From Tanbee Studio:
MKV stands for Matroska video. The Matroska Multimedia Container format is similar to .AVI and .MOV that supports several types of video compression and video codecs. MKV is intended to serve as a universal format for storing common multimedia content, like movies or TV shows. Matroska file types are .MKV for video (with subtitles and audio), .MKA for audio-only files and .MKS for subtitles only. The most common use of .MKV files are used to store HD video files. Tanbee MKV Converter is a professional video converter for MKV conversion. Almost all popular video files are supported, like AVI, MP4, WMV, 3GP, MOV, MPEG1, MPEG 2, MPEG 4, DV, SWF, FLV, etc. You can even convert MKV files to desired video formats compatible for iPod, iPhone, Apple TV, Zune, PSP, Mobile Phone. Besides, MKV Converter allows you convert any videos to AAC, AC3, AIFF, AMR, FLAC, M4A, MKA, MP2, MP3, WAV, and WMA audio. Tanbee MKV Converter packs more editing features into an intuitive interface, such as video trim, movie cropping and video effects adjustment. You can customize the video encoding parameters like resolution, frame rate, encoder, bit rate, sample rate, channel, volume, brightness, contrast, saturation to obtain high quality video files.