From Free Video Cutter Team:
MKV to VOB Converter is an all-in-one VOB Converter. It can convert MKV to DVD VOB File (MPEG-2 PS format). Support PAL VOB and NTSC VOB. Converting in batches, convert multiple files at one time. Automatically shutdown the computer after conversion. Many settings are adjustable, such as video size, bit rate, frame rate.