Tag: Time Lapse

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Knowledge Support Support exacqVision Server Categories Products

Time Lapse Recording Broken in exacqVision Server 22.12.3.0

Description 

Video is not being recorded for cameras scheduled to record on Time Lapse when running exacqVision Server version 22.12. 3.0

Product 

  • ExacqVision Server version 22.12.3.0

Steps to Reproduce 

  • Update from earlier version of exacqVision Server to 22.12.3.0
  • Search for time lapse recorded video any time after the update

Expected Results 

  • Video results are returned and can be played

Actual Results 

  • The following exacqVision Client Warning is returned “The Search did not return any metadata results. Please modify your search and try again.”

Solution

  • This issue was resolved in exacqVision Server version 22.12.5.0 if on an earlier version of 22.12 please update.

Categories
exacqVision Client exacqVision Server Products

Time Lapse Capture an Image Reverts Back to 1 Second in the Drop Down Menu

Description 

When selecting a Time Lapse under the cameras settings page in the client, Click Set, then hit the apply in the lower left. Once that happens the Box for the seconds/minutes/hours will revert back to 1 seconds.

Product 

Server/Client Time Lapse

Expected Results 

In the drop down box if you select 5 seconds and apply this it should show that in the time lapse box. The client reverts back to 1 second.

Actual Results 

Note: That the text entry does not represent what the value is currently set to. The values below the grid represent what it’s set to

Solution

Are we able to correct this behavior?

We potentially could, but only in cases where all of the selected squares have the same value and additionally it gets tricky because what if the value was set, then selected more squares. We would overwrite that value with what you were planning on applying.

Categories
Knowledge Support Support Categories Products exacqVision Hardware

H.264 Camera Configuration for Time-lapse Recording

H.264 compression uses a Group of Pictures (GOP) or Group of Video (GOV) to define how many P-frames are sent between each I-frame. (I-frames are complete pictures, whereas P-frames are partial frames reconstructed based on the last I-frame and all the P-frames in between.) Time-lapse recording stores I-frames. If time-lapse recording is configured at short intervals (about 30 seconds or less) on H.264/MPEG-4, time-lapse scheduling might not be able to record as fast as desired.

To ensure time-lapse records at the desired rate, the camera must be configured for a GOP/frame rate setting equal to or less than the time-lapse setting, in seconds. For example, suppose you have a camera with a GOP of 30 configured to record 5 frames per second (fps), which produces an I-frame once every 6 seconds (30 divided by 5). In this case, time-lapse recording cannot capture I-frames more than once every 6 seconds. Thus, the time-lapse interval must be greater than 6 seconds. If you want to record time-lapse video at shorter interval, you must reduce the GOP setting.

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H.264-Camera-Configuration-for-Time-lapse-Recording.pdf