River Past Video Perspective

River Past Video Perspective adjust video aspect ratio with letter box (black strips are added) or pan & scan (the original video is slided), and converts video from 3GPP/3GPP2, ASF, AVI, DAT(VCD), DivX, DV, FLC/FLI, Matroska MKV, QuickTime MOV, MP4, MPEG-1, OGG Media OGM, RealMedia RM/RAM, WMV, and Xvid to AVI, WMV, DivX, XviD, DV, MKV, or OGM. Control over video and/or audio codecs, video quality, size, frame rate, audio sample rate, channel, and bitrate.