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CreateMixStream

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Creates a stream mixing task.

Operation description

Important

Cloud stream mixing is a paid feature. This feature is in public preview and is currently free of charge. Standard fees will apply after the public preview period. The end date of the public preview will be announced at a later date.

You can call this operation to create a stream mixing task. This operation supports both preset and custom layouts.

QPS limit

A single user can make up to 10 queries per second (QPS). Calls that exceed this limit are throttled. Throttling may affect your business operations. We recommend that you plan your calls accordingly.

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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

live:CreateMixStream

create

*Domain

acs:live:*:{#accountId}:domain/{#DomainName}

 None None

Request parameters

Parameter

Type

Required

Description

Example
RegionId

string

No

The region ID.

cn-shanghai
DomainName

string

Yes

The primary streaming domain.

Important

Currently, only domain names in the China (Shanghai) and China (Beijing) regions are supported.

example.com
LayoutId

string

Yes

The layout ID. Valid values:

  • MixStreamLayout-1-1

  • MixStreamLayout-2-1

  • MixStreamLayout-2-2

  • MixStreamLayout-2-3

  • MixStreamLayout-3-1

  • MixStreamLayout-3-2

  • MixStreamLayout-4-1

  • USERDEFINED (If you do not use a preset layout, set this parameter to USERDEFINED.)

Note

For more information, see Preset stream mix layouts.

MixStreamLayout-1-1
InputStreamList

string

Yes

The list of input streams. This is a JSON array.

For more information, see InputStreamConfig below.

[{"LayoutChildId":1,"ResourceType":"live","ResourceValue":"rtmp://example.net/live/f2139ec2b8d6a191068cd****ea9064d?auth_key=1600947017-0-0-0b5645fe35d21a65ab92b394bd4d****","LayoutConfig":{"FillMode":"fit","PositionRefer":"topLeft","FillPositionNormalized":[0,0],"FillSizeNormalized":[1,1]}}]
OutputConfig

string

Yes

The output configuration. This is a JSON string.

For more information, see OutputConfig below.

{"AppName":"liveApp****","StreamName":"9a78fb3f5c508be0122746f677a3****","MixStreamTemplate":"lp_hd_v","ExpireDuration":"86400"}
CallbackConfig

string

No

The webhook address. This is a JSON array. When an event occurs, the live service sends an HTTP POST request to this address. The request body contains the event details.

{"CallbackUrl":"http://aliyundoc.com"}

InputStreamConfig

NameTypeDescription
ResourceTypeStringThe resource type. live: A live streaming URL. url: A file streaming URL.
ResourceValueStringThe resource URL. If ResourceType is set to live, this is a live streaming URL. The URL can use the RTMP, FLV, or HLS protocol. The Alibaba Real-Time Communication (ARTC) protocol is not supported. If ResourceType is set to url, this is a file streaming URL.
LayoutChildIdStringThe ID of the layout pane. This ID also determines the stacking order (z-order) of the streams.
LayoutConfigLayoutConfig[]A JSON array that specifies the position, fill mode, and other layout information. This parameter is not required if you use a preset layout. If you set this parameter, the preset layout information corresponding to LayoutChildId is ignored.

LayoutConfig

NameTypeRequiredDescription
FillSizeNormalizedJSON array of floating-point numbersYesThe size of the area to fill for this layer element. [w,h]: The values of w and h range from 0 to 1. The width and height are normalized. For example, [0.2,0.3] indicates that the width is 20% of the total width and the height is 30% of the total height.
FillPositionNormalizedArray of floating-point numbersYesThe normalized position of the fill area for this layer element. [x,y]: The values of x and y range from 0 to 1. For example, [0.1,0.1] indicates a horizontal offset of 10% and a vertical offset of 10% from the top-left corner.
PositionReferStringNoThe reference point for the element's position coordinates. Set this parameter to topLeft. This value indicates the top-left corner.
FillModeStringNoThe fill mode for the element. none: No fill. fit: Scales the stream to fit the pane. The longest edge reaches the border, and black bars may be added to the shorter edge. fill: Scales the stream proportionally based on the larger of the width or height ratio, and then crops the stream to fill the entire pane. Set this parameter to fit.

OutputConfig

NameTypeRequiredDescription
AppNameStringYesThe name of the output application. Special characters such as # and ? are not supported.
StreamNameStringYesThe name of the output stream. Special characters such as # and ? are not supported.
MixStreamTemplateStringYesThe ID of the output stream mix template. Pass only the template ID, such as lp_ld. Valid values: lp_ld (resolution: 640 × 360), lp_sd (resolution: 854 × 480), lp_hd (resolution: 1280 × 720), lp_ud (resolution: 1920 × 1080), lp_ld_v (resolution: 640 × 360), lp_sd_v (resolution: 854 × 480), lp_hd_v (resolution: 1280 × 720), lp_ud_v (resolution: 1920 × 1080) , lp_ld_v_optm (resolution: 640 × 360), lp_sd_v_optm (resolution: 854 × 480), lp_hd_v_optm (resolution: 1280 × 720), lp_ud_v_optm (resolution: 1920 × 1080). _v indicates a vertical screen template. _optm indicates a low-latency template. The values in parentheses indicate the resolution of the template.
ExpireDurationLongNoThe expiration time of the task. Unit: seconds. Valid values: 1 to 31536000 (one year). If you do not set this parameter, the task expires and is deleted after seven days.

Response elements

Element

Type

Description

Example

object

MixStreamId

string

The ID of the stream mix task. Use this ID to query or delete the task.

5b2a046e-74d7-385e-253f-8a5b87e4****
RequestId

string

The request ID.

0D715397-2E66-4AE1-694h-C546628AD145

Examples

Success response

JSON format

{
  "MixStreamId": "5b2a046e-74d7-385e-253f-8a5b87e4****",
  "RequestId": "0D715397-2E66-4AE1-694h-C546628AD145"
}

Error codes

HTTP status code

Error code

Error message

Description
400 InvalidUserId.Malformed %s, please check userId. The userId passed in is invalid, please check.
400 InvalidParameter.Malformed There are invalid parameters: %s. There are invalid parameters: %s.
400 MissingParameter %s. Missing parameter
401 IllegalOperation %s, please check and try again later. Operation not allowed, please check and try again.
500 InternalError %s, please try again later. Internal error, please try again later.
403 MixStreamAlreadyExist %s, please check and try again later. The confluence task already exists, please check and try again.
403 MixStreamNotExist %s, please check and try again later. The confluous task does not exist. Please check and try again.
403 UserQuotaExceed Quota exceeded: %s. Quota exceeded: %s.
404 InvalidDomainName.NotFound %s, please check and try again later. Domain name does not exist, please check and try again.

See for a complete list.

Release notes

See Release Notes for a complete list.