Home : File Types : U File (3 File Associations)

.U File Extension

File Type 1Unreal Tournament Class Package

DeveloperEpic Games
Popularity
4.1 (15 Votes)
CategoryGame Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

What is a U file?

Contains settings used by Unreal Tournament; stored within the Unreal System directory, i.e. "\Unreal\System\Engine.u;" may be replaced with custom class packages.

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Programs that open U files
Windows
Epic Games Unreal Tournament
Epic Games UnrealEd
Dragon UnPACKer
Unreal Tournament Package Tool
Mac
Epic Games Unreal Tournament
Updated 3/5/2012

File Type 2AU Audio File

DeveloperN/A
Popularity
3.2 (5 Votes)
CategoryAudio Files
FormatN/A

Unknown

File format categories include Binary, Text, XML, and Zip. The format of this file type has not been determined.

.U File Association 2

Audio container format typically used to store ?-law encoded audio data; introduced by Sun Microsystems and also used by MusicKit for the NeXT operating system; contains a header that includes six 32-bit words, an optional information section, then the audio data.

More Information

AU files typically use the .AU extension.

Programs that open U files
Windows
Apple QuickTime Player
Microsoft Windows Media Player
RealNetworks RealPlayer Cloud
Mac
Apple QuickTime Player
RealNetworks RealPlayer Cloud
Updated 3/27/2014

File Type 3Subsampled Raw YUV Image

DeveloperN/A
Popularity
1.0 (3 Votes)
CategoryRaster Image Files
FormatBinary

Binary

This file is saved in a binary format, which requires a specific program to read its contents.

.U File Association 3

Subsampled "U" image created by ppmtoyuvsplit, a Unix-based command-line utility that splits .PPM files into .Y, U, and .V files; contains the "U" chrominance, or color, component for the image; used for storing image data in a format required by the Stanford MPEG codec.

More Information

Y, U, and V files can be built back into their original PPM file using the yuvsplittoppm utility.

NOTE: The ppmtoyuvsplit and yuvsplittoppm programs are part of netpbm, a Unix-based graphics package.

Programs that open U files
Windows
Microsoft Windows Media Player with YUV Genius package
Apple QuickTime Player with QuickTime YUV codec
Mac
Apple QuickTime Player with QuickTime YUV codec
Linux
ppmtoyuvsplit
yuvsplittoppm
Updated 5/26/2010

About this page

Our goal is to help you understand what a file with a *.u suffix is and how to open it.

All file types, file format descriptions, and Mac and Windows programs listed on this page have been individually researched and verified by the FileInfo team. We strive for 100% accuracy and do not publish any information we have not been able to verify.

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