I wish I could rip the heart out of the chest of these filler maekrs then rip of there head and then shove it up the hole in the chest and kick them away “FATALITY” X( Note: WARNING! Too much Mortal Kombat is hazardous for ur enraged or frustrated thinking. 
All I see is that MKV files are way more trouble then they are worth. Why on earth use a file format that is not supported by a majority of the existing programs and requires specialized programs to try and extract the video which then puts you in a position of having to use VDub to put it all back together again. Ridicules.
Rename the files from .mkv to .avi
Ex.
Movie1.mkv >Right click > Rename > Movie1.avi
converting mkv to avi xvid without losing quality & same MB file size