.MP4B File Extension
- Developer by: Apple, Inc.
- Category: Audio and sound Files
What is an .MP4B file?
.MP4B is MPEG-4 Audio Layer bookmarkable data
The mp4b file format is similar to files using m4a file extension.
The difference is however, that the mp4b files can be bookmarked and thus are mostly used for audio books, podcasts and any other audio work.
The default file extension for MPEG-4 Audio Layer bookmarkable file is m4b.