RIFF Multimedia Movie

RIFF Multimedia Movie (also called RIFF RMMP, MMM movie, etc.) is a RIFF-based video/animation file format. It is perhaps a predecessor of AVI.

Discussion
RIFF RMMP is listed in the original RIFF specification, with the apparently-false claim that it will be described later in the document.

"MMM" is sometimes said to stand for Microsoft Multimedia Movie, be we could not confirm this.

Many sources claim the format is associated with MacroMind Director 3.x (an ancestor of Adobe Director), and that "MMM" stands for MacroMind Multimedia Movie. Director did have an .MMM format, but we could not confirm that it is this one, and it would have to be reconciled with the reported release dates of MacroMind Director 3 (1989) and RIFF (1991). Note that these sources often misspell Director as "Directory".

Some sources imply there are two distinct "MMM" formats, though that isn't really consistent with those that say "RIFF RMMP" is a MacroMind format.

Identification
Files begin with "RIFF", and have "RMMP" at offset 8.

Sample files

 * Microsoft Works - Gateway 2000 Edition (Microsoft) (1991) (CD image from archive.org) → ISO image → *.MMM

Links

 * Original RIFF specification
 * filext.com .MMM page - Lists two MMM formats
 * MacroMind