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By default, the Decode key frames parameter is enabled. In this case only key frames are decoded. To disable the parameter, select the No value in the corresponding field.

This parameter reduces the load on the Server, but at the same time the detection quality decreases. We recommend enabling this parameter for "blind" (without video image display) Servers on which you want to perform detection.

For the MJPEG codec decoding isn’t relevant, as each frame is considered as a key frame.

ParameterValueDescription
Object features
Record mask to archiveYesBy default, the recording of the mask to the archive is disabled. To record the sensitivity scale of the detection tool to the archive (see Displaying information from a detection tool (mask)), select the Yes value
No
Video streamMain streamIf the camera supports multistreaming, select the stream for which detection is needed
Other
EnableYesBy default, the detection tool is enabled. To disable, select the No value
No
NameCrowd Estimation VAEnter the detection tool name or leave the default nameDecode key framesYes
Note
titleAttention!

The Number of frames processed per second and Decode key frames parameters are interrelated.

If a local Client isn’t connected to the Server, the following rules work for remote Clients:

  • If the key frame rate is less than the value specified in the Number of frames processed per second field, the detection tool will work by key frames.
  • If the key frame rate is greater than the value specified in the Number of frames processed per second field, the detection will be performed according to the set period.

If a local Client is connected to the Server, the detection tool will always work according to the set period. After disconnecting the local Client, the above rules will be relevant again.

NoDecoder modeAuto

Select a processing resource for decoding video. When you select a GPU, a stand-alone graphics card takes priority (when decoding with NVIDIA NVDEC chips). If there is no appropriate GPU, the decoding will use the Intel Quick Sync Video technology. Otherwise, CPU resources will be used for decoding

CPUGPUHuaweiNPUMode



CPU

Select the processor for the operation—CPU or NVIDIA GPU (see General information on configuring detection).

Note
titleAttention!
  • If you specify other processing resource than the CPU, this device will carry the most of computing load. However, the CPU will also be used to run the detection tool.
Nvidia GPU 0Nvidia GPU 1Nvidia GPU 2Nvidia GPU 3Number of alarm objects1

Specify the number of objects at which an event will occur. The value must be in the range [0; 10000]

Number of frames processed per second0.1

Specify the number of frames for the detection tool to process per second. The value must be in the range [0.016; 100]

Trigger upon count

Greater than or equal to threshold value

Select when you want to generate an event. The Crowd Estimation VA will generate events from the threshold value set in the Number of alarm objects field

Less than or equal to threshold valueTypeCrowd Estimation VAName of the detection tool type (non-editable field)

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