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External files

Audio and subtitles will usually be embedded within your video container file (e.g. mkv), but the server also supports loading audio and subtitle streams from external files. The server supports reading either single files or containers like mka (Matroska Audio) or mks (Matroska Subtitle) with one or more streams.


External audio files and containers are supported on Jellyfin 10.8 and later.


Jellyfin will search for external files that exactly match the video filename. They can optionally include a language which will only be used if the language cannot be determined from the file metadata.

If multiple languages are defined within the filename the last one will be used and the others ignored.

Simple example

/Film (1946)

Naming Flags


Support for naming flags is coming with the next feature release for Jellyfin. Until then it is recommended you avoid adding additional flags. This is especially true for hi flags (see note below).

Additional flags can be appended to the filename (separated by the . delimiter) to add metadata. Supported metadata and flags are:

  • Default: default
    • Marks the stream as the default.
  • Forced: forced, foreign
    • Marks the subtitle stream as forced, typically used for translation of segments of audio/text that differ from the primary language.
  • Hearing Impaired (Jellyfin 10.9+): sdh, cc, hi
    • Indicates that the subtitle stream has additional information to help viewers that are hearing impaired.

hi collides with the Hindi language abbreviation. hi by itself will resolve as a Hindi language track, while hi in conjunction with another language identifier (such as will use the other language and tag it as hearing impaired.

Flags are ignored on containers with more than one stream.

Any arbitrary text not parsable to a language or flag will be combined and used as the title of the stream (if there is not a stream title already embedded in the file metadata).

Extended example with flags and stream title

/Film (1986)
Film.English Commentary.en.mp3

The last file will parse to an English mp3 audio stream with the title English Commentary.