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lizardbyte/themerrDocumentation

Theme song manager for Plex and Jellyfin using ThemerrDB.

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Quick Install
pip install themerr
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Themerr

Theme song manager for Plex and Jellyfin using ThemerrDB.

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Overview

ℹ️ About

Themerr adds theme music to Plex and Jellyfin movies, TV shows, and collections from ThemerrDB. It listens for Plex library updates and can also scan supported libraries on a schedule. YouTube audio streams are resolved with yt-dlp.

It works with the Plex Movie (tv.plex.agents.movie) and Plex Series (tv.plex.agents.series) agents. Install and configure the application separately from your media server. Plex does not require a plug-in; Themerr installs its matching connector on Jellyfin.

LizardByte has the full documentation hosted on Read the Docs.

Document mirror archived from official upstream repository · Visit upstream GitHub
Snapshot date: 2026-11-08