Convert video From avi to mkv

An AVI file is a video file saved in the Audio Video Interleave (AVI) multimedia container format created by Microsoft. It stores video and audio data encoded in various codecs, including DivX and XviD. Information from <a href='https://fileinfo.com'>FileInfo - The File Extensions Database</a>.

MKV file extension is a Matroska Video file. It's a video container much like MOV and AVI, but also supports an unlimited number of audio, picture, and subtitle tracks (like SRT or USF).