Level 2
If you looking for fastest video converter, you should try this one Movavi Video Converter
for example Movavi VS Xilisoft speed comparison you can check from here

Yesterday try to convert some mkv to mp4 because the sound codec not compatible with my old Popcorn hour A300,
There few mkv files i test with Xilisoft shows estimate 50 minutes+ and sometimes more than hour, but with Movavi its take only 3 minutes.

this comparison posted on winxdvd site

Just sharing, in case you need to convert something,.:emoji_v:
You can get Movavi from here