How to programmatically output fragmented mp4 file using Bento4

bento4Bento4 is an open source project that allows you to read and write MP4 files and related formats. It supports various codecs, DRM systems, encryption schemes, and features such asI want to output fragmented mp4 file format for live streaming. So, how to write a fragmented mp4 file programmatically using Bento4?