Formats

Input formats

Audio

Format	Extensions
WAV	`.wav`
AIFF	`.aiff`, `.aif`
FLAC	`.flac`
MP3	`.mp3`
AAC	`.aac`, `.m4a`

For best results, use WAV at 16-bit or 24-bit depth. Supports up to 192kHz sample rate. Provide a stereo or mono track.

Video

Format	Extensions	Audio codec
MP4	`.mp4`	AAC or PCM
MOV	`.mov`	AAC or PCM

Only the audio stream is processed — video content is ignored.

Text

Format	Extensions	Use case
JSON	`.json`	Transcript input for the `alignment` model
TXT	`.txt`	Transcript input for the `alignment` model

Output formats

Set output formats in the formats array when creating a Task. Use the API value shown below.

Audio

Format	API value	Models
WAV	`wav`	All models that output audio
MP3	`mp3`	All models that output audio
FLAC	`flac`	All models that output audio
AIFF	`aiff`	All models that output audio

Video

Format	API value	Models
MP4	`mp4`	All models that output audio

Output video files contain the separated audio stream in the original video container.

Text

Format	API value	Models
JSON	`json`	`transcription`, `alignment`, `music_detection`
SRT	`srt`	`transcription`, `alignment`
TXT	`txt`	`transcription`, `alignment`, `music_detection`

Limitations

Encrypted or DRM-protected content is not supported
Multi-channel or surround formats (e.g. 5.1) are not supported

API Overview

Assets

Tasks

Input formats

Audio

Video

Text

Output formats

Audio

Video

Text

Limitations

​Input formats

​Audio

​Video

​Text

​Output formats

​Audio

​Video

​Text

​Limitations

Input formats

Audio

Video

Text

Output formats

Audio

Video

Text

Limitations