.U File Extension

.U File Extension

File Type 1

Unreal Tournament Class Package

Developer Epic Games
Popularity
3.7  |  30 Votes
Category Game Files
Format Binary

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

Updated March 5, 2012
File Type 2

AU Audio File

Developer N/A
Popularity
3.3  |  9 Votes
Category Audio Files
Format N/A

What is a U file?

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
Included with OS
Mac
Included with OS
Updated March 27, 2014
File Type 3

Subsampled Raw YUV Image

Developer N/A
Popularity
2.7  |  7 Votes
Category Raster Image Files
Format Binary

What is a U file?

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

Updated May 26, 2010

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