Anyone who knows how to do this with any software, input would be appreciated!
i've tried a product support MKV format, this program seems that developed by a new company in this industry, but during the trial period, it is very stable. i have ever used imtoo MPEG ENCODER and winavi video converter to try to convert the very large video files, but these two software crashed, beyond my imaginle the OJOsoft total video converter can complete the task perfectly.
at begining, i try this program just the same as you that i need to convert MKV format.
well, hope it can solve your problem. by the way, give u the url of the product or you can just google it by enteringthe name:
http://www.ojosoft.com/video-converters/total-video-converter.html 