coverart-cli 0.4.0

Fetch missing album covers from Last.fm, iTunes, Deezer, MusicBrainz; embed in MP3/M4A/FLAC/Ogg and write a cover.jpg sidecar

coverart-cli

Fill the missing covers in your music library — embed and sidecar in one pass.

What it does

Most cover-art tools only embed or only sidecar. That breaks across players — Subsonic apps (Amperfy, Symfonium) read tags, Plex / Jellyfin prefer cover.jpg, Apple Music wants embedded. coverart-cli does both in one pass and ships an HTML coverage report so you can see what's still missing.

Install

pipx install git+https://github.com/WildDragonKing/coverart-cli

Use

# Fetch + embed + sidecar (free providers — no key needed)
coverart ~/Music

# Add Last.fm too (much higher hit rate)
LASTFM_API_KEY=xxx coverart ~/Music

# Just generate the coverage report
coverart ~/Music --report-only --report-html report.html

# See what would happen, change nothing
coverart ~/Music --dry-run -v

Run coverart --help for the full flag list.

Config file

Save your defaults so you don't have to repeat flags:

# ~/.config/coverart-cli/config.toml
lastfm_key      = "your-key"
min_bytes       = 30000
replace_smaller = true
no_musicbrainz  = false

Lookup order (later wins): built-in → ~/.config/coverart-cli/config.toml → ./coverart.toml → --config PATH → CLI flags → environment variables. Run coverart ~/Music afterwards with no flags.

Sources

Tried in order until a cover is found:

1. Last.fm — album.getinfo (needs a free API key)
2. iTunes — Apple Music's public search, no key
3. Deezer — public API, no key
4. MusicBrainz + Cover Art Archive — fallback for niche releases

Supported formats

MP3 (ID3 APIC), M4A/M4B/MP4 (covr atom), FLAC (Picture block), Ogg Vorbis / Opus (metadata_block_picture).

Programmatic use

from pathlib import Path
from coverart_cli.core import RunOptions, run
from coverart_cli.providers import ITunesProvider, DeezerProvider

stats = run(RunOptions(
    root=Path("~/Music").expanduser(),
    providers=[ITunesProvider(), DeezerProvider()],
))
print(stats.fetched_from, stats.not_found)

Alternatives

Tool	When to pick it
sacad	Best match rate; Rust binary, more sources
get-cover-art	Battle-tested Python API
beets fetchart	Already using beets for everything else
coverart-cli (this)	You want the HTML report + embed/sidecar dual-output in ~700 LOC

Development

git clone https://github.com/WildDragonKing/coverart-cli && cd coverart-cli
python3 -m venv .venv && source .venv/bin/activate
pip install -e ".[dev]"
pytest && ruff check .

Releases

Releases are fully automated via release-please. Commits to main follow Conventional Commits:

Commit prefix	Effect on next release
feat: …	minor bump (0.3.0 → 0.4.0)
fix: …	patch bump (0.3.0 → 0.3.1)
feat!: … / BREAKING CHANGE:	major bump (0.3.0 → 1.0.0)
docs:, refactor:, perf:	changelog entry, no bump
chore:, ci:, test:	hidden in changelog

release-please opens a single rolling "Release PR" that accumulates the pending version. Merging that PR creates the git tag, which triggers the PyPI publish workflow.

License

MIT