Boilsoft Video Converter converts all popular video formats such as AVI, MOV, MP4, FLV, MPEG, VOB, RM, MP4, WMV, and etc. to AVI, MPEG, VCD, SVCD, DVD, 3GP, iPod Mp4, PSP MP4, MP4, .flv/ flash, WMV. With it, you can preview video before converted, add subtitle, watermark to it, cut a certain video segment, customize output parameters, and convert video by batch. Four ways to adjust output video frame size are Crop, Stretch to fit , Preserve aspect ratio and Customize.