Media - Video - Audio - Extract

Type identifier: media:video:audio:extract Category: Media Operations

Description

The Media - Video - Audio - Extract node reads a video file, extracts the first audio stream, and outputs a new audio file.

The node supports:

A Match original format toggle (enabled by default)
Optional explicit output format, bitrate, and sample rate when match-original is disabled
Dynamic values for output format, bitrate, and sample rate when match-original is disabled
Auto-detection of output format when match-original is enabled, or when no explicit output format is provided

If format detection fails, the node falls back to mp3.

Handle	Data Type	Description
`trigger`	`control`	Trigger input for flow control.
`videoInput`	`file`	Source video file.
`outputFormat`	`string`	(Dynamic) Output audio format (`mp3`, `wav`, `m4a`, `ogg`, `flac`, `aac`).
`bitrate`	`number`	(Dynamic) Target audio bitrate in kbps.
`sampleRate`	`number`	(Dynamic) Target sample rate in Hz.

Note: Dynamic input handles appear only when Match original format is disabled and the corresponding field is set to dynamic.

Handle	Data Type	Description
`success`	`control`	Triggered when extraction succeeds.
`error`	`control`	Triggered when extraction fails.
`audioOutput`	`file`	Extracted audio file.

Option	Type	Default	Description
Match original format	`boolean`	`true`	When enabled, output format is inferred from the source audio stream and advanced options are hidden.
Output Format	enum/dynamic	`null`	Output audio format. Available only when Match original format is disabled.
Bitrate	number/dynamic	`null`	Output bitrate in kbps. Available only when Match original format is disabled.
Sample Rate	number/dynamic	`null`	Output sample rate in Hz. Available only when Match original format is disabled.

Reads the videoInput file.
If Match original format is disabled, uses the configured output format, bitrate, and sample rate, including dynamic values.
Detects the output format from the source audio stream if Match original format is enabled or no explicit output format is provided.
Extracts and encodes the audio from the video.
Returns the extracted audio as audioOutput.