Event firing, alarm frames present, but video missing movement

Discussions related to the 1.36.x series of ZoneMinder
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MeadowCourt
Posts: 7
Joined: Tue Mar 15, 2016 6:08 am

Event firing, alarm frames present, but video missing movement

Post by MeadowCourt »

Not sure what is going on here, but I've got a camera set up with the following buffer config:
2022-08-04 09_30_53-MeadowCourt - Monitor - 23 Springdale - Garage - Brave.png
2022-08-04 09_30_53-MeadowCourt - Monitor - 23 Springdale - Garage - Brave.png (13.41 KiB) Viewed 2405 times
It is correctly generating an event on movement with the shown alarm frames etc:
2022-08-04 09_32_37-MeadowCourt - Event 668617 - Brave.png
2022-08-04 09_32_37-MeadowCourt - Event 668617 - Brave.png (18.66 KiB) Viewed 2405 times
I can see the vehicle in the alarm frame:
2022-08-04 09_34_10-MeadowCourt - Frame - 668617 - 1 - Brave.png
2022-08-04 09_34_10-MeadowCourt - Frame - 668617 - 1 - Brave.png (410.26 KiB) Viewed 2405 times
The video shows the alarm as red in the timeline, but there is no vehicle recorded at all.

Any thoughts on what might be going here?
MeadowCourt
Posts: 7
Joined: Tue Mar 15, 2016 6:08 am

Re: Event firing, alarm frames present, but video missing movement

Post by MeadowCourt »

Could not attach a screenshot of video showing no vehicle in the original post, so followed up here
2022-08-04 09_41_41-ScreenToGif - Editor.png
2022-08-04 09_41_41-ScreenToGif - Editor.png (800.54 KiB) Viewed 2404 times
Morphyx
Posts: 2
Joined: Thu Nov 30, 2023 7:17 am

Re: Event firing, alarm frames present, but video missing movement

Post by Morphyx »

Hello,

I'm having the exact same problem as you had.
Did you ever manage to solve it?
Seems like the video starts a few seconds after the alarm is triggered.

These are my settings:
settings.png
settings.png (13.46 KiB) Viewed 2238 times
Also i'm using Camera passthrough


The alarm frame:
alarm frame.jpg
alarm frame.jpg (178.24 KiB) Viewed 2238 times
And the video missing the alarm:
video.jpg
video.jpg (153.09 KiB) Viewed 2238 times
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iconnor
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Location: Toronto
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Re: Event firing, alarm frames present, but video missing movement

Post by iconnor »

You both have a crazy high ImageBufferCount, likely because your systems didn't automatically adjust it during an upgrade to 1.36. That defaults to 3 now. You might realistically set it to 5 if video playback isn't smooth. Setting it so high means your system will be using a lot of ram unnecessarily.

Please look in your logs. I am suspecting that there are complaints about dropping packets from queue and not keeping up.
Morphyx
Posts: 2
Joined: Thu Nov 30, 2023 7:17 am

Re: Event firing, alarm frames present, but video missing movement

Post by Morphyx »

The logs shows the following details during the alarm:
(above alarm event code is: 1382)
alarm.jpg
alarm.jpg (422.55 KiB) Viewed 2170 times

If i change the ImageBufferCount down to 3, how long will the recordings be before the alarm goes off?
I want the recording to store a few seconds before the alarm goes off, in this case 20 pre event image count with a fps of 10 gives me 2 seconds.
The documentation tells me that pre event image count should not exceed half the ring buffer size=Image Buffer Size?
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