Stream Push and Interruption Event Notification

Last updated: 2021-09-14 12:03:55

    Stream push/interruption callback is used to call back the push status information, including whether the push is successful or interrupted. You need to configure the server address for receiving push/interruption callback messages in a callback template and bind the template with the push domain name. When push starts via the generated push URL, Tencent Cloud backend will call back the push results to the server you set.

    This document describes the parameters in callback message notifications sent by Tencent Cloud CSS after a stream push/interruption callback event is triggered.


    You need to understand how to configure callbacks and how to receive messages on Tencent Cloud CSS before reading this document. For more information, see How to Receive Event Notification.

    Stream Push/Interruption Event Parameters

    Event type parameters

    Event Type Parameter Value
    Live push event_type = 1
    Live stream interruption event_type = 0

    Common callback parameters

    t int64 Expiration time, which is the Unix timestamp when the event notification signature expires.
    • The default expiration time of a message notification from Tencent Cloud is 10 minutes. If the time specified by the `t` value in a message notification has elapsed, it can be determined that this notification is invalid, thereby preventing network replay attacks.
    • The format of `t` is a decimal Unix timestamp, i.e., the number of seconds that have elapsed since 00:00:00 (UTC/GMT time), January 1, 1970.
    sign string Event notification security signature sign = MD5(key + t).
    Note: Tencent Cloud concatenates the encryption key and `t`, calculates the `sign` value through MD5, and places it in the notification message. When your backend server receives the notification message, it can confirm whether the `sign` is correct based on the same algorithm and then determine whether the message is indeed from the Tencent Cloud backend.

    key is the callback key in Event Center > Live Stream Callback, which is mainly used for authentication. We recommend filling in this field to ensure data security.

    Callback message parameters

    Parameter Type Description
    appid int User APPID
    app string Push domain name
    appname string Push path
    stream_id string Live stream name
    channel_id string Same as the live stream name
    event_time int64 UNIX timestamp when the event message is generated
    sequence string Message serial number, which is used to identify a push event. A push event generates push and interruption messages with the same serial number.
    node string Upstream node IP
    user_ip string User push IP
    stream_param string User push URL parameters
    push_duration string Push duration of the interrupted stream in milliseconds
    errcode int Stream push/interruption error code
    errmsg string Stream push/interruption error message
    set_id int Whether the push is from inside the Chinese mainland. 1-6: yes; 7-200: no
    width int Video width. This value may be 0 if the video header information is missing in the callback of the beginning of live push.
    height int Video height. This value may be 0 if the video header information is missing in the callback of the beginning of live push.

    Stream push and interruption error codes

    For error codes and error messages of stream push/interruption, see Stream interruption error codes.

    Sample callback message

    "width": 0,
    "height": 0,