What is MKV?
.mkv is a filename extension for the Matroska video format
The simple steps to convert WMV to MKV:
1. Run FlashRip 2.0 after installing it.
2. Select the WMV file from local disk and click “Files ->
Select local file to convert” button to add .wmv file.
3. Click “Settings” button,
and switch from tab “General” to “Convert” to choose output
4. Check “Convert to below format” and choose the output
format MKV from pull-down manu.
5. Right-click the selected .wmv file on FlashRip list, click
“convert selected files”, after that the conversion will be