MP4, also known as MPEG-4 Part 14, is a digital multimedia container format most commonly used to store video and audio files. It has become the standard format for online video streaming and sharing, ...
(1) A handheld device that plays video in the MPEG-4 movie file format. See MP4 and portable video player. (2) Any media player software or Blu-ray/DVD player that supports the MP4 movie file format.
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