> **Experimental**
>
> `@aws-cdk/aws-medialive-alpha` is an [**experimental**](/stability) (alpha) package: its API may change in any release, without a major version bump.
# RtmpOutputDefinition

Output definition for an RTMP output group.

`outputName` is normalised (underscores → hyphens) for use as the destination reference ID.

Extends: RtmpOutputDefinition
Extends: OutputDefinition

- Stability: [Experimental](/cdk/api/stability.html)
- Source: [`lib/outputs.ts`](https://github.com/aws/aws-cdk/blob/v2.274.0-alpha.0/packages/@aws-cdk/aws-medialive-alpha/lib/outputs.ts#L404)

## Example

```ts
// The code below shows an example of how to instantiate this type.
// The values are placeholders you should change.
import * as medialive_alpha from '@aws-cdk/aws-medialive-alpha';
import * as cdk from 'aws-cdk-lib';

declare const encodeConfiguration: medialive_alpha.EncodeConfiguration;
declare const rtmpCertificateMode: medialive_alpha.RtmpCertificateMode;
declare const rtmpDestination: medialive_alpha.RtmpDestination;
const rtmpOutputDefinition: medialive_alpha.RtmpOutputDefinition = {
  destinations: [rtmpDestination],
  encodes: [encodeConfiguration],
  outputName: 'outputName',

  // the properties below are optional
  certificateMode: rtmpCertificateMode,
  connectionRetryInterval: cdk.Duration.minutes(30),
  numRetries: 123,
};
```

## Properties

- `certificateMode`: [RtmpCertificateMode](/cdk/api/v2/docs/@aws-cdk_aws-medialive-alpha.RtmpCertificateMode.html) — The TLS certificate verification mode.

  **Default:** service default

- `connectionRetryInterval`: [Duration](/cdk/api/v2/docs/aws-cdk-lib.Duration.html) — The interval between connection retry attempts.

  **Default:** service default

- `destinations`: [RtmpDestination](/cdk/api/v2/docs/@aws-cdk_aws-medialive-alpha.RtmpDestination.html)[] (required) — The RTMP destination(s) for this output — one per channel pipeline.

  MediaLive publishes each RTMP output to one destination per pipeline (the console
  calls these "Destination A" and "Destination B"). Provide a single destination for a
  `SINGLE_PIPELINE` channel, or two (A then B) for a `STANDARD` channel.

- `encodes`: [EncodeConfiguration](/cdk/api/v2/docs/@aws-cdk_aws-medialive-alpha.EncodeConfiguration.html)[] (required) — The encode configurations to wire to this output.

- `numRetries`: number — The number of retry attempts.

  **Default:** service default

- `outputName`: string (required) — The name of this output.

  Must be unique across all outputs in the channel.