°) Captured image was garbaged so I had to increase capture width and height
so that they are greater than the values supported by my webcam
You can find these values with the following command :
$ zmu -d 0 -q -v | grep Minimum
Minimum Width: 160
Minimum Height: 120

[enricopallatzo]

Well, I'm an airhead... I haven't got Zip.pm - and What's currently on CPAN (1.0.6) won't compile on my machine. So I'm going insane.

Any perl experts out there?

[zoneminder]

Hi Erik,

Do you still have the problem with Zip.pm (I assume you mean Archive::Zip by the way)? If so what do you get when you try and install it?

Cheers,

Phil,

[enricopallatzo]

Woo, forgot to write back that all was well - It turns out that the LANG variable, set in /etc/sysconfig/i18n (RedHat 9) was set to "en_CA.UTF-8" or some such. setting this to "C" was all it needed, and now I'm off to the races! CPAN worked like a charm after that.

I'm loving ZoneMinder - So does everyone else here. I'm using it to monitor a computer lab with great results - and my boss has asked me to present this to Campus Security... Not bad, eh?

Thanks for everything Philip,
Erik.