From mkv to vob - How to convert a matroska file to dvd in Linux Fedora

• add the rmp fusion repository. here a simple tutorial to do it.
• as root install avidemux, and some other useful software: yum install avidemux lame gstreamer-plugins-bad gstreamer-plugins-ugly dvdauthor

• launch Avidemux: you 'll find a shortcut to Avidemux in your Application Menu -> Sound & Video
  
• open your .mkv file. choose "NO" at this message
  
  
• choose "YES" at this message
  
  
• Select Auto -> DVD and click "OK"
• Select File -> Save -> Save Video... and save it as your_file_name_here.mpeg
• at the end of the task, create a new xml file with this structure (obviously you have to replace the filename with your mpeg filename) and save it as movie.xml:
  
  <dvdauthor>
  <vmgm>
  </vmgm>
  <titleset>
  <titles>
  <pgc>
  <vob file="filename.mpeg" />
  </pgc>
  </titles>
  </titleset>
  </dvdauthor>
  
  
• in your terminal move to the folder where you saved the mpeg file
• not as root dvdauthor -o outputfolder -x movie.xml
• in outputfolder you'll find AUDIO_TS and VIDEO_TS with the vob files ready to be burned