# Audio Video Interleave video format — file signature 52 49 46 46 ?? ?? ?? ?? 41 56 49 20 at offset 0

For Audio Video Interleave video format, hex signature is 52 49 46 46 ?? ?? ?? ?? 41 56 49 20; offset is 0; extension is avi, verified against its source on 2026-09-22.

- **Hex signature:** 52 49 46 46 ?? ?? ?? ?? 41 56 49 20 _(verified: appears in the quote below)_
- **Offset:** 0 _(verified: appears in the quote below)_
- **Extension:** avi _(verified: appears in the quote below)_
- **Format:** Audio Video Interleave video format _(verified: appears in the quote below)_

## What the source says

> 52 49 46 46 ?? ?? ?? ?? 41 56 49 20 | RIFF????AVI␠ | 0 | avi | Audio Video Interleave video format [39] |

## 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/).