What's MKV?
MKV is a common video file defined by Matroska Media, a new multimedia package format. It is a container like MOV and AVI, providing support for a huge number of different video, audio and subtitles compression formats. It is not really intended for media content distribution on a large scale, but is achieving it anyway. The feature of MKV is that it could hold many types of encoded video, audio and subtitles stream. That may be the reason why you want to convert AVI to MKV.
Download Video Converter, install and run it. With AVI to MKV Converter you can convert AVI to MKV files efficiently with great picture quality. You can rely on the professional AVI to MKV Ripper to convert AVI to MKV quickly.
If you are Mac users, please download Mac Video Converter!
Step 1: Add the files
Launch the software and then click "Browse..." button to import your AVI files in the software.

Step 2: Change the previous settings of AVI to MKV Converter
Click "To MKV" button to specify the output file format.

Step 3: Start to convert AVI to MKV
Click "Convert Now!" button on the right corner at the bottom.
Related Links: How to Convert VOB to AVI, How to Convert FLV to AVI, How to Convert 3GP to AVI