jellyfin.org/docs/general/server/media/_video-multipart.md

Multiple Parts

Content that is split into multiple files can be stacked together if named correctly. Files should be named as follows:

Movie Name (2010)
├── Movie Name-cd1.mkv
├── Movie Name-cd2.mkv
└── Movie Name-cd3.mkv

Show (2025)
└──Season 1
    ├── S01E01-part-1.mkv
    └── S01E01-part-2.mkv

The separator is optional between <parttype> and <partnumber>. <partnumber> can be any number, or the letters a-d.

Supported part types are:

• cd
• dvd
• part
• pt
• disc
• disk

Supported separators are:

• (space)
• . (period)
• - (dash)
• _ (underscore)

This does not work with multiple versions or merging.