There are several software that you can convert MKV to DVD. But I
always use MKV to DVD Converter from MKV-to-DVD official site:
http://www.mkv-to-dvd.com . It not only converts MKV to DVD format,
but also burn MKV to DVD. One software get all jobs done. I like it.
You can download this software directly from:
http://www.mkv-to-dvd.com/mkv-to-dvd.html
. Just enjoy it and good luck to you all.