# Stream `Stream` represents a particular stream from a media item, such as the video stream, audio stream, or subtitle stream. The stream may either be part of the file represented by the parent `Part` or, especially for subtitles, an external file. The stream contains more detailed information about the specific stream. For example, a video may include the `aspectRatio` at the `Media` level, but detailed information about the video stream like the color space will be included on the `Stream` for the video stream. Note that photos do not have streams (mostly as an optimization). ## Fields | Field | Type | Required | Description | Example | | -------------------------------------------------------------------- | -------------------------------------------------------------------- | -------------------------------------------------------------------- | -------------------------------------------------------------------- | -------------------------------------------------------------------- | | `default_` | *Optional\* | :heavy_minus_sign: | Indicates if this stream is default. | true | | `audioChannelLayout` | *Optional\* | :heavy_minus_sign: | Audio channel layout. | 5.1(side) | | `channels` | *Optional\* | :heavy_minus_sign: | Number of audio channels (for audio streams). | 6 | | `bitDepth` | *Optional\* | :heavy_minus_sign: | Bit depth of the video stream. | 10 | | `doviblCompatID` | *Optional\* | :heavy_minus_sign: | Dolby Vision BL compatibility ID. | 1 | | `doviblPresent` | *Optional\* | :heavy_minus_sign: | Indicates if Dolby Vision BL is present. | true | | `dovielPresent` | *Optional\* | :heavy_minus_sign: | Indicates if Dolby Vision EL is present. | false | | `doviLevel` | *Optional\* | :heavy_minus_sign: | Dolby Vision level. | 6 | | `doviPresent` | *Optional\* | :heavy_minus_sign: | Indicates if Dolby Vision is present. | true | | `doviProfile` | *Optional\* | :heavy_minus_sign: | Dolby Vision profile. | 8 | | `dovirpuPresent` | *Optional\* | :heavy_minus_sign: | Indicates if Dolby Vision RPU is present. | true | | `doviVersion` | *Optional\* | :heavy_minus_sign: | Dolby Vision version. | 1.0 | | `bitrate` | *Optional\* | :heavy_minus_sign: | Bitrate of the stream. | 24743 | | `canAutoSync` | *Optional\* | :heavy_minus_sign: | Indicates if the stream can auto-sync. | false | | `chromaLocation` | *Optional\* | :heavy_minus_sign: | Chroma sample location. | topleft | | `chromaSubsampling` | *Optional\* | :heavy_minus_sign: | Chroma subsampling format. | 4:2:0 | | `codedHeight` | *Optional\* | :heavy_minus_sign: | Coded video height. | 1608 | | `codedWidth` | *Optional\* | :heavy_minus_sign: | Coded video width. | 3840 | | `closedCaptions` | *Optional\* | :heavy_minus_sign: | N/A | true | | `codec` | *String* | :heavy_check_mark: | Codec used by the stream. | hevc | | `colorPrimaries` | *Optional\* | :heavy_minus_sign: | Color primaries used. | bt2020 | | `colorRange` | *Optional\* | :heavy_minus_sign: | Color range (e.g., tv). | tv | | `colorSpace` | *Optional\* | :heavy_minus_sign: | Color space. | bt2020nc | | `colorTrc` | *Optional\* | :heavy_minus_sign: | Color transfer characteristics. | smpte2084 | | `displayTitle` | *String* | :heavy_check_mark: | Display title for the stream. | 4K DoVi/HDR10 (HEVC Main 10) | | `extendedDisplayTitle` | *Optional\* | :heavy_minus_sign: | Extended display title for the stream. | 4K DoVi/HDR10 (HEVC Main 10) | | `frameRate` | *Optional\* | :heavy_minus_sign: | Frame rate of the stream. | 23.976 | | `hasScalingMatrix` | *Optional\* | :heavy_minus_sign: | N/A | false | | `height` | *Optional\* | :heavy_minus_sign: | Height of the video stream. | 1602 | | `id` | *int* | :heavy_check_mark: | Unique stream identifier. | 1002625 | | `index` | *Optional\* | :heavy_minus_sign: | Index of the stream. | 0 | | `key` | *String* | :heavy_check_mark: | Key to access this stream part. | /library/streams/216389 | | `language` | *Optional\* | :heavy_minus_sign: | Language of the stream. | English | | `languageCode` | *Optional\* | :heavy_minus_sign: | ISO language code. | eng | | `languageTag` | *Optional\* | :heavy_minus_sign: | Language tag (e.g., en). | en | | `format` | *Optional\* | :heavy_minus_sign: | Format of the stream (e.g., srt). | srt | | `headerCompression` | *Optional\* | :heavy_minus_sign: | Indicates whether header compression is enabled. | true | | `level` | *Optional\* | :heavy_minus_sign: | Video level. | 150 | | `original` | *Optional\* | :heavy_minus_sign: | Indicates if this is the original stream. | true | | `profile` | *Optional\* | :heavy_minus_sign: | Video profile. | main 10 | | `refFrames` | *Optional\* | :heavy_minus_sign: | Number of reference frames. | 1 | | `samplingRate` | *Optional\* | :heavy_minus_sign: | Sampling rate for the audio stream. | 48000 | | `scanType` | *Optional\* | :heavy_minus_sign: | N/A | progressive | | `embeddedInVideo` | *Optional\* | :heavy_minus_sign: | N/A | progressive | | `selected` | *Optional\* | :heavy_minus_sign: | Indicates if this stream is selected (applicable for audio streams). | true | | `forced` | *Optional\* | :heavy_minus_sign: | N/A | true | | `hearingImpaired` | *Optional\* | :heavy_minus_sign: | Indicates if the stream is for the hearing impaired. | true | | `dub` | *Optional\* | :heavy_minus_sign: | Indicates if the stream is a dub. | true | | `title` | *Optional\* | :heavy_minus_sign: | Optional title for the stream (e.g., language variant). | SDH | | `streamIdentifier` | *Optional\* | :heavy_minus_sign: | N/A | 1 | | `streamType` | *long* | :heavy_check_mark: | Stream type:
- VIDEO = 1
- AUDIO = 2
- SUBTITLE = 3
| | | `width` | *Optional\* | :heavy_minus_sign: | Width of the video stream. | 3840 | | `additionalProperties` | Map\ | :heavy_minus_sign: | N/A | |