mls — Media LS

Terminal-native audio/video/image file browser with metadata columns, TUI preview, and structured JSON output.

Think fd meets ffprobe meets lazygit.

Dual-mode: interactive TUI when you're at the terminal, streaming JSON when piped — one tool for humans and scripts.

mls ~/Videos          # TUI browser
mls ~/Videos | jq .   # streaming NDJSON

Install

Homebrew (macOS)

brew install thepushkarp/tap/mls

Cargo

cargo install media-ls

Build from source

git clone https://github.com/thepushkarp/mls.git
cd mls
cargo build --release   # requires Rust 1.85+
cp target/release/mls ~/.local/bin/  # or anywhere on PATH

Prerequisites

brew install ffmpeg mpv trash

Dependency	Required	Purpose
ffprobe (via ffmpeg)	Yes	Metadata extraction
ffmpeg	Yes	Thumbnail generation
mpv	No	Playback (warned if missing)
trash	No	Safe delete in triage mode

Usage

Browse (default)

mls                           # current directory, TUI
mls ~/Videos ~/Music          # multiple paths
mls --max-depth 3 ~/Media     # limit recursion

Output mode is auto-detected:

• TTY → TUI
• Piped → NDJSON

Force a mode with --tui, --json, or --ndjson.

Structured output

# Single JSON document
mls --json ~/Videos

# Streaming NDJSON (one record per line, as files are probed)
mls --ndjson ~/Videos

# Pipe to jq
mls ~/Videos | jq '.entry.media.kind'

# Filter + sort + limit
mls --json --filter 'duration_ms > 60000' --sort duration_ms:desc --limit 10 .

Inspect a file

mls info movie.mp4
mls info *.mp4                # multiple files

Outputs detailed JSON metadata for each file.

Play

mls play video.mp4            # video playback via mpv
mls play song.flac            # audio-only (auto-detected)

Triage

Interactive keep/delete workflow for batch culling:

mls triage ~/Downloads

Press y to keep, n to delete (moves to Trash via trash), u to undo.

TUI Keybindings

Navigation

Key	Action
j / ↓	Move down
k / ↑	Move up
l / → / Enter	Enter directory or open file
h / ← / Backspace	Go to parent directory
g	Jump to top
G	Jump to bottom
Ctrl-d	Page down (half screen)
Ctrl-u	Page up (half screen)

Features

Key	Action
/	Filter (fuzzy by default, prefix = for structured expressions)
s	Cycle sort key (name → size → date → duration → resolution → codec → bitrate)
S	Reverse sort direction
i	Toggle metadata panel
1 / 2 / 3 / 4	Kind filter: All / Video / Audio / Image
Space	Mark/unmark file
?	Help overlay

Playback

Key	Action
p	Play/pause current file via mpv
P	Stop playback
]	Seek forward 10s
[	Seek backward 10s

Triage mode

Key	Action
t	Enter triage mode
y	Keep current file
n	Delete (move to Trash)
m	Move to directory (text input)
u	Undo last action
h / l	Navigate without triaging
p	Play current file
q / Esc	Exit triage, show summary

Quit

Key	Action
q	Quit
Ctrl-c	Quit

Filter expressions

In the TUI, / opens fuzzy name search by default. Prefix with = for structured field expressions. On the CLI, --filter always uses structured expressions.

Filter media files by metadata fields using a simple expression language:

mls --filter 'duration_ms > 60000'                    # longer than 1 minute
mls --filter 'media.video.width >= 1920'               # 1080p+
mls --filter 'media.audio.codec.name == "aac"'         # AAC audio
mls --filter 'media.kind == "av" && duration_ms > 300000'  # video over 5 min
mls --filter 'extension == "mp4" || extension == "mkv"'    # specific formats

Operators: == != > >= < <=

Combinators: && (and), || (or), ! (not), () (grouping)

Values: numbers (60000, 1920.0), quoted strings ("aac", 'mp4'), bare identifiers

Field paths (dot-separated, resolved against the MediaEntry JSON schema):

• duration_ms, extension, path
• media.kind ("video", "audio", "av", "image")
• media.video.width, media.video.height, media.video.codec.name
• media.audio.codec.name, media.audio.channels, media.audio.channel_layout, media.audio.sample_rate_hz
• media.exif.camera_make, media.exif.camera_model, media.exif.lens_model, media.exif.focal_length_mm, media.exif.aperture, media.exif.exposure_time, media.exif.iso, media.exif.date_taken, media.exif.gps_latitude, media.exif.gps_longitude, media.exif.orientation
• fs.size_bytes, fs.modified_at, fs.created_at

Shorthand aliases: duration_ms, size_bytes, kind, width, height, bitrate / bitrate_bps, camera (→ media.exif.camera_model), iso (→ media.exif.iso)

Sort keys

mls --sort name              # ascending by default
mls --sort duration_ms:desc  # explicit direction
mls --sort size:asc

Key	Aliases	Description
name	—	File name
path	—	Full path
size	—	File size
modified	date	Modification time
duration_ms	duration	Duration in ms
resolution	—	Pixel area (width x height)
codec	—	Video codec (falls back to audio)
bitrate	—	Overall bitrate

JSON schema

Version: 0.1.0

JSON output (--json)

{
  "type": "mls.list",
  "schema_version": "0.1.0",
  "mls_version": "0.1.0",
  "generated_at": "2025-12-01T12:00:00Z",
  "entries": [
    {
      "path": "/Users/me/Videos/clip.mp4",
      "extension": "mp4",
      "media": {
        "kind": "av",
        "duration_ms": 125400,
        "video": {
          "width": 1920, "height": 1080,
          "codec": { "name": "h264", "profile": "High", "level": "4.1" },
          "fps": { "num": 24000, "den": 1001 },
          "bitrate_bps": 5200000
        },
        "audio": {
          "codec": { "name": "aac", "profile": "LC" },
          "channels": 2, "channel_layout": "stereo", "sample_rate_hz": 48000,
          "bitrate_bps": 128000
        }
      },
      "fs": { "size_bytes": 81920000, "modified_at": "2025-12-01T10:30:00Z", "created_at": "2025-11-30T08:00:00Z" },
      "probe": { "backend": "ffprobe", "took_ms": 42 }
    }
  ],
  "summary": {
    "entries_total": 1, "entries_emitted": 1,
    "probe_ok": 1, "probe_error": 0
  },
  "errors": []
}

NDJSON output (--ndjson / piped)

One JSON object per line, streamed as files are probed:

{"type":"mls.header","schema_version":"0.1.0","mls_version":"0.1.0","generated_at":"2025-12-01T12:00:00Z"}
{"type":"mls.entry","entry":{...}}
{"type":"mls.footer","summary":{...},"errors":[]}

Exit codes

Code	Meaning
0	Success
1	Generic/unexpected error
2	CLI usage error (bad flag, invalid filter/sort)
4	Missing dependency (ffprobe/ffmpeg not found)

Supported formats

Video: mp4, mkv, mov, avi, wmv, flv, webm, m4v, mpg, mpeg, ts, mts, m2ts, vob, ogv, 3gp, 3g2

Audio: mp3, flac, wav, aac, ogg, opus, wma, m4a, aiff, aif, alac, ape, dsf, dff, wv, mka

Image: jpg, jpeg, png, webp, gif, bmp, tiff, tif

Development

cargo build                   # debug build
cargo test
cargo clippy --all-targets --all-features -- -D warnings  # zero warnings
cargo fmt --check             # formatting

Release build (LTO + strip):

cargo build --release

License

MIT