4Videosoft iPhone 4S Video Converter is best Video to iPhone 4S Converter for iPhone 4S users to convert any popular video formats to iPhone 4S compatible video and audio formats, such as MP4, AVI, MOV, MP3, WAV, M4A, etc. It also can be used to convert between audio files. This iPhone 4S Video Converter provides you with powerful editing functions for you to optimize your video effect. You can adjust video Brightness, Contrast, Saturation and Aspect Ratio, trim video clips from the original video, merge several video chapters into one, add watermark, and even take snapshot of your favorite images. Now it has 6X faster conversion speed with NVIDIA CUDA and AMD APP technology. Key Features: 1.Professional Video to iPhone 4S Converter 4Videosoft iPhone 4S Video Converter helps you convert all mainstream video files to iPhone 4S, including MP4, AVI, MOV, VOB, MPEG, and even HD videos. You are allowed to extract audios from video to AAC, AIFF, MP3, M4A, WMA, etc. With this Video Converter for iPhone 4S users, you can catch your favorite images from the source video when you preview. These pictures will be saved as JPEG, BMP or GIF formats. 2.Versatile Video Editing Functions With 4Videosoft iPhone 4S Video Converter, you can perfect your video effect by adjusting its Brightness, Contrast and Saturation. Check "Deinterlacing" to eliminate some jaggedness. You can clip any time-length video from the source video by setting the exact start and end time. You can also merge several separated video chapters into one file for you to watch them successively. You can change the video aspect ratio and cut off the unwanted part to get the perfect play screen for your iPhone 4S and other iphone products. As you like, you can add text or picture watermark for your video with 4Videosoft iPhone 4S Video Converter's help. The position and transparence of watermark can be changed.