SubMiner/docs/jellyfin-integration.md

Jellyfin Integration

SubMiner includes an optional Jellyfin CLI integration for:

• authenticating against a server
• listing libraries and media items
• launching item playback in the connected mpv instance
• receiving Jellyfin remote cast-to-device playback events in-app
• opening an in-app setup window for server/user/password input

Requirements

• Jellyfin server URL and user credentials
• For --jellyfin-play: connected mpv IPC socket (--start or existing mpv plugin workflow)

Setup

1. Set base config values (config.jsonc):

{
  "jellyfin": {
    "enabled": true,
    "serverUrl": "http://127.0.0.1:8096",
    "username": "your-user",
    "remoteControlEnabled": true,
    "remoteControlAutoConnect": true,
    "autoAnnounce": false,
    "remoteControlDeviceName": "SubMiner",
    "defaultLibraryId": "",
    "pullPictures": false,
    "iconCacheDir": "/tmp/subminer-jellyfin-icons",
    "directPlayPreferred": true,
    "directPlayContainers": ["mkv", "mp4", "webm", "mov", "flac", "mp3", "aac"],
    "transcodeVideoCodec": "h264",
  },
}

2. Authenticate:

subminer jellyfin
subminer jellyfin -l \
  --server http://127.0.0.1:8096 \
  --username your-user \
  --password 'your-password'

3. List libraries:

SubMiner.AppImage --jellyfin-libraries

Launcher wrapper equivalent for interactive playback flow:

subminer jellyfin -p

Launcher wrapper for Jellyfin cast discovery mode (foreground app process):

subminer jellyfin -d

subminer jf ... is an alias for subminer jellyfin ....

To clear saved session credentials:

subminer jellyfin --logout

4. List items in a library:

SubMiner.AppImage --jellyfin-items --jellyfin-library-id LIBRARY_ID --jellyfin-search term

5. Start playback:

SubMiner.AppImage --start
SubMiner.AppImage --jellyfin-play --jellyfin-item-id ITEM_ID

Optional stream overrides:

• --jellyfin-audio-stream-index N
• --jellyfin-subtitle-stream-index N

Playback Behavior

• Direct play is attempted first when:
  • jellyfin.directPlayPreferred=true
  • media source supports direct stream
  • source container matches jellyfin.directPlayContainers
• If direct play is not selected/available, SubMiner requests a Jellyfin transcoded stream (master.m3u8) using jellyfin.transcodeVideoCodec.
• Resume position (PlaybackPositionTicks) is applied via mpv seek.
• Media title is set in mpv as [Jellyfin/<mode>] <title>.

Cast To Device Mode (jellyfin-mpv-shim style)

When SubMiner is running with a valid Jellyfin session, it can appear as a remote playback target in Jellyfin's cast-to-device menu.

Requirements

• jellyfin.enabled=true
• valid jellyfin.serverUrl and Jellyfin auth session (env override or stored login session)
• jellyfin.remoteControlEnabled=true (default)
• jellyfin.remoteControlAutoConnect=true (default)
• jellyfin.autoAnnounce=false by default (true enables auto announce/visibility check logs on connect)

Behavior

• SubMiner connects to Jellyfin remote websocket and posts playback capabilities.
• Play events open media in mpv with the same defaults used by --jellyfin-play.
• If mpv IPC is not connected at cast time, SubMiner auto-launches mpv in idle mode with SubMiner defaults and retries playback.
• Playstate events map to mpv pause/resume/seek/stop controls.
• Stream selection commands (SetAudioStreamIndex, SetSubtitleStreamIndex) are mapped to mpv track selection.
• SubMiner reports start/progress/stop timeline updates back to Jellyfin so now-playing and resume state stay synchronized.
• --jellyfin-remote-announce forces an immediate capability re-broadcast and logs whether server sessions can see the device.

Troubleshooting

• Device not visible in Jellyfin cast menu:
  • ensure SubMiner is running
  • ensure session token is valid (--jellyfin-login again if needed)
  • ensure remoteControlEnabled and remoteControlAutoConnect are true
• Cast command received but playback does not start:
  • verify mpv IPC can connect (--start flow)
  • verify item is playable from normal --jellyfin-play --jellyfin-item-id ...
• Frequent reconnects:
  • check Jellyfin server/network stability and token expiration

Failure Handling

User-visible errors are shown through CLI logs and mpv OSD for:

• invalid credentials
• expired/invalid token
• server/network errors
• missing library/item identifiers
• no playable source
• mpv not connected for playback

Security Notes and Limitations

• Jellyfin auth session (accessToken + userId) is stored in local encrypted token storage after login/setup.
• Optional environment overrides are supported: SUBMINER_JELLYFIN_ACCESS_TOKEN and SUBMINER_JELLYFIN_USER_ID.
• Treat both token storage and config files as secrets and avoid committing them.
• Password is used only for login and is not stored.
• Optional setup UI is available via --jellyfin; all actions are also available via CLI flags.
• subminer wrapper uses Jellyfin subcommands (subminer jellyfin ..., alias subminer jf ...). Use SubMiner.AppImage for direct --jellyfin-libraries and --jellyfin-items.
• For direct app CLI usage (SubMiner.AppImage ...), --jellyfin-server can override server URL for login/play flows without editing config.