MPEG-4 is a highly versatile, multi-part multimedia standard (ISO/IEC 14496) developed by the Moving Picture Experts Group (MPEG). It defines how digital audio, video, and interactive 3D graphics are compressed, synchronized, and wrapped inside container formats.
The primary components, system defaults, and file formats that form the core of the MPEG-4 standard operate according to a specific breakdown of parts and defaults. Understanding the Codec vs. Container Distinction
A frequent point of confusion is the difference between MPEG-4 and MP4.
MPEG-4 is the overarching compression standard (the algorithm that shrinks data).
MP4 is a container format (the digital wrapper that holds the compressed video, audio, subtitles, and metadata together). Core MPEG-4 Codec Formats (The “Parts”)
The MPEG-4 standard is divided into architectural layers called “Parts,” each defining specific video or audio compression rules: trac.ffmpeg.org Encode/MPEG-4 – FFmpeg Wiki
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