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Video Task Callback Backup to COS

Last updated: 2021-03-19 15:15:23


    This document describes how to use SCF to back up task callbacks generated by MPS to COS. SCF is mainly used to process callback information, MPS is mainly used for video processing tasks, and COS mainly provides persistent storage capabilities.


    Creating function

    1. Log in to the SCF console and select Function Service on the left sidebar.
    2. At the top of the Function Service page, select the Beijing region and click Create to enter the function creating page and configure the function.
      • Creation method: select Template.
      • Fuzzy search: enter "MPS_SCF_COS" and search.
        Click Learn More in the template to view relevant information in the Template Details pop-up window, which can be downloaded.
    3. Click Next. The function name is automatically generated by default and can be modified as needed.

    Configuring MPS trigger

    1. In the Trigger Configurations section, select Custom and enter relevant information according to the displayed parameters.
      • Triggered Version: select Default Traffic.
        • Trigger Method: select MPS Trigger.
        • Event Type: select Workflow Task.


          • When creating an MPS trigger for the first time, you need to click SCF_QcsRole and MPS_QcsRole to authorize the relevant service role.
          • Event type: an MPS trigger pushes events in the account-level event type. Currently, two event types are supported: workflow task (WorkflowTask) and video editing task (EditMediaTask).
          • Event processing: an MPS trigger uses events generated at the service level as the event source, regardless of attributes such as region and resources. Only one single function can be bound to each event type for each account. If you need multiple functions to handle a task, please see SDK for Node.js.
    2. Click Complete.

    Testing function

    1. Log in to the MPS console and execute a video processing workflow.
    2. On the Function Service page in the SCF console, click the name of the function created in the Creating function step above to enter the function details page.
    3. Select the Log Query tab on the function details page to view the printed log information.
    4. Log in to the COS console to view the data dumping and processing result.


      You can write specific data processing methods as needed.

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