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.M21 File Extension2 File Associations
Run a free scan for .M21 file extension errors.
| File Type 1 |
MPEG-21 File (Most common) |
| Category |
Video Files |
| Common? |
No |
| File Description |
Multimedia file format developed by the Moving Picture Experts Group (MPEG); uses a "meta-box" format that contains time-based media, such as audio and video data, as well as metadata that describes the contents of the file.
MPEG-21 may also include DRM information for copy-protection. |
| Program(s) that open m21 files |
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Mac OS |
 Apple QuickTime Player |
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Windows |
Apple QuickTime Player |
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| Sponsored Links |
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| Updated 11/7/07 |
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| File Type 2 |
AXMEDIS MPEG-21 File |
| Category |
Video Files |
| Common? |
No |
| File Description |
Media file created with the AXMEDIS Editor; saved in a packaged content distribution format and may contain multiple types of media; may also include descriptive metadata, and DRM copy-protection information.
AXMEDIS MPEG-21 files may also be saved with an .MP21 file extension. |
| Program(s) that open m21 files |
|
Windows |
AXMEDIS Editor
AXMEDIS Player |
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| Sponsored Links |
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| Updated 9/22/08 |
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