Key functions: 1. 4Videosoft TRP Video Converter supports all the video and audio formats, including MP4, FLV, AVI, ASF, WMV, 3GP, MOV, M4V, MPG, WMV. 2. With this TRP Video Converter, you can extract dialogue or background music from video files and convert to MP3/MP2/WAV audio file. 3. With this software, you are able to enjoy these videos on your players like like iPhone, iPad, iPod, Samsung Galaxy Note/S6, LG, HTC, Motorola, BlackBerry, Nokia. 4. You are available to set output video Brightness, Contrast, Saturation and audio volume and even switch the interlacing video to progressive video for much clearer video quality. 5. Specify a certain segment to convert by setting the start time and end time precisely or dragging the slide bar visually. Click "Crop" to customize the video play region to get the perfect effect for your player's screen or select the output aspect ratio. Its Merging feature helps you to join these several chapters into one video for successive watching.