Help Center/ Video Intelligent Analysis Service/ API Reference/ Algorithm APIs/ Cloud Service APIs/ Creating a Crowd Density Monitoring (Cloud) Task

Updated on 2024-04-22 GMT+08:00

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Creating a Crowd Density Monitoring (Cloud) Task

Function

This API is used to create a crowd density monitoring (cloud) task.

URI

POST /v2/{project_id}/services/c-crowdcount-cloud/tasks

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Project ID. For details about how to obtain the project ID and name, see Obtaining the Project ID and Name.

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	User token. For details about how to obtain a user token, see Authentication.

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
name	Yes	String	Job name. It can contain up to 100 characters and can include uppercase and lowercase letters, digits, hyphens (-), and underscores (_).
description	No	String	Job description. It can contain up to 500 characters. Minimum: 0 Maximum: 500
schedule	No	TaskSchedule object	Task schedule. Only the weekly mode is supported.
input	Yes	TaskInput object	Input configuration of a job
output	Yes	TaskOutput object	Output configuration of a job. At least one output mode must be configured.
config	No	CrowdCountServiceConfig object	Job configuration parameters.
service_version	Yes	String	Service version. The value must match the regular expression ^[a-z0-9.]{3,32}$. Minimum: 3 Maximum: 32
is_saved_as_template	No	Boolean	Whether to save the job configuration as a template.
resource_order_id	No	String	Resource order ID, which corresponds to the associated algorithm. This parameter is only mandatory for commercial algorithms and must match the regular expression ^[a-z0-9-_]{4,36}$. Minimum: 4 Maximum: 36

**Table 4** TaskSchedule
Parameter	Mandatory	Type	Description
type	Yes	String	Type of a scheduled task. This parameter is mandatory for scheduled tasks. The options are weekly and monthly.
timezone	Yes	String	Time zone where a user is located. This parameter is mandatory for scheduled jobs. The value is accurate to the minute.
days_of_week	No	Array of integers	Days in a week when a task is executed. This parameter is mandatory only for weekly tasks. The values 1 to 7 indicate Monday to Sunday respectively. Minimum: 1 Maximum: 7 Array Length: 1 - 7
days_of_month	No	Array of integers	Days in a month when a task is executed. This parameter is mandatory only for monthly tasks. The values 1 to 31 indicate the first day to the 31st day of a month. Minimum: 1 Maximum: 31
periods	No	Array<Array<>>	Time segment configuration. Select at least one time segment for executing a weekly or monthly job.

**Table 5** TaskInput
Parameter	Mandatory	Type	Description
type	Yes	String	Task input type, which is mandatory when you create a task. The video_source type cannot be changed to other types. The following types are supported: obs (files stored in OBS, supported only by cloud tasks), url (specified file URL or stream request URL, supported only by cloud tasks), edgecamera (edge camera bound to IEF, supported only by edge tasks), restful (stream request URL obtained from a user-specified streaming server through a RESTful API, supported by both cloud and edge tasks), vcn (VCN device, supported only by edge tasks), and video_source (video sources managed in VIAS, supported by both cloud and edge tasks). You are advised to use the video_source type. Other types will be discontinued in the future. Options: video_source obs (not recommended and will be discontinued) url (not recommended and will be discontinued) edgecamera (not recommended and will be discontinued) restful (not recommended and will be discontinued) vcn (not recommended and will be discontinued)
data	Yes	Array of TaskInputData objects	Input details of a task, which is mandatory. The configuration varies according to the input type. Multiple inputs are allowed during creation, but only one input is allowed for update. If the input type is obs, you must configure bucket, path, and index. Example: bucket: aicam, path: 3rdpartylicenses.txt, index: 0 If the input type is url, you must configure url and index. Example: url: https://xxx-xxx.com, index: 0 If the input type is restful, you must configure certificate_check, rtsp_path_in_response, url, index, and headers. Example: certificate_check: true, url: https://hsaij-dasahbi.com, rtsp_path_in_response: data/url, index: 0, headers: { AAA: AAA } If the input type is vcn, you must configure device_id, stream_type, and index. Example: device_id: 21356478954612546874#gdhjkiushdgdksjhslmhscjsckjhdbnk, stream_type: 1, index: 0 If the input type is EdgeCamera, you must configure id and index. Example: id: 007cdafc-6000-47ce-b0e3-870b4a0db65e, index: 0. Array Length: 1 - 50
vcn	No	TaskInputVcn object	VCN server information. This parameter is mandatory only when the input type is vcn.

**Table 6** TaskInputData
Parameter	Mandatory	Type	Description
video_source_id	No	String	Video source ID. This parameter is mandatory when the input type is video_source.
stream_name	No	String	Name of a video stream.
bucket	No	String	OBS bucket name. This parameter is mandatory when the input type is obs. Maximum: 63
path	No	String	OBS path. This parameter is mandatory when the input type is obs. Maximum: 1023
url	No	String	File URL or RESTful request URL for obtaining a video stream. This parameter is mandatory when the input type is url or edgerestful. The value contains a maximum of 1000 characters. Maximum: 1000
headers	No	Object	Headers carried in the RESTful request for obtaining a video stream. This parameter is optional when the input type is edgerestful. The value is key-value pairs in JSON format. A maximum of 10 key-value pairs are allowed.
certificate_check	No	Boolean	Whether to verify the certificate of the HTTPS request. This parameter is mandatory when the input type is edgerestful. The value can be true or false.
rtsp_path_in_response	No	String	Video stream address in the response body for the RESTful request. This parameter is mandatory when the input type is edgerestful. The value contains a maximum of 1024 characters. Maximum: 1024
device_id	No	String	VCN ID. This parameter is mandatory when the input type is vcn.
stream_type	No	Integer	Stream type used for analysis. This parameter is optional when the input type is vcn. The value ranges from 1 to 3. The value 1 indicates primary stream, the value 2 indicates secondary stream 1, and the value 3 indicates secondary stream 2. Minimum: 1 Maximum: 3
id	No	String	ID of the edge device mounted to IEF. This parameter is mandatory when the input type is edgecamera. Maximum: 63

**Table 7** TaskInputVcn
Parameter	Mandatory	Type	Description
ip	Yes	String	IP address of the VCN server. This parameter is mandatory only when the input type is vcn.
port	Yes	Integer	Port number of the VCN server. This parameter is mandatory only when the input type is vcn. Minimum: 0 Maximum: 65535
username	Yes	String	Account name of a VCN server. This parameter is mandatory only when the input type is vcn. The value must match the regular expression ^.{1,100}$.
password	Yes	String	Password of a VCN server account. This parameter is mandatory only when the input type is vcn. The value must match the regular expression ^.{1,1000}$.

**Table 8** TaskOutput
Parameter	Mandatory	Type	Description
obs	No	TaskOutputObs object	Configuration information when the output type is obs.
dis	No	TaskOutputDis object	Configuration information when the output type is dis.
webhook	No	TaskOutputWebhook object	Configuration information when the output type is webhook.
event_center	No	Boolean	Whether to send alarms to the event center. This parameter is valid for cloud jobs. Default: false

**Table 9** TaskOutputObs
Parameter	Mandatory	Type	Description
bucket	Yes	String	OBS bucket name. This parameter is mandatory when the OBS output type is used. The verification rule is (pattern: " ^[a-z0-9](?!.[-.][-.].)([a-z0-9-.]{1,61})[a-z0-9]$ "). Maximum: 63
path	Yes	String	OBS path. This parameter is mandatory when the OBS output type is used. The verification rule is *^(?![/.\s])(?!.//.)([^:?"<>\|]{0,1023})(?<![.\s])$. Maximum: 1023**
data_category	No	Array of strings	List of job output types. This parameter is optional and is required only for some services. The output contains data in the dataCategory list. Array Length: 0 - 10

**Table 10** TaskOutputDis
Parameter	Mandatory	Type	Description
stream_name	Yes	String	DIS stream name. This parameter is mandatory when the dis type is used. Maximum: 64
data_category	No	Array of strings	List of job output types. This parameter is optional and is required only for some services. The output contains data in the dataCategory list. Array Length: 0 - 10

**Table 11** TaskOutputWebhook
Parameter	Mandatory	Type	Description
url	Yes	String	Result callback address. This parameter is mandatory when the output type is webhook. Maximum: 1000
headers	Yes	Object	Headers carried in result callback. This parameter is mandatory when the output type is webhook. The value is key-value pairs in JSON format. A maximum of 10 key-value pairs are allowed, and a minimum of 1 key-value pair is allowed.
data_category	No	Array of strings	List of job output types. This parameter is optional and is required only for some services. The output contains data in the dataCategory list. Array Length: 0 - 10

**Table 12** CrowdCountServiceConfig
Parameter	Mandatory	Type	Description
common	No	CrowdCountCommon object	Job runtime configuration items customized by the service publisher. The value must be in JSON format. For details about the configuration items, see the description of the corresponding algorithm service.

**Table 13** CrowdCountCommon
Parameter	Mandatory	Type	Description
alarm_threshold	No	String	People count alarm thresholds. Default value: 50. The value must be a positive integer. When the number of people in a video frame is greater than or equal to the threshold, the video image is output in JSON format for alarm. You can enter different alarm thresholds for each ROI. The alarm thresholds are separated by spaces. If the number of alarm thresholds within the list is greater than the actual number of ROIs, the first alarm thresholds matching the number of ROIs are used. If the number of alarm thresholds within the list is less than the actual number of ROIs, use the default value for the rest part. For example, if there are three ROIs and three threshold values (25 30 20) are entered, the image is sent as long as one ROI alarm is generated. When there are only two values (25 15) are entered, the threshold of the third ROI will be defaulted to 50. When there are more than three threshold values (such as 25 36 23 40) are entered, the first three values (25 36 23) are automatically selected.
sampling_time_interval	No	Integer	Interval at which video sampling is performed. The default value is 10s. The value range is [5, 3600], seconds. By default, a video image is sampled every 10 seconds, and N frames will be skipped between every two image samplings. N = sampling_time_interval x Frame rate (fps). For example, if the frame rate is 25 fps and the sampling interval is 1 second, 25 frames will be skipped between every two image samplings. Minimum: 5 Maximum: 3600 Default: 10
alert_mode	No	String	Alarming mode. Default value: single. There are two alarm modes: single: event alarming. An alarm is reported only when a new alarm event is generated and the number of people reaches the alarm threshold. periodic: periodic alarming. An alarm is reported each time a video sampling interval expires. Default: single
banner_detection_sw	No	Integer	Whether to enable protest banner detection. The value ranges from 0 to 1 and the default value is 0. When the function is enabled, the system detects banners in the ROI area of video images. Minimum: 0 Maximum: 1 Default: 0
banner_threshold	No	String	List of banner detection alarm thresholds. The default value is 1. The value must be a positive integer. For details about how to use this parameter, see alarm_threshold.
visualization_output_sw	No	Integer	Whether to send the edited video image with scenario information in it. The value ranges from 0 to 1 and the default value is 0. By default, when the number of people in each ROI exceeds the alarm threshold, only the structured information of the original image is sent. The detected people and banners can be displayed only after the visualization function is enabled. The visualized alarm information in images for different scenarios is as follows: Banners for protests are marked in red boxes. If a densely populated area is detected, the area is rendered in different colors. Each ROI is marked with a yellow polygon in the image. Minimum: 0 Maximum: 1 Default: 0
density_sw	No	Integer	Density estimation status. You can customize whether to use a density estimation model to evaluate the number of people. Use a density estimation model if the number of people is large and the alarm threshold is large. A density estimation model is used by default. The value ranges from 0 to 1 and the default value is 1. Minimum: 0 Maximum: 1 Default: 1
image_compression_ratio	No	Integer	Corresponds to the Image Compression Ratio parameter on the console. The value ranges from 20 to 100. The default value is 90, indicating that the image compression ratio is 90%. Minimum: 20 Maximum: 100 Default: 90
target_roi	No	String	Corresponds to the Target ROI parameter on the console. This parameter specifies the detection area. The value of this parameter is a JSON string. An escape character must be added in an API call. For details about the JSON format, see Setting target_roi. Example: {"polygons":[{"data":[[84,389],[1840,349],[1824,526],[78,526]]}]} If this parameter is not specified, the detection area is the entire video frame.

Response Parameters

Status code: 200

**Table 14** Response body parameters
Parameter	Type	Description
tasks	Array of TaskResponse objects	ID list of tasks created in VIAS

**Table 15** TaskResponse
Parameter	Type	Description
id	String	ID of a task created in VIAS

Status code: 400

**Table 16** Response body parameters
Parameter	Type	Description
error_code	String	Error code
error_msg	String	Error information
detail	String	Error details
params	Array of strings	Error parameters Array Length: 0 - 1
reason	String	Error cause
advice	String	Suggestion

Status code: 500

**Table 17** Response body parameters
Parameter	Type	Description
error_code	String	Error code
error_msg	String	Error information
detail	String	Error details
params	Array of strings	Error parameters Array Length: 0 - 1
reason	String	Error cause
advice	String	Suggestion

Example Requests

This request is used to create a crowd density monitoring (cloud) task, with the input type set to video_source and the output type set to dis.

POST /v2/{project_id}/services/c-crowdcount-cloud/tasks

{
  "name" : "crowdcount-task",
  "description" : "CrowdCountDetection task test",
  "input" : {
    "type" : "video_source",
    "data" : [ {
      "video_source_id" : "xxxxxxx-xxxxxxx-xxxxxxx-xxxxx-xxxxxx"
    } ]
  },
  "output" : {
    "dis" : {
      "stream_name" : "crowdcount"
    }
  },
  "service_version" : "3.0",
  "resource_order_id" : "840a5cf90d4a4bbaa71f251dfe8fe64e",
  "config" : {
    "common" : {
      "banner_detection_sw" : 1,
      "banner_threshold" : "2",
      "alarm_threshold" : "5",
      "sampling_time_interval" : 8,
      "density_sw" : 1,
      "visualization_output_sw" : 1,
      "image_compression_ratio" : 80,
      "target_roi" : "{\"polygons\":[{\"data\":[[100,100],[1800,100],[1800,1000],[100,1000]]}]}"
    }
  }
}

This request is used to create a crowd density monitoring (cloud) task, with the input type set to obs and the output type set to dis.

POST /v2/{project_id}/services/c-crowdcount-cloud/tasks

{
  "name" : "crowdcount-task",
  "description" : "CrowdCountDetection task test",
  "input" : {
    "type" : "obs",
    "data" : [ {
      "bucket" : "obs_test_video",
      "path" : "test.mp4",
      "index" : 0
    } ]
  },
  "output" : {
    "dis" : {
      "stream_name" : "crowdcount"
    }
  },
  "service_version" : "3.0",
  "resource_order_id" : "840a5cf90d4a4bbaa71f251dfe8fe64e",
  "config" : {
    "common" : {
      "banner_detection_sw" : 1,
      "banner_threshold" : "2",
      "alarm_threshold" : "5",
      "sampling_time_interval" : 8,
      "density_sw" : 1,
      "visualization_output_sw" : 1,
      "image_compression_ratio" : 80,
      "target_roi" : "{\"polygons\":[{\"data\":[[100,100],[1800,100],[1800,1000],[100,1000]]}]}"
    }
  }
}

This request is used to create a crowd density monitoring (cloud) task, with the input type set to url and the output type set to dis.

POST /v2/{project_id}/services/c-crowdcount-cloud/tasks

{
  "name" : "crowdcount-task",
  "description" : "CrowdCountDetection task test",
  "input" : {
    "type" : "url",
    "data" : [ {
      "url" : "https://obs_test/test.mp4",
      "index" : 0
    } ]
  },
  "output" : {
    "dis" : {
      "stream_name" : "crowdcount"
    }
  },
  "service_version" : "3.0",
  "resource_order_id" : "840a5cf90d4a4bbaa71f251dfe8fe64e",
  "config" : {
    "common" : {
      "banner_detection_sw" : 1,
      "banner_threshold" : "2",
      "alarm_threshold" : "5",
      "sampling_time_interval" : 8,
      "density_sw" : 1,
      "visualization_output_sw" : 1,
      "image_compression_ratio" : 80,
      "target_roi" : "{\"polygons\":[{\"data\":[[100,100],[1800,100],[1800,1000],[100,1000]]}]}"
    }
  }
}

Example Responses

Status code: 200

Operation successful

{
  "tasks" : [ {
    "id" : "20690c67d71549c39085a3b28c18f24f"
  } ]
}

Status Codes

Status Code	Description
200	Operation successful
400	Request error
500	Internal error

Error Codes

See Error Codes.

Parent topic: Cloud Service APIs

Previous topic: Creating an Abandoned Object Detection (Cloud) Task

Next topic: Creating a Work Gear and Helmet Detection (Cloud) Task

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