# MacroMind Multimedia Movie or Microsoft Multimedia Movie — file signature 52 49 46 46 ?? ?? ?? ?? 52 4d 4d 50 at offset 0

For MacroMind Multimedia Movie or Microsoft Multimedia Movie, hex signature is 52 49 46 46 ?? ?? ?? ?? 52 4d 4d 50; offset is 0; extension is mmm, verified against its source on 2026-09-22.

- **Hex signature:** 52 49 46 46 ?? ?? ?? ?? 52 4d 4d 50 _(verified: appears in the quote below)_
- **Offset:** 0 _(verified: appears in the quote below)_
- **Extension:** mmm _(verified: appears in the quote below)_
- **Format:** MacroMind Multimedia Movie or Microsoft Multimedia Movie _(verified: appears in the quote below)_

## What the source says

> 52 49 46 46 ?? ?? ?? ?? 52 4d 4d 50 | RIFF????RMMP | 0 | mmm | MacroMind Multimedia Movie or Microsoft Multimedia Movie |

## Source

- https://en.wikipedia.org/wiki/List_of_file_signatures

Last verified: 2026-09-22. Review by: 2027-09-22.
Part of [File format magic numbers](https://referencesource.org/file-format-signatures/).