How to open MPEG-4 video file format .mpg4 files
Have you had trouble opening the mpg4 file on your computer? What are mpg4 files? We explain what they are and recommend software that we know will open them.
What is mpg4 file?
An mpg4 file extension is used for multimedia container file format that stores MPEG-4 encoded video and Advanced Audio Coding (AAC)-encoded audio content.
MPEG-4 video file format description
The mpg4 file extension is associated with MPEG-4 multimedia file format. MPEG-4 is an International Standards Organization (ISO) specification that covers many aspects of multimedia presentation including compression, authoring and delivery.
The MPEG-4 file format, as defined by the MPEG-4 specification, contains MPEG-4 encoded video and Advanced Audio Coding (AAC)-encoded audio content.
MPG4 is a container format. As any other container format like AVI (avi), RealMedia (rm, rmvb), QuickTime (mov), MPEG (mpg, mpeg), Matroska (mkv, mka), OGM (ogm) it allows you to combine different multimedia streams (mostly audio and video) into one single file.
MIME types:
video/mp4
Suggested software to open mpg4 file

VLC media player
One of the most popular multi-platfom multimeda player