ferraus info

Probe a file: container, codec, duration, rate, channels, bit depth, bitrate, tags, art

Synopsis

ferraus info <input> [options] [-o <output>]

Reads the container header (and, for video files, lists every stream) without decoding the audio. Add --loudness for an EBU R128 measurement (integrated loudness, loudness range, true peak) or --spectrum for 1/3-octave band averages; both decode the file in a streaming pass.

Examples

Container, codec, duration, sample rate, channels, bit depth, bitrate, tags

ferraus info song.flac

Integrated loudness, LRA, and true peak as JSON

ferraus info mix.wav --loudness --json

Audio track of a video file plus a 1/3-octave spectrum

ferraus info interview.mp4 --spectrum

Options

Flag	Type	Default	Meaning
`--loudness`	flag	—	Measure EBU R128 integrated loudness (LUFS), loudness range (LU), and true peak (dBTP) [default: off]
`--spectrum`	flag	—	Average level per 1/3-octave band, 25 Hz to 20 kHz, in dB relative to a full-scale sine [default: off]

Global options

Every command also accepts the global options (-o, --json, --dry-run, --overwrite, --progress, ...). See Global options.

Exit codes

Code	Meaning
0	Success
1	Processing failed
2	Usage or parameter error
3	Input missing or unreadable
4	Unsupported format or codec
8	Cancelled
70	Internal error (bug)

Common mistakes

Forgetting that outputs are never overwritten: pass --overwrite or a new -o path when re-running.

For models

MCP tool: ferraus_info
Schema: ferraus schema info
Pipeline: { op: info, args: { ... } } (flag names with _ instead of -)
fx stage: no

{"command": "info", "defaults": {}}