There are 2 file types use the .M21 file extension:
1. AXMEDIS MPEG-21 File
- Developer AXMEDIS
-
Popularity
3.3 (4 votes)
- Category Video Files
- Format N/A
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.
| Software's name | License | Platforms |
|---|---|---|
AXMEDIS Editor |
 |
|
|
AXMEDIS Player |
|
Updated: January 4, 2009
2. MPEG-21 File
- Developer N/A
-
Popularity
3.0 (1 votes)
- Category Video Files
- Format N/A
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.
| Software's name | License | Platforms |
|---|---|---|
Apple QuickTime Player |
Freeware |   |
Updated: March 27, 2008