Here, I am very happy to share this guide with more friends who MKV (Matroska Video) to AVI format with MKV Converter want. Definition MKV: Matroska MKV stands for video, Matroska is the extensible open standard Audio / Video container format MKV (Matroska Video) video format is entirely free. Specifically, it is a container can contain video (DivX, Xvid, RV9, etc), sound (MP3, MP2, AC3, OGG, AAC, DTS, PCM) and subtitle (SRT, ASS, SSA, USF, etc) in the same file. For more information just click the link, and you will find it there.