Do you want to join videos into one large file ? Have you tried other programs in order to merge videos of different formats, sizes and aspect ratios and you couldn't ?
CXB DVD To MPEG Converter is excellent DVD ripping tool can fast convert any movie DVD to MPEG-1, MPEG-2, VCD, SVCD format, While the image quality is high, the conversion speed is very fast (up to 600%).
Professional Emicsoft DPG Converter freeware assist NDS users to convert video to DPG format which can be played on portable devices with excellent output quality and fast conversion speed.