MKV comes from Matroska video, Matroska is the extensible open standard Audio/Video container like avi, mp4, mpg, asf, rm, mov.

MKV TO AVI CONVERTER can convert mkv to avi file. MKV to AVI converter
is also an MKV converter, splitter and editor. It changes the frame
size, frame rate, video compression codec and audio compression codec.
The key features include: Encode AVI with DIVX, XVID, Windows Media
Audio and Video Codec, DV Video Encoder, etc. Split mkv file into
smaller pieces.

Adjust the video aspect ratio. Change video file size with choosing
the different encoding bitrate. Open compression system for video and
audio. Convert other video formats MPEG, MPG, ASF, WMV, VCD, SVCD, DAT
to avi file also.