| UT Video Codec Suite | |
|---|---|
| Original author | Takeshi Umezawa |
| Initial release | April 18, 2008; 17 years ago (2008-04-18) |
| Stable release | 23.2.0 / June 6, 2025; 8 months ago (2025-06-06) |
| Written in | C++ |
| Operating system | Windows,OS X |
| Size | 7.38MB |
| Type | Video Codec |
| License | GPL |
| Website | umezawa |
| Repository | |
UT Video Codec Suite is a fast,losslessvideo codec, developed by Takeshi Umezawa (梅澤 威志,Umezawa Takeshi) and released under the freeGNU General Public License. The algorithm of UT video is based on theHuffman code.
UT video was developed as an alternative toHuffYUV, in order to achieve better compression. It can handlecolor spaces such asYUV422 (ULY2),RGB (ULRG),RGBA (ULRA) and, most recently, YUV420 (ULY0).
It has bothx86 andx64 builds. Due to itsmultithreading support, this codec is also capable of encodingHDTV material in real time. The codec requires support for theSSE2 instruction set because it is heavily used for speed optimizations.[1][2]
UT video uses the followingFOURCC codes:ULY0,ULY2,ULRA,ULRG.[3]
It is used in the screen recording softwareOBS Studio when set to "Lossless" video quality.
 | This article about television technology is astub. You can help Wikipedia byadding missing information. |
