Extract Audio Track

Extract the audio track from a video file and return it as a standalone audio file.

When to use

• Create a podcast or audio-only version of a recorded talk or webinar.
• Extract background music from a video to reuse elsewhere.
• Transcribe audio — feed the extracted track to a speech-to-text pipeline.

Inputs & outputs

Input modality	Video file (URL)
Output modality	Audio file (GCS URL)
Supported output formats	mp3, wav, aac
Max input duration	30 min

Parameters

Param	Required	Description
format	yes	Output audio format — mp3, wav, or aac
bitrate	no	Target bitrate as <int>[k|M], e.g. 192k. Applies to compressed formats.

Examples

Extract MP3 at 192k

{
  "type": "video.extract_audio",
  "input": { "video_url": "gs://infery-prod-media/example/webinar.mp4" },
  "params": { "format": "mp3", "bitrate": "192k" }
}

Extract lossless WAV for further processing

{
  "type": "video.extract_audio",
  "input": { "video_url": "gs://infery-prod-media/example/recording.mp4" },
  "params": { "format": "wav" }
}

Related capabilities

• video.trim — trim the video to the relevant section before extracting audio
• video.pipeline — chain trim and audio extraction in one request

{
  "format": "mp3",
  "bitrate": "192k"
}