ZoneMinder Forums

Posted: **Sun Dec 24, 2006 11:21 am**

Hello,

I have installed the ZoneMinder 1.22.23 Mandriva package. I use a Creative webcam that works fine with the spca5xx driver (xawtv, image grabbing, zoneminder).

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$ /usr/lib/zm/bin/zmu -d /dev/video0 -q -v -U admin -P admin
Video Capabilities
  Name: Creative Nx Pro
  Type: 1
    Can capture
  Video Channels: 1
  Audio Channels: 0
  Maximum Width: 640
  Maximum Height: 480
  Minimum Width: 176
  Minimum Height: 144
Window Attributes
  X Offset: 0
  Y Offset: 0
  Width: 176
  Height: 144
Picture Attributes
  Palette: 4 - 24bit RGB
  Colour Depth: 24
  Brightness: 32768
  Hue: 0
  Colour :0
  Contrast: 32768
  Whiteness: 0
Channel 0 Attributes
  Name: ZC301-2
  Channel: 0
  Flags: 0
  Type: 2 - Camera
  Format: 0 - PAL

Monitor configuration: Width 176 Height 144
ZM works fine.

But when I try another resolution (640x480 320x240 352x288) there is no image and the following errors appears in /var/log/messages:

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Dec 24 11:10:59 localhost zmc_dvideo0[3300]: ERR [Sync failure for frame 3 buffer 0(1): Interrupted system call]
Dec 24 11:10:59 localhost zmdc[3271]: ERR ['zmc -d /dev/video0' exited abnormally, exit status 255]
Dec 24 11:10:59 localhost zmdc[3271]: INF ['zmc -d /dev/video0' starting at 06/12/24 11:10:59, pid = 3548]
Dec 24 11:10:59 localhost zmdc[3548]: INF ['zmc -d /dev/video0' started at 06/12/24 11:10:59]
Dec 24 11:10:59 localhost zmc_dvideo0[3548]: INF [Debug Level = 0, Debug Log = <none>]
Dec 24 11:11:00 localhost zmdc[3271]: WAR [Can't find process with command of 'zma -m 1']
Dec 24 11:11:01 localhost zmc_dvideo0[3548]: ERR [Can't shmget, probably not enough shared memory space free: Invalid argument]

You probably think "please read the FAQ" and I did it

shmall and shmmax kernel values were low. I tried:

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echo 134217728 >/proc/sys/kernel/shmall && echo 134217728 >/proc/sys/kernel/shmmax

and (later because it still didn't work) in /etc/sysctl.conf followed by a reboot:

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kernel.shmall = 134217728
kernel.shmmax = 134217728

but errors are still there and ZM fails with resolutions other than 176x144.

Do you have an ideas to solve this problem ? What could I try ? It is a test machine dedicated to ZM with a freshly installed Mandriva 2006 (kernel 2.6.12-27mdk), I can do anything on it.
Thanks in advance for your help !

Posted: **Sun Dec 24, 2006 12:26 pm**

Well, I enabled ZM_EXTRA_DEBUG and ZM_EXTRA_DEBUG_LEVEL 2 to read the debug log and now it works ! I disabled debug and it still works.
Sorry for this post, but please do not delete it yet, I will monitor shared memory use (don't know yet how) with this USB webcam, a PCI TV stream and an standalone IP CAM.

Posted: **Sun Dec 24, 2006 3:43 pm**

You need to fully restart ZM sometimes if you increase image sizes. It may be that you did then when playing with the debug and that was enough.

ZoneMinder Forums

No images and errors with resolutions other than 176x144

No images and errors with resolutions other than 176x144