All Products
Search
Document Center

ApsaraVideo Media Processing:UpdateMediaCover

Last Updated:Aug 28, 2026

Updates the thumbnail of a media file.

Operation description

This operation updates only the thumbnail of a media file. To update all media information, see UpdateMedia.

Limits on QPS

You can call this operation up to 100 times per second. If the number of calls per second exceeds the limit, throttling is triggered and your business may be affected. For more information, see QPS limits.

Try it now

Try this API in OpenAPI Explorer, no manual signing needed. Successful calls auto-generate SDK code matching your parameters. Download it with built-in credential security for local usage.

Test

RAM authorization

The table below describes the authorization required to call this API. You can define it in a Resource Access Management (RAM) policy. The table's columns are detailed below:

  • Action: The actions can be used in the Action element of RAM permission policy statements to grant permissions to perform the operation.

  • API: The API that you can call to perform the action.

  • Access level: The predefined level of access granted for each API. Valid values: create, list, get, update, and delete.

  • Resource type: The type of the resource that supports authorization to perform the action. It indicates if the action supports resource-level permission. The specified resource must be compatible with the action. Otherwise, the policy will be ineffective.

    • For APIs with resource-level permissions, required resource types are marked with an asterisk (*). Specify the corresponding Alibaba Cloud Resource Name (ARN) in the Resource element of the policy.

    • For APIs without resource-level permissions, it is shown as All Resources. Use an asterisk (*) in the Resource element of the policy.

  • Condition key: The condition keys defined by the service. The key allows for granular control, applying to either actions alone or actions associated with specific resources. In addition to service-specific condition keys, Alibaba Cloud provides a set of common condition keys applicable across all RAM-supported services.

  • Dependent action: The dependent actions required to run the action. To complete the action, the RAM user or the RAM role must have the permissions to perform all dependent actions.

Action

Access level

Resource type

Condition key

Dependent action

mts:UpdateMediaCover

update

*All Resource

*

None None

Request parameters

Parameter

Type

Required

Description

Example

MediaId

string

Yes

The ID of the media file whose thumbnail you want to update. You can obtain the media ID by calling the AddMedia operation, or in the ApsaraVideo Media Processing (MPS) console by choosing Media Management > Media List, clicking Manage for the target video, and viewing the ID on the Basics tab.

6cc3aa66d1cb4bb2adf14e726c0a****

CoverURL

string

No

The URL of the new thumbnail. The URL must comply with RFC 2396, be UTF-8 encoded, and not exceed 3,200 bytes in length.

Note

To obtain the thumbnail URL, find the image in the Object Storage Service (OSS) bucket, click it to view details, and copy the part before the question mark (?) from the URL. Only HTTP URLs are supported.

http://example-bucket-****.oss-cn-hangzhou.aliyuncs.com//example-****.mp4

Response elements

Element

Type

Description

Example

object

RequestId

string

The ID of the request.

0DC39B9E-13D4-40BA-AE76-CFF9BD64239D

Examples

Success response

JSON format

{
  "RequestId": "0DC39B9E-13D4-40BA-AE76-CFF9BD64239D"
}

Error codes

See Error Codes for a complete list.

Release notes

See Release Notes for a complete list.