Aiseesoft MKV Converter enables you to convert MKV and any other video/audio files to all popular video and audio formats. It also possesses a wide range of video editing functions. You can merge video files together, crop the video playing area, add video watermark, even modify video effect. Moreover, it will bring you much faster converting speed with AMD APP and NVIDIA CUDA technology, and it can also support 5.1 channel audio after upgraded.