: It provides a specific set of procedures and test sequences to verify that bitstreams (video/audio data) and decoders meet official requirements.
: MP4 files can store images, subtitles, and chapter markers directly within the container. 38184mp4
: It is the most widely supported format for streaming on platforms like YouTube and viewing on mobile devices. : It provides a specific set of procedures
If you are actually referring to a generic , the most "useful features" include: the most "useful features" include: