“Hi, I just downloaded an AVI format video from the Internet and I want to convert it into MKV format, what do I need and how can I do it?”

Converting AVI to MKV with AVI to MKV converter is feasible with a professional AVI to MKV converter. AVI, short for Audio Video Interleaved, is a multimedia container format developed by Microsoft in 1992 as part of its Video for Windows software. AVI files can contain both audio and video data in a file container that allows synchronous audio-with-video playback. MKV, is an open standard, free container format, a file format that can hold an unlimited number of video files, audio files, pictures, or subtitle tracks in one file. It is intended to serve as a universal format for storing common multimedia content, like movies or TV shows. We talked how to convert MKV to AVI before. Here we show you 5 ways to convert AVI to MKV.

Part 1: Convert AVI to MKV with Leawo Video Converter

Generally speaking, there are two kinds of video converter for you to convert AVI to MKV. One is a desktop converter, and the other is an online converter. Leawo Video Converter is a professional desktop video converting program allowing you to convert video and audio file between 180+ formats. Of course, we can use it to convert AVI to MKV. To be more specific, the formats supported by Leawo Video Converter include Common Video (MP4, H.265 MP4, MKV, H.265 MKV, MOV, etc.), Common Audio (AAC, AC3, WAV, MP3, WMA, FLAC, etc.), HD Video (HD MP4, HD AVI, HD TS, HD VOB, etc.), and 4K Video (4K MP4 and 4K MKV). This professional AVI to MKV converter is equipped with an internal video editor that allows users to trim video length, crop video size, add video watermark, adjust video effect, create 3D video, and remove video noise, and at the same time, the internal video player allows you to play video file after the file is imported. The conversion speed from one format to another format with the help of Leawo Video Converter is extremely fast. As claimed on the official website, the speed is 6 times faster. More amazingly, Leawo Video Converter is able to retain 100% original quality of the source file. You are even allowed to add external subtitles and choose an audio track for keeping in the output video file.

Mac users can turn to the Mac version of Leawo Video Converter for help. Download and install the right version of Leawo Video Converter based on the system of your computer, and follow the guide below to convert AVI to MKV with Leawo Video Converter. Here we take the Windows version of Leawo Video Converter as an example.

Step 1. Import Source AVI Video

Click off the program after installation, and click “Video Converter” on the main interface or click “Convert” tab at the top left menu bar to enter the interface of Leawo Video Converter, where you need to click “Add Video" to choose and add your source AVI video file. Optionally, you can directly drag and drop your source AVI video file into the program. After video file is imported, you can freely choose an audio track and add external subtitle to the output video.

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Step 2. Set Output Video Format

After source AVI video file is imported, to convert it to MKV, you need to set MKV as the output video format. Click the drop-down box named “MP4 Video” by default next to the “Add Photo” button. On the drop-down list, select “Change” option. To convert to MKV, you are required to choose “MKV” as the output video format. Then on the popup Profile window, select “MKV” from “Format” column as output format. Please note that once you change the output format, the name of the drop-down box will change as well.

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Step 3. Edit Video and Audio Parameters

After output video format is set, you will be returned to the main interface, where you need to click “Edit” button on the drop-down profile setting box to edit video and audio parameters including video codec, aspect ratio, frame rate, resolution, audio codec, bit rate, channel, sample rate, etc. After editing job is done, click “OK” to return to the main interface.

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Step 4. Start to Convert AVI to MKV

Click the big green “Convert” button on the sub-menu bar next to the format setting drop-down box. Then, on the popup sidebar, set output directory. After setting output directory, click the “Convert” button right below. Leawo Video Converter would start to convert AVI to MKV.

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Note: Leawo Video Converter is equipped with an internal video editor, which allows users to trim video length, add video watermark, crop video size, adjust video effect, turn 2D video into 3D video, and remove video background noise.

Part 2: Convert AVI to MKV with MKVToolNix

There’s a powerful software application named MKVToolNix. It’s famous for converting all kinds of video format into MKV with different sound tracks and subtitles. It’s capable of adding as many sound tracks and subtitles as you want to the file and it’s worth noting that it’s a free AVI to MKV converter. But it doesn’t support some video formats like WMV and ASF unless you install the specific codec for them. If you install the “asf2mkv recorder” you can basically use it to convert all kinds of video format into MKV, not to mention that you can convert AVI to MKV free.

To know how to convert AVI to MKV while adding external audio tracks and subtitles to the video, please check out the content below:

Step 1. Add Source AVI File
Download and install MKVToolNix. Open it and click “Add source files” to add the source files you want to merge together. If you want to add additional audio tracks and subtitle to the video, add all of the three kinds of files to the app: AVI format video, sound track and subtitle. And you’ll see the files you added on the “Source file” area as well as the “Tracks, chapters, tags and attachments” area, and you can see that the video you input will be separated into two kinds of files: video and audio.

Step 2. Perform Detailed Settings
Click the file in the “Tracks, chapters, tags and attachments” area and you’ll see that the “Properties” area becomes editable. You can adjust parameters of all the three kinds of files in this area. Just click the file in the “Tracks, chapters, tags and attachments” area and the related settings will be available on the “Properties” area. Adjustments include setting the delay time for sound track and subtitle, choosing the default sound track and subtitle for the output MKV, etc.

Step 3. Start to Convert AVI to MKV
After you are done adjusting the parameters, set the output file directory in the “Output file” box and click the “Start muxing” button at the bottom of the interface to start the conversion. There’s a progress bar at the right side of the button.

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Part 3: Convert AVI to MKV with Freemake Video Converter

Thirdly, you can use Freemake to convert AVI video to MKV free and in high quality. The detailed steps to convert AVI video to MKV are nearly the same as that of Leawo Video Converter. Import AVI video to Freemake, choose MKV as video output, and start to convert AVI video to MKV. For details steps, please check the following description.

Step 1. Import AVI Video to Freemake
Download and install Freemake on your computer, kick off Freemake, and click “+Video” button to choose and import source AVI video file. Also, it’s possible to drag and drop multimedia clips into the freeware.

Step 2. Choose MKV Output Video Format
Hit the “to MKV” button on the lower formats bar of the free conversion application to pop up a small window.

Step 3. Convert AVI Video to MKV
Click “Convert” button in the pop-up window to start converting AVI video to MKV. The conversion process may take some time depending on your original file size and length.

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Part 4: Convert AVI to MKV with Online-Convert

The fourth AVI to MKV converter I would introduce here is Online-Convert that lets you convert media easy and fast from one format to another. This online video converter supports a lot of different source formats. Check out the guide below to convert AVI to MKV with Online-Convert.

Step 1. Choose Output Format
Go to the official website of Online-Convert, and go to Audio converter tab. To convert to MKV, you have to choose “Convert to MKV” under the drop-down list, and then click “Go”.

Step 2. Import Source AVI File
Click “Choose Files” to choose and add source AVI file. After AVI file is imported, you can perform optional settings as well.

Step 3. Start to Convert AVI to MKV
Click “Start Conversion” to start converting AVI to MKV. After a while, you can get converted video files in MKV video format, and the you can transfer them to your portable devices or players for easy playback.

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Part 5: Convert AVI to MKV with Convert. Files

Convertfiles.com is an online application that you can use to convert files from AVI to MKV. Using this online video converter, you can be assured that your data is safe and that no their party can gain access. Please note that this free online video converter can process files no more than 250 MB size. If your video file is larger than 250 MB, please choose other video converters.

Step 1. Add Source AVI File
Hit “Browse” button to choose and upload local AVI file. Alternatively, you can enter a link if your AVI video file can be found online.

Step 2. Set MKV as Output Format
Choose and set MKV as the output video format in the Output format drop-down list.

Step 3. Start to Convert AVI to MKV
Click “Convert” button to convert AVI to MKV. After that, a download link will pop up on the screen of your device for you to download converted video file in MKV format. Alternatively, you can choose to send the converted result to your mail box.

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