bento4Bento4 is a C++ class library and tools desned to read and write ISO-MP4 files. This format is defined in international specifications ISOIEC 14496-12, 14496-14 and 14496-15. The formatBento4 MP4 SDK · Table of contents · Menu · Table of contents · Get in touch. Submit feedback about this site to: helpdocs@. © documentation.help.