| Parameter | Description | Allowed Values | Default Value |
|---|---|---|---|
| type | Specify which streams will use types. | video – Everything but audio_only streams. audio – for audio_only streams. video_audio – for all streams. | video_audio |
| video_name | Specify the name of the video stream for the main source. | String | none |
| audio_name | Specify the name of the audio stream for the main source. | String | none |
| use_stream_id | Specify which soure's stream will be processed. | Comma separated list of steam IDs. | none |
| language | Specify the language attribute for the main source. | Valid language name. | none |
| role | Main Source Role | main, alternate, supplementary, commentary, description, metadata | none |