Ut Video Codec Suite

UT Video Codec Suite
Original author(s)Takeshi Umezawa
Initial releaseApril 18, 2008; 16 years ago (2008-04-18)
Stable release
23.1.0 / April 23, 2023; 20 months ago (2023-04-23)
Repository
Written inC++
Operating systemWindows, OS X
Size7.02 MB
TypeVideo Codec
LicenseGPL
Websiteumezawa.dyndns.info/wordpress/

UT Video Codec Suite is a fast, lossless video codec, developed by Takeshi Umezawa (梅澤 威志, Umezawa Takeshi) and released under the free GNU General Public License. The algorithm of UT video is based on the Huffman code.

UT video was developed as an alternative to HuffYUV, in order to achieve better compression. It can handle color spaces such as YUV422 (ULY2), RGB (ULRG), RGBA (ULRA) and, most recently, YUV420 (ULY0).

It has both x86 and x64 builds. Due to its multithreading support, this codec is also capable of encoding HDTV material in real time. The codec requires support for the SSE2 instruction set because it is heavily used for speed optimizations.[1][2]

UT video uses the following FOURCC codes: ULY0, ULY2, ULRA, ULRG.[3]

It is used in the screen recording software OBS Studio when set to "Lossless" video quality.

References

  1. ^ "#534 (Ut Video Support) – FFmpeg". ffmpeg.org. Retrieved March 22, 2017.
  2. ^ "Ut Video Codec Suite - a new lossless video codec for Windows! - Doom9's Forum". doom9.org. Retrieved March 22, 2017.
  3. ^ free-codecs.com (12 Mar 2017). "Ut Video Codec Suite". free-codecs.com. Retrieved March 22, 2017.


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