# Returns a single CompositionHook resource identified by a CompositionHook SID.

**GET /v1/CompositionHooks/{Sid}**

Returns a single CompositionHook resource identified by a CompositionHook SID.
Recording composition hooks

## Servers
- https://video.twilio.com: https://video.twilio.com ()


## Authentication methods
- Account sid auth token


## Parameters

### Path parameters
- **Sid** (string)
  The SID of the CompositionHook resource to fetch.



## Responses
### 200
OK
#### Headers
- **Access-Control-Allow-Origin** (string)
  Specify the origin(s) allowed to access the resource
- **Access-Control-Allow-Methods** (string)
  Specify the HTTP methods allowed when accessing the resource
- **Access-Control-Allow-Headers** (string)
  Specify the headers allowed when accessing the resource
- **Access-Control-Allow-Credentials** (boolean)
  Indicates whether the browser should include credentials
- **Access-Control-Expose-Headers** (string)
  Headers exposed to the client

#### Body: application/json (object)
- **account_sid** (string | null)
  The SID of the [Account](https://www.twilio.com/docs/iam/api/account) that created the CompositionHook resource.
- **friendly_name** (string | null)
  The string that you assigned to describe the resource. Can be up to 100 characters long and must be unique within the account.
- **enabled** (boolean | null)
  Whether the CompositionHook is active. When `true`, the CompositionHook is triggered for every completed Group Room on the account. When `false`, the CompositionHook is never triggered.
- **date_created** (string(date-time) | null)
  The date and time in GMT when the resource was created specified in [ISO 8601](https://en.wikipedia.org/wiki/ISO_8601) format.
- **date_updated** (string(date-time) | null)
  The date and time in GMT when the resource was last updated specified in [ISO 8601](https://en.wikipedia.org/wiki/ISO_8601) format.
- **sid** (string | null)
  The unique string that we created to identify the CompositionHook resource.
- **audio_sources** (array[string] | null)
  The array of track names to include in the compositions created by the composition hook. A composition triggered by the composition hook includes all audio sources specified in `audio_sources` except those specified in `audio_sources_excluded`. The track names in this property can include an asterisk as a wild card character, which matches zero or more characters in a track name. For example, `student*` includes tracks named `student` as well as `studentTeam`. Please, be aware that either video_layout or audio_sources have to be provided to get a valid creation request
- **audio_sources_excluded** (array[string] | null)
  The array of track names to exclude from the compositions created by the composition hook. A composition triggered by the composition hook includes all audio sources specified in `audio_sources` except for those specified in `audio_sources_excluded`. The track names in this property can include an asterisk as a wild card character, which matches zero or more characters in a track name. For example, `student*` excludes `student` as well as `studentTeam`. This parameter can also be empty.
- **video_layout** (object | null)
  A JSON object that describes the video layout of the composition in terms of regions as specified in the HTTP POST request that created the CompositionHook resource. See [POST Parameters](https://www.twilio.com/docs/video/api/compositions-resource#http-post-parameters) for more information. Please, be aware that either video_layout or audio_sources have to be provided to get a valid creation request
- **resolution** (string | null)
  The dimensions of the video image in pixels expressed as columns (width) and rows (height). The string's format is `{width}x{height}`, such as `640x480`.
- **trim** (boolean | null)
  Whether intervals with no media are clipped, as specified in the POST request that created the CompositionHook resource. Compositions with `trim` enabled are shorter when the Room is created and no Participant joins for a while as well as if all the Participants leave the room and join later, because those gaps will be removed. See [Specifying Video Layouts](https://www.twilio.com/docs/video/api/compositions-resource#specifying-video-layouts) for more info.
- **format** (string)
  The container format of the media files used by the compositions created by the composition hook. If `mp4` or `webm`, `audio_sources` must have one or more tracks and/or a `video_layout` element must contain a valid `video_sources` list, otherwise an error occurs.
- **status_callback** (string(uri) | null)
  The URL we call using the `status_callback_method` to send status information to your application.
- **status_callback_method** (string(http-method) | null)
  The HTTP method we should use to call `status_callback`. Can be `POST` or `GET` and defaults to `POST`.
- **url** (string(uri) | null)
  The absolute URL of the resource.


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