I have an episode that is split into two parts. Plex is able to see that the episode consists of two parts, but it’s still only able to play the first part.
Part 1: Lost - S01E24 - Exodus (2) - pt1 Bluray-1080p
Part 2: Lost - S01E24 - Exodus (2) - pt2 Bluray-1080p
Let’s stick with the actual naming conventions, when sharing examples…
As for the OPs initial question:
the “-pt1” suffix should be the very last segment of your file name – get rid of all the other crap… that’ll only get Plex confused.
The added quality information is definitely throwing Plex off.
Have you simply removed the quality section or did you subsequently perform a Plex Dance to make Plex actually reconsider the context of the files?
remove both files form the Plex library folder
scan library files for updates
clear trash / clean bundles
return the files with correct names (nothing after the section identification part)
Q1: does the file show in Plex Web with a little blue-ish box over the poster showing the number 2 like in the example below? This would imply Plex considers those files 2 separate versions of the same video (instead of 2 parts).
Q2: what client do you use when you try to play it back?
Q3: have you verified the files are structured the same way (same # and type of streams, same sequence)? The above screenshots only show parts of that – you can see the full details in Get Info > Display XML.
So I deleted part 2, scanned library, emprtied trash. Then copied part 1 and renamed it as part 2 and scanned library again.
However it still does not play part 2 even though it is now identical to part 1.
To answer your previous questions. The blue ‘2’ does not show up and I am using the Plex Desktop client on Windows 10. I’m guessing you won’t be needing the XML since the files are now identical.