# Multiplex: start


## URI


`/prod/multiplexes/multiplexId/start`

## HTTP methods


### POST


**Operation ID:** `StartMultiplex`


**Path parameters**  

| Name | Type | Required | Description | 
| --- |--- |--- |--- |
| multiplexId | String | True |  | 


**Responses**  

| Status code | Response model | Description | 
| --- |--- |--- |
| 202 | Multiplex | 202 response | 
| 400 | InvalidRequest | 400 response | 
| 403 | AccessDenied | 403 response | 
| 404 | ResourceNotFound | 404 response | 
| 409 | ResourceConflict | 409 response | 
| 429 | LimitExceeded | 429 response | 
| 500 | InternalServiceError | 500 response | 
| 502 | BadGatewayException | 502 response | 
| 504 | GatewayTimeoutException | 504 response | 

## Schemas


### Response bodies


#### Multiplex schema
Multiplex

```
{
  "arn": "string",
  "availabilityZones": [
    "string"
  ],
  "destinations": [
    {
      "mediaConnectSettings": {
        "entitlementArn": "string"
      }
    }
  ],
  "id": "string",
  "multiplexSettings": {
    "maximumVideoBufferDelayMilliseconds": integer,
    "transportStreamBitrate": integer,
    "transportStreamId": integer,
    "transportStreamReservedBitrate": integer
  },
  "name": "string",
  "pipelinesRunningCount": integer,
  "programCount": integer,
  "state": enum,
  "tags": {
  }
}
```

#### InvalidRequest schema
InvalidRequest

```
{
  "message": "string"
}
```

#### AccessDenied schema
AccessDenied

```
{
  "message": "string"
}
```

#### ResourceNotFound schema
ResourceNotFound

```
{
  "message": "string"
}
```

#### ResourceConflict schema
ResourceConflict

```
{
  "message": "string"
}
```

#### LimitExceeded schema
LimitExceeded

```
{
  "message": "string"
}
```

#### InternalServiceError schema
InternalServiceError

```
{
  "message": "string"
}
```

#### BadGatewayException schema
BadGatewayException

```
{
  "message": "string"
}
```

#### GatewayTimeoutException schema
GatewayTimeoutException

```
{
  "message": "string"
}
```

## Properties


### AccessDenied



| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| message | string | False |  | 

### BadGatewayException



| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| message | string | False |  | 

### GatewayTimeoutException



| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| message | string | False |  | 

### InternalServiceError



| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| message | string | False |  | 

### InvalidRequest



| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| message | string | False |  | 

### LimitExceeded



| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| message | string | False |  | 

### Multiplex


The multiplex object.


| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| arn | string | False | The unique arn of the multiplex. | 
| availabilityZones | Array of type string | False | A list of availability zones for the multiplex. | 
| destinations | Array of type [MultiplexOutputDestination](#multiplexes-multiplexid-start-model-multiplexoutputdestination) | False | A list of the multiplex output destinations. | 
| id | string | False | The unique id of the multiplex. | 
| multiplexSettings | [MultiplexSettings](#multiplexes-multiplexid-start-model-multiplexsettings) | False | Configuration for a multiplex event. | 
| name | string | False | The name of the multiplex. | 
| pipelinesRunningCount | integer | False | The number of currently healthy pipelines. | 
| programCount | integer | False | The number of programs in the multiplex. | 
| state | [MultiplexState](#multiplexes-multiplexid-start-model-multiplexstate) | False | The current state of the multiplex. | 
| tags | [Tags](#multiplexes-multiplexid-start-model-tags) | False | A collection of key-value pairs. | 

### MultiplexMediaConnectOutputDestinationSettings


Multiplex MediaConnect output destination settings.


| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| entitlementArn | stringMinLength: 1 | False | The MediaConnect entitlement ARN available as a Flow source. | 

### MultiplexOutputDestination


Multiplex output destination settings


| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| mediaConnectSettings | [MultiplexMediaConnectOutputDestinationSettings](#multiplexes-multiplexid-start-model-multiplexmediaconnectoutputdestinationsettings) | False | Multiplex MediaConnect output destination settings. | 

### MultiplexSettings


Contains configuration for a Multiplex event


| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| maximumVideoBufferDelayMilliseconds | integerMinimum: 800Maximum: 3000 | False | Maximum video buffer delay in milliseconds. | 
| transportStreamBitrate | integerMinimum: 1000000Maximum: 100000000 | True | Transport stream bit rate. | 
| transportStreamId | integerMinimum: 0Maximum: 65535 | True | Transport stream ID. | 
| transportStreamReservedBitrate | integerMinimum: 0Maximum: 100000000 | False | Transport stream reserved bit rate. | 

### MultiplexState


The current state of the multiplex.
+ `CREATING`
+ `CREATE_FAILED`
+ `IDLE`
+ `STARTING`
+ `RUNNING`
+ `RECOVERING`
+ `STOPPING`
+ `DELETING`
+ `DELETED`

### ResourceConflict



| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| message | string | False |  | 

### ResourceNotFound



| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| message | string | False |  | 

### Tags



| Property | Type | Required | Description | 
| --- |--- |--- |--- |
| `*` | string | False |  | 

## See also


For more information about using this API in one of the language-specific AWS SDKs and references, see the following:

### StartMultiplex

+ [AWS Command Line Interface V2](/goto/cli2/medialive-2017-10-14/StartMultiplex)
+ [AWS SDK for .NET V4](/goto/DotNetSDKV4/medialive-2017-10-14/StartMultiplex)
+ [AWS SDK for C\$1\$1](/goto/SdkForCpp/medialive-2017-10-14/StartMultiplex)
+ [AWS SDK for Go v2](/goto/SdkForGoV2/medialive-2017-10-14/StartMultiplex)
+ [AWS SDK for Java V2](/goto/SdkForJavaV2/medialive-2017-10-14/StartMultiplex)
+ [AWS SDK for JavaScript V3](/goto/SdkForJavaScriptV3/medialive-2017-10-14/StartMultiplex)
+ [AWS SDK for Kotlin](/goto/SdkForKotlin/medialive-2017-10-14/StartMultiplex)
+ [AWS SDK for PHP V3](/goto/SdkForPHPV3/medialive-2017-10-14/StartMultiplex)
+ [AWS SDK for Python](/goto/boto3/medialive-2017-10-14/StartMultiplex)
+ [AWS SDK for Ruby V3](/goto/SdkForRubyV3/medialive-2017-10-14/StartMultiplex)