Queries the channels of a production studio.

Usage note

The CasterId parameter is required in the request.

QPS limit

A single user can perform a maximum of 15 queries per second (QPS). Throttling is triggered when the number of calls per second exceeds the QPS limit. The throttling may affect your business. Thus, we recommend that you observe the QPS limit on this operation. For more information about what a single user means and the QPS details, see QPS limit on an API operation in ApsaraVideo Live.


OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes DescribeCasterChannels

The operation that you want to perform. Set the value to DescribeCasterChannels.

CasterId String Yes a2b8e671-2fe5-4642-a2ec-bf93880e****

The ID of the production studio.

If you create a production studio through the CreateCaster interface, check the value of the CasterId parameter in the response.

If you create a production studio through the ApsaraVideo Live Console, log in to the console, then check the ID of the production studio through the following path:

Production Studios > Production Studio Management

Note The CasterId is reflected in the Name column on the Production Studio Management page.
RegionId String No cn-shanghai

The ID of the region.

Response parameters

Parameter Type Example Description
Channels Array of Channel

The channels that were queried.

ChannelId String RV01

The ID of the channel.

The layout references the channel IDs when the channels are enabled. You can specify up to one video resource for a channel. The value of this parameter must be in the RV[Number] format, such as RV01 and RV12.

ResourceId String 87642866-281E-4AEA-9582-B124879****

The ID of the video resource.

RtmpUrl String rtmp://demo.aliyundoc.com/caster/rtmperf?auth_key=****

The Real Time Messaging Protocol (RTMP) URL.

StreamUrl String http://demo.aliyundoc.com/caster/streamwsx.flv?auth_key=YYYYY

The URL of the output channel of the production studio.

RequestId String 83C52866-281E-4AEA-9582-B1245406349D

The ID of the request.

Total Integer 1

The total number of channels returned.


Sample requests

&<Common request parameters>

Sample success responses

XML format


JSON format

    "RequestId": "3be7ade8-d907-483c-b24a-0dad4595beaf",
    "Channels": [
            "ResourceId": "f66bfd3e-a4f3-4d37-ad72-5206cf15****",
            "ChannelId": "RV01",
            "StreamUrl": "http://demo.aliyundoc.com/caster/streamwsx.flv?auth_key=****",
            "RtmpUrl": "rtmp://demo.aliyundoc.com/caster/rtmperf?auth_key=****"

Error codes

For a list of error codes, visit the API Error Center.