4Videosoft Mac iPhone 4S Video Converter

4Videosoft iPhone 4S Video Converter is specially designed for iPhone 4S users to convert video files to iPhone 4S video on Mac OS. It can be used to convert any mainstream video formats to iPhone 4S video MP4, AVI, etc and MP3, M4A audio. It can also be used to edit iPhone 4S video before converting. Trim video length, crop video frame, modify video effect, merge video chapters and add video watermark are all can be operated with it.