bento4Bento4 is an open source project that provides a portable C++ class library and tools for parsing and creating various types of media files, such as MP4, iTunes, Quicktime,Bento4 is a fast, modern, and cross-platform library and tools for reading and writing ISO-MP4 files and related formats. It supports H.264, H.265, AAC, Dolby Vision, DRM, and more