The M4B file extension is an MPEG-4 Audio Book file. It’s used by iTunes for audiobooks. I have a ton of audiobooks and would love to access them from anywhere via my plex server. I believe you already support .M4A files for music, so maybe the additional code would be simple to add?
The advantage of the M4B format is the ability to store digital bookmarks, along with the audio, letting you pause playback and then resume later. This is one reason they’re preferred over MP3s, which can’t save your place in the file.
The M4A audio format is basically identical to M4B except that those types of files are used for music instead of audiobooks.
Thank you.
GCLI
