Camera goes randomly to black on montage view

[ptosiani]

Hello i'm in Debian Lenny, i installed ZM following this guide: http://www.thinkdebian.org/archives/50

I have 3 Cameras,
1 Panasonic BLC-101
2 D-Link DCS-6620

I created the Panasonic Monitor using the presets and it works like a charm!

I followed this post to create the 2 D-Link monitors: http://www.zoneminder.com/forums/viewtopic.php?p=23222

The big problem i have is that the D-Link Cameras goes to black in a randomly behavior, they are working just fine in 10fps and suddenly they go to black for 3 or 7 seconds...

Any suggestions will be really appreciated!

Thanks!

[alf]

This worked for me from the faq


have several monitors configured but when I load the Montage view in FireFox why can I only see two? or, Why don't all my cameras display when I use the Montage view in FireFox?

By default FireFox only supports a small number of simultaneous connections. Using the montage view usually requires one persistent connection for each camera plus intermittent connections for other information such as statuses.

You will need to increase the number of allowed connections to use the montage view with more than a small number of cameras. Certain FireFox extensions such as FasterFox may also help to achieve the same result.

To resolve this situation, follow the instructions below:

Enter about:config in the address bar

scroll down to
browser.cache.check_doc_frequency 3
change the 3 to a 1

browser.cache.disk.enable True -> False
network.http.max-connections-per-server -> put a value of 100
network.http.max-persistent-connections-per-proxy -> 100 again
network.http.max-persistent-connections-per-server -> 100 again

[ptosiani]

Thank you ALF, but the problem is not from FireFox, i found this in /etc/log/syslog:

Aug 13 14:53:40 monitoreo zmc_m12[3842]: INF [Starting Capture]
Aug 13 14:53:56 monitoreo zmc_m12[3842]: ERR [Invalid JPEG file structure: two SOI markers]
Aug 13 14:53:56 monitoreo zmc_m12[3842]: ERR [Unable to decode jpeg]
Aug 13 14:53:56 monitoreo zmc_m12[3842]: ERR [Failed to capture image from monitor 12 (0/1)]
Aug 13 14:53:56 monitoreo zmdc[3802]: ERR ['zmc -m 12' exited abnormally, exit status 255]
Aug 13 14:53:56 monitoreo zms[3839]: WAR [Unable to store frame as shared memory invalid]
Aug 13 14:53:59 monitoreo zms[3839]: WAR [Rewound over write index, resuming live play]
Aug 13 14:54:09 monitoreo zms[3839]: ERR [Terminating, last frame sent time 10.004487 secs more than maximum of 10.000000]
Aug 13 14:54:16 monitoreo zmdc[3802]: INF [Starting pending process, zmc -m 12]
Aug 13 14:54:16 monitoreo zmdc[3802]: INF ['zmc -m 12' starting at 09/08/13 14:54:16, pid = 3850]
Aug 13 14:54:16 monitoreo zmdc[3850]: INF ['zmc -m 12' started at 09/08/13 14:54:16]
Aug 13 14:54:16 monitoreo zmc_m12[3850]: INF [Debug Level = 0, Debug Log = <none>]




I think that it's a shared memory problem... any other guess?

[alf]

Thank you ALF, but the problem is not from FireFox, i found this in /etc/log/syslog:

Aug 13 14:53:40 monitoreo zmc_m12[3842]: INF [Starting Capture]
Aug 13 14:53:56 monitoreo zmc_m12[3842]: ERR [Invalid JPEG file structure: two SOI markers]
Aug 13 14:53:56 monitoreo zmc_m12[3842]: ERR [Unable to decode jpeg]
Aug 13 14:53:56 monitoreo zmc_m12[3842]: ERR [Failed to capture image from monitor 12 (0/1)]
Aug 13 14:53:56 monitoreo zmdc[3802]: ERR ['zmc -m 12' exited abnormally, exit status 255]
Aug 13 14:53:56 monitoreo zms[3839]: WAR [Unable to store frame as shared memory invalid]
Aug 13 14:53:59 monitoreo zms[3839]: WAR [Rewound over write index, resuming live play]
Aug 13 14:54:09 monitoreo zms[3839]: ERR [Terminating, last frame sent time 10.004487 secs more than maximum of 10.000000]
Aug 13 14:54:16 monitoreo zmdc[3802]: INF [Starting pending process, zmc -m 12]
Aug 13 14:54:16 monitoreo zmdc[3802]: INF ['zmc -m 12' starting at 09/08/13 14:54:16, pid = 3850]
Aug 13 14:54:16 monitoreo zmdc[3850]: INF ['zmc -m 12' started at 09/08/13 14:54:16]
Aug 13 14:54:16 monitoreo zmc_m12[3850]: INF [Debug Level = 0, Debug Log = <none>]




I think that it's a shared memory problem... any other guess?

That was the only one, maybe you set the record time too long? I'm figuring this out myself.

[ptosiani]

The cameras are all in monitor mode, I installed ZM 1 year ago and it workout really good for me, i don't understating what seems to be the problem right now, i changed the /etc/sysctrl.conf to allocate more memory, but the problem persists, if someone has other ideas i would appreciate that.