avi

.avi — Audio Video Interleave

Microsoft · 1992

Developer

Microsoft

What is a .avi file?

The AVI (Audio Video Interleave) file format is a multimedia container introduced by Microsoft in 1992 as part of its Video for Windows technology. It is one of the oldest and most widely recognized video formats, capable of storing both audio and video data in a single file. AVI files are commonly used for standard definition video playback, although they can support various codecs and resolutions.

Programs That Open .avi Files

Platform	Program
Windows	VLC Media Player	Free	Official
	Windows Media Player	Free	Official
	PotPlayer	Free
macOS	VLC Media Player	Free	Official
	QuickTime Player	Free	Official
	MPlayerX	Free

Common Problems with .avi Files

⚠️ Missing Codec Error when trying to play an AVI file.

This typically means the necessary audio or video codec used to compress the AVI file is not installed on your system. Install a codec pack (like K-Lite Codec Pack) or use a universal media player (like VLC) that has built-in codec support.

⚠️ AVI file appears corrupted or plays with glitches.

The file might be partially downloaded, truly corrupted, or encoded with an unusual codec. Try re-downloading the file, or use a video repair tool if corruption is suspected. Sometimes converting it to another format can fix minor issues.

⚠️ Large file size for AVI videos.

AVI files often use less efficient compression or older codecs, leading to larger file sizes compared to modern formats like MP4. Convert the AVI file to a more compressed format (e.g., MP4 using H.264) using a video converter if file size is a concern.

Frequently Asked Questions

What is an AVI file?▼

An AVI file is a standard multimedia container format used to store video and audio data. It was developed by Microsoft and is widely supported by various media players and devices.

How do I play AVI files?▼

You can play AVI files using popular media players such as VLC Media Player, Windows Media Player, PotPlayer, or DivX Player. Ensure you have the necessary codecs installed if your player doesn't include them.

Can AVI files contain viruses?▼

While an AVI file itself is just a container, it can potentially be used to deliver malicious code, especially if it's a corrupted or specially crafted file. Always download AVI files from trusted sources and scan them with antivirus software.

Technical Details

AVI files are based on the Resource Interchange File Format (RIFF), which divides a file's data into blocks, or "chunks." Inside an AVI file, audio and video streams are interleaved, meaning they are stored in alternating chunks, allowing for synchronized playback. While flexible in terms of codecs, the AVI format itself doesn't inherently define a specific compression method.

Did You Know?

AVI was one of the first multimedia container formats to gain widespread adoption on the Microsoft Windows platform, paving the way for desktop video playback.

Security Information

AVI files are generally safe containers, but like any executable or media file, they can be exploited. Malicious actors might embed harmful code or craft files to exploit vulnerabilities in media players. Always exercise caution when opening AVI files from unknown or untrusted sources, and ensure your media player and antivirus software are up to date.