What is the difference between .m4b and .mp4?
- Extension
 - .m4b
 - .mp4
 
- Format
 - Binary
 - Binary
 
- Category
 - Audio
 - Video
 
- Developer
 - Apple
 - Moving Picture Experts Group
 
- Description
 - It is an audiobook file compressed using .AAC algorithm based on MPEG-4 container format. It is similar to .M4A file but its denoted as an audiobook and supporting audio players can bookmark it.
 - An MP4 file is a multimedia file commonly used to store a movie or video clip, but may also contain subtitles or images. MP4 is short for MPEG-4 Part 14, which is a container format based on the QuickTime File Format (QTFF) used by .MOV and .QT files.
 
- MIME Type
 - audio/x-m4a
 - video/mp4
 
- Sample
 - sample.m4b
 - sample.mp4
 
- Wikipedia
 - .m4b on Wikipedia
 - .mp4 on Wikipedia