SOLVED: Missing media in interface

[SurplusGadgets]

Been using the Jellyfin server for almost a year now. Everything pretty much working after transferring from my Plex server of the last 10 years. But noticed that there are still a few movie titles that do not appear.  See attached screen shots.

The Movie library is a dedicated folder structure on a Netgear Readynas server.  All files and folders have and are accessed with the same permissions via CIFS mount of the folder to a dedicated Ubuntu server only running Jellyfin. I also have home movies, home photos, home videos, CDs, etc libraries that the server handles (over 50,000 objects in all).

All the MP4s play fine. From the screenshot shown, there should be 3,645 titles in Jellyfin but the interface only reports 3,588.  Searching for movies with the name "code" in them shows there are 6 titles in the folder structure but only 4 show up in Jellyfin.  Searching the logs, I do not find any indications of problems with any files from a scan. The only real errors are photos with a .tiff extension that Jellyfin does not seem to understand how to handle.

What can I do to debug this further? What are the likely causes?
   

[TheDreadPirate]

Jellyfin does not really use IMDB. TMDB is the default metadata provider. If TMDB doesn't have a IMDB ID to TMDB ID mapping it will rely on searching the name. Additionally, Jellyfin needs ID numbers to be in square brackets and not squiggly brackets.

[tmdbid-######]

For "Code Name Dancer", TMDB has that listed under "Her Secret Life", tmdbid 128382.

https://www.themoviedb.org/movie/128382-her-secret-life

Try switching to TMDB IDs and switch to square brackets.

[SurplusGadgets]

That may explain things.  TMDB has "The Code" as "Thick as Thieves".  Both movies can be found in the interface by these alternate titles (even though the displayed "cover" has the title the same as the file I named). So, technically the movie is there.  Just with a different title. Interesting. So MyMovies.dk database I find via the IMDB title.  But Jellyfin via a different TMDB title.
   
Any idea on how to discover which titles are in the interface by a different name than I supplied?

Searching deeper, I put a few titles in folders with the extras from the DVD. So this explains the "missing" 57 titles I thought might not be there. They are extra files for existing titles.

While the braces to brackets is easy to change, the IMDB to TMDB code change would be a huge undertaking.  My original MyMovies.dk database only has imdb listings.

Wonder how I might find a cross reference of codes and/or titles between the two databases? So I can learn how to find via alternate titles.

[TheDreadPirate]

That is the $64,000 question. Unidentified movies will show up with a different icon in the metadata editor. Mis-identified content is a different story. I'm not aware of a way to find those.

You can use external tools like Tiny Media Manager to mass rename files.

[SurplusGadgets]

oops!