Which program Hunting use to convert MP4

I using now Cyberlink PowerDirector.
jYKRB/nIW$w When I try use this program to convert MP4 , the size is about 200 MB or  1.2 GB and up.
`\R4Xd*P Cant choose the size like hunting.o:H"dt y"P
So I want know which program you guys use to convert.
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thanks