AVI Trimmer + MKV is a free video editor for fast and lossless AVI and MKV editing. This freeware AVI editor is small, smart, easy to use and involves no encoding/decoding processes. No video / audio degradation and out of sync problem arises after editing. All AVI and MKV file types of any size and video / audio content are supported.With AVI Trimmer + MKV you can do the following things: Edit movie for YouTube. Get rid of TV tips in your AVI. Cut or edit out any AVI part you want to. Remove audio stream form AVI file.