Aviosoft 3GP video converter converts all popular video formats to 3GP at highest speed, providing best quality and letting you view them on your 3G mobile phones. Formats supported as input include: RM, RMVB, AVI, WMV, ASF, MPG, MPEG, MPE, M1V, MPV2, MP4, DAT, 3GP, FLV, MOV, VOB etc. Before conversion we can use 3GP video converter to edit video, including trim video clips, crop video frame, merge multiple videos into one, add watermark and subtitle. You can also use this program to download YouTube or Yahoo videos and then convert to 3GP formats. I addition it supports creating photos slideshow and then converting them to 3GP for playback.