FLAC with cuesheet support for Plex.
The Plex Media Server directory includes the Scanner for parsing cue sheets for the FLAC files. It will create Plex albums for the cue sheets with the full album available as track -1 and also the split up tracks. The tracks give Plex filenames with "/flaccue/{FLAC file name}.{start_time}.{end_time}". This causes each track to have a unique filename (seemingly necessary) and also provides the track timing information. The "/flaccue" portion indicates to the file system to access the FUSE filesystem for extracting the tracks.
My FLAC files also include "Disc 1", "Disc 2", and similar as the final part of the title for multi-disk sets. Something like: "Artist - Album Title Disc 3.flac" The scanner is also designed to pull disc information from this and to group albums together.
The file "flaccue.py" is a FUSE filesystem that allows accessing tracks include the FLAC files. This is a python script that requires the mirrored directory ('/') and the mount location ('/flaccue') as parameters. You can access any portion of a FLAC file through this filesystem--I've also used it to extract specific song subportions out of the FLAC file for burning onto CDs. You just provide the appropriate start and end times in the filename. Note that FLAC times are specified in cue sheets as MM:SS:FF where MM is minutes, SS is seconds, and FF is frame information (1/75th of a second) and this is the format FLACCue understands.
You do not want to run this script as root as this will give anyone read access to any file. Use something like this instead: sudo --user=plex nohup flaccue.py / /flaccue/ &
As my Plex server runs on a Synology webserver, I've also created a Synology package to run the FLACCue script automatically. The source for creating this package can be found in the synology_package directory. You can compile this with pkgscripts from Synology: https://github.com/SynologyOpenSource/pkgscripts-ng
After creating the toolkit, you put the FLACCue folder in the "toolkit/source" directory and run this command from the "toolkit/" directory: sudo pkgscripts/PkgCreate.py -S -c FLACCue
Note that the python script is called "FLACCue" in this package instead of flaccue.py. The files are the same other than the name. I also installed FFMPEG and Python3 through the Package Center--they are needed for the code to run.
I've also included an unsigned spk file you can install directly at your own risk in the synology_package directory.