Ut Video Codec Suite 21.3.1

This VfW codec is fast, and its performance is better even than Huffyuv, the multithreading version.

Ut Video Codec can be used to encode with x264 and its developers intend to update it until its performance will be comparable with that of Lagarith Codec.

In the meantime, Ut Video Codec Suite remains a good quality program, providing realtime high definition capture with Core 2 Duo class CPU.

The FOURCCs used by Ut Video are ULRA, UMRA, ULRG, UMRG, ULH4, ULH2, ULY0, ULY2, ULY4, UMY4, UMY2, UMH4, UMH2, ULH0, UQRA, UQRG and UQY2. Due to its assembly language and multithreading feature, this codec is fast enough to perform realtime high definition capture.

In terms of compression ratio, it works better than Huffyuv for progressive sources and worse than HuffYUV with interlace sources having a height greater than 288 pixels.

This codec allows you to use AviSynth scripts as input and to edit video files with ConvertToYV12 and to make x264 input the video by “AviSource” of a new AviSynth script.

Moreover, you can save the file at VirtualdubMod with Ut Video Codec YUV420 (ULY0) on the setting of your numbers of CPU cores and “predict left” for decode preference. Use “predict median” for compression-ratio preference.

Ut Video Codec Suite is still being tested and it may have several bugs.

For instance, ULY0 (YUV420) does not support interlaced videos, which means that when concerting RGB to YUV420, the video is mistakenly considered progressive. Also, EDIUS crashes when videos are placed on the timelines or when the video on the timeline starts playing.

Ut Video Codec Suite is a promising codec which is continually being improved. This application is very likely to provide better performance and to produce results comparable with the most popular codecs.