As one of the most popular video container formats, the FLV format is widely used to distribute media content like movies or TV shows over the internet. If you download and online streaming video to your local computer, there are great chances that the downloaded video is saved in the FLV format. However, the FLV video format is not supported by all of the media players, meaning that you might not be able to open and play it on your computer or other devices successfully. To make sure that the video can be played, it's suggested that you convert the FLV video file to a more compatible video format like MKV. In case you don't know how to do that, today we are going to introduce some of the best FLV to MKV converter programs for you to convert your FLV videos to MKV easily.

Part 1: Basic Knowledge about FLV and MKV

FLV is short for "Flash Video". It's a video container format using Adobe Flash Player version 6 and newer. As mentioned above, the FLV video format is mostly used to deliver synchronized audio and video streams over the Internet. FLV has great compatibility with the online streaming environment, but by many local media player programs and devices.

MKV, also known as The Matroska Multimedia Container, is a free, open-standard container format that can hold a great number of media content like video, audio, picture, or subtitle tracks in one file. Not only does this media format have a great media containing the ability, it also has great compatibility with most of the media players or devices. So by converting your FLV videos to MKV, you can make the videos available on multiple platforms and player programs. 

Part 2: How to Convert FLV to MKV with Leawo Video Converter

In order to convert your FLV videos to MKV, the most important thing that you should consider is the video converter program. If you want a stable, powerful and user-friendly video converter program to do the job, then I would highly recommend Leawo Video Converter to be your first choice.

Leawo Video Converter is one of the most popular video converter programs in the market. With the powerful media processing ability, Leawo Video Converter is capable of converting more than 180 kinds of video and audio files from one format to another, including FLV to MKV, of course. What's more, thanks to the advanced video converting engine, Leawo Video Converter can retain the very original quality in the entire converting process, and provide a 6 times higher converting speed comparing to most of its counterparts on the market. In addition, there is also a practical video editor module built in, providing various video editing options like trimming, cropping, adjusting parameters, adding watermark, converting 2D video to 3D and removing video background noise.

With the great software design, Leawo Video Converter makes the FLV to MKV converting task easier than ever. Even a total beginner can finish the conversion in minutes after reading a simple guide. Now I'll give you that guide in the following so that you can have a better understanding of this excellent FLV to MKV converter program and how it works. 

Step 1: Import the FLV video

To convert FLV to MKV, you have to first import the source FLV video file into the program. To do that, launch Leawo Video Converter, and then drag your FLV video from its original folder and drop it in the center of the program interface. You can also click the "Add Video" button to locate and import the video.


Step 2: Set output format

Leawo Video Converter has set the "MP4 Video" as the output format by default. To change the output format to MKV, just click the "MP4 Video" area next to the green "Convert" button, choose "Change" in the dropdown menu and then find "MKV Video" under the "Common Video" tab in the pop-out format selection window.


Step 3: Further editing

As mentioned earlier, Leawo Video Converter has a very practical video editor module built in. You can click the "Edit" button and go to the video editing panel to edit the video before you start the conversion. Once you are done editing, click "OK" to apply the adjustments and go back to the main interface to proceed.


Step 4: Start converting

As the final step, click the green "Convert" button, set an output directory and then click the "Convert" icon below to start the FLV to MKV conversion task.


Part 3: How to Convert FLV to MKV with Freemake Video Converter

Like Leawo Video Converter, Freemake Video Converter is also a media converter program that can be used to convert FLV files to MKV. The program supports a variety of media formats as the input and the output, and can provide a lossless converting result for most of the conversion tasks. In addition, it can also directly pull media content from online streaming services and convert them to other formats that fit mobile devices and the desktop. Although Freemake Video Converter is not as powerful as Leawo Video Converter in many ways, it's still loved by many video enthusiasts because of the great ease of use and high efficiency. If you want to convert an FLV video file to MKV with Freemake Video Converter, this is how you do it:


Step 1: Install Freemake Video Converter on your computer and launch it. In the bottom row of the program interface, choose "to MKV".
Step 2: Once you click the "to MKV" button, you will be asked to import a source file. Locate the FLV video file on your computer and import it for conversion.
Step 3: When the source FLV file is imported, designate an output path and then click the "Convert" button to start the conversion.

Part 4. How to Convert FLV to MKV with MediaCoder

MediaCoder is a powerful media processing program with a lot of advanced video and audio encoding options. Because of the rich functionality and the powerful media processing ability, MediaCoder is loved by so many media professionals and video creating practitioners. But don't worry if you are only a beginner, because MediaCoder could also be a handy tool if you simply want to convert a video from one format to another. As long as you are willing to take some time to get used to the user interface, converting FLV to MKV with MediaCoder should not be a hard thing to do. Here is how to convert FLV to MKV fast with MediaCoder.


Step 1: Download, install and launch MediaCoder.
Step 2: Click the "ADD" button in the toolbar to import your source FLV video file.
Step 3: To change the output video file parameters, go to the lower left section in the program interface, and find the corresponding tab for your settings. For example, if you want to change the video format, open the "Video" tab and find the format parameter.
Step 4: Once the output settings are properly done, set an output folder with the "Output folder" box at the upper right corner, and then click the "START" button in the toolbar to start the converting task.

Part 5. How to Convert FLV to MKV online

Besides using professional media converter programs, another way to convert an FLV video to MKV is by using an online video converter tool. Comparing to the professional media converter programs introduced in the above, an online video converter tool may provide less customizing functions, but it can always bring a better availability and ease of use. As long as your original video is not too big in size and you have a good internet connection, a nice online video converter tool could definitely save a lot of your time and energy for the FLV to MKV converting task. Now let me take Online Video Converter V3.0 as an example, to show you how you can convert a video online easily and effortlessly.


Step 1: Go to the official website of Online Video Converter V 3.0
Step 2: Click the "SELECT OR DROP FILE" button to upload your source FLV video. You can also drag the file and drop it into the frame to upload.
Step 3: Once the video is uploaded, click the "Format" dropdown button to select "MKV" as the output format, and then click the "START" button to immediately start the online conversion.

Part 6. How to Play MKV files

After you have successfully converted your FLV video to MKV, you need a nice video player to play or test the newly converted MKV file. For the media player program, I would like to recommend Leawo Blu-ray Player for you to try, as the player is powerful, stable and easy to use. As one of the most professional video player programs, Leawo Blu-ray Player can not only play more than 180 kinds of video and audio files, but also play all kinds of DVD and Blu-ray materials with the original quality. With some other features like Virtual Remote Controller, Smart power manager and snap shot taker, Leawo Blu-ray Player can bring you the best MKV playback experience you could ever have.