A collection's content is dumped to a JSON (preferably the same as the mbdlist format - see below).
{
"movies": [
{
"id": 845781,
"rank": 1,
"adult": 0,
"title": "Red One",
"imdb_id": "tt14948432",
"tvdb_id": null,
"language": "en",
"mediatype": "movie",
"release_year": 2024,
"spoken_language": "en"
},
{
"id": 912649,
"rank": 2,
"adult": 0,
"title": "Venom: The Last Dance",
"imdb_id": "tt16366836",
"tvdb_id": null,
"language": "en",
"mediatype": "movie",
"release_year": 2024,
"spoken_language": "en"
}
],
"shows": []
}
These JSON files can be used to create collections in Jellyfin with the aid of a third-party tool.