streamed video appears delayed by hours!

Forum for questions and support relating to the 1.25.x releases only.
Post Reply
anagram
Posts: 2
Joined: Tue May 05, 2015 7:05 pm

streamed video appears delayed by hours!

Post by anagram » Tue May 05, 2015 7:45 pm

I've been running Zoneminder 1.25.0 (and previous versions) for several years, and last year installed a Camsecure 8-channel pcie card (5008) which uses the Philips SAA7130HL chipset.

It has been working fine, but increasingly I'm getting a very weird error: about once a week the system goes into a state that superficially looks fine, but no alarm triggers are generated and on closer inspection the images streaming from the server are from hours in the past! It's not a frozen image -- you can see normal motion -- but it's at a reduced frame rate. The timestamps are for the current time though, indicating the the images are getting buffered somewhere before the timestamps are added.

I am using 6 of the 8 channels at 288x384, with a frame rate of 5 fps, and very litle cpu load. Looking at the logs, what seems to happen is the frame rate drops to 4.98 then to 2.19 and then to 2 fps over about 20 minutes and then sticks on 2 fps. If I restart Zoneminder then the video sources go black (though still with current timestamps). I have to reboot the whole machine to get things back to normal again.

My guess is this is a problem with the card, but zoneminder seems to be happily buffering data to introduce a very big delay. Does anyone know what is really going on here and whether there is anything I can do short of replacing the card? I'd rather not do that -- it was difficult to source!

Zoneminder v1.25.0
Debian Linux 7
Linux 3.13-0.bpo.1-amd64 on x86_64
8 GB memory

PacoLM
Posts: 971
Joined: Wed Dec 02, 2009 9:55 pm
Location: Spain

Re: streamed video appears delayed by hours!

Post by PacoLM » Thu May 07, 2015 5:44 pm

Temperature affecting the framegrabber card?

After more than 15 years, no longer using ZM as surveillance system.
Now in the dark side, using a commercial system...

anagram
Posts: 2
Joined: Tue May 05, 2015 7:05 pm

Re: streamed video appears delayed by hours!

Post by anagram » Thu May 07, 2015 6:06 pm

Yes, that could be the cause. I do though have heatsinks on all eight video chips and it's in my garage, which is pretty cool. The CPU is running at 30 celsius right now.

Post Reply

Who is online

Users browsing this forum: No registered users and 6 guests