XenonMKV (formerly MKVOfDeath) can repackage high-definition H.264/x264 video and 5.1 audio contained in MKV files. It is a Windows frontend utility, similar to GOTsent and Videora Xbox Converter. It repackages high-definition H.264/x264 video and 5.1 audio contained in MKV files to an MP4 format that the Xbox 360 can play.

This utility was created because the Xbox 360 requires specific video settings, and doing things manually is a huge pain.

Advantages:
1. No video transcoding required. All video is maintained at its original quality.
2. Only the audio is downsampled, so the process is much quicker than a full transcode. The Xbox 360 only supports 2-channel AAC audio with H.264 source. Please write to Microsoft and request enhanced audio support (5.1 AC3, DTS and AAC) as a feature for future dashboard releases.
3. XenonMKV is designed specifically for the Xbox 360 video specifications. There's no worrying about whether you've got the right converter settings.

Of course, there are several disadvantages:
1. You lose the extra 3.1 channels from the original source
2. The Xbox 360 will not play MP4 files over 4GB in size.
3. Windows Media Player 11 is weaksauce when it comes to recognizing filetypes that aren't WMV

Requirements:
* .NET Framework
* Nero AAC encoder

The license of this software is Free, you can free download and free use this video converter software.