The internal structure of an MP4 file is organized into a hierarchy of "boxes" or "atoms". MP4 files explained: How to open and use - Adobe
: It is arguably the most portable video format, natively supported by smartphones, web browsers (via HTML5), and diverse media players like VLC Media Player . Technical Architecture RTS0805 mp4
: An MP4 file can simultaneously hold video and audio streams, still images, and metadata like subtitles or chapter information. The internal structure of an MP4 file is