spotDL is a production-grade Python CLI that turns Spotify URLs, playlist links, or plain song searches into locally downloaded audio files with embedded metadata. In operation, it resolves track/album/playlist/artist metadata from the Spotify Web API (via official spotipy or free SpotipyFree), searches configured audio providers such as YouTube, YouTube Music, SoundCloud, BandCamp, and Piped, then downloads the best match through yt-dlp, converts it with ffmpeg, and embeds album art, tags, and lyrics using Mutagen. Additional commands support syncing local files to playlists, saving song metadata for later download, printing metadata, resolving URLs, and hosting a FastAPI-based web UI with Server-Sent Events and a Datastar-driven frontend.
Podsync is a Go-based service that converts video/audio content from YouTube, Vimeo, SoundCloud, and Twitch into podcast RSS feeds. It downloads media via yt-dlp, stores metadata in BadgerDB, and serves feeds via an HTTP server. The architecture is modular: platform-specific builders (pkg/builder/) query APIs to discover episodes, a downloader (pkg/ytdl/) handles media retrieval, and a feed generator (pkg/feed/) produces iTunes-compatible RSS and OPML. The system supports cron-based scheduling, episode filtering by regex/duration/age, cleanup policies, API key rotation, and hooks for custom workflows. It runs as a standalone binary or Docker container with local or S3 storage.