How to Efficiently Convert Flash Video FLV to MKV?

Sep 24, 2021
  • Download Download WonderFox HD Video Converter Factory Pro
  • Step 1. Import all FLV video files.
  • Step 2. Select "MKV" profile as output format.
  • Step 3. Press "Run" to convert FLV to MKV in batches.
Quick Navigation
Step 1 - Import All FLV Videos
Step 2 - Select MKV as Output Format
Optional - Customize Video Parameters
Step 3 - Convert FLV to MKV in Batches

Author's Words:

Presumably most people are quite familiar with FLV video. As a Flash video format, in the past two decades, it can be said to have been in the limelight for a while and even once used as a de-facto standard for many web-based video streaming websites. However, since Adobe has officially ended support for Flash on December 31, 2020, the use of FLV format is doomed to decline.

Instead, Matroska is a free and open container format that can encapsulate an unlimited number of video, audio and subtitle tracks in one .mkv file, and is commonly accepted by a large range of media players, editors, game consoles and other devices. Therefore, many people are increasingly inclined to convert FLV to MKV. No worries, that's the main reason why I've compiled this guide below.

How to Efficiently Convert FLV Videos to MKV?

If you know little about video processing and have no idea how to convert Flash videos to MKV format, HD Video Converter Factory Pro would be the best assistant among all FLV to MKV converters screened out from the Internet. The highlights boil down to the following adjective words: straightforward, flexible, user-friendly, easy-to-use, self-explanatory, efficient and multi-purpose. If you think I'm bragging, then you might download it and follow the steps to try it yourself.

Hassle-Free FLV to MKV Converter

HD Video Converter Factory Pro provides a one-stop solution to FLV to MKV conversion as well as video editing, compression, downloading, recording, etc. The batch mode and hardware acceleration will save you from a long wait and repetitive & redundant work. Most importantly, it's a totally foolproof application with no threshold. More Details >

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Step 1 - Import All FLV Videos

Run HD Video Converter Factory Pro, to convert FLV to MKV, simply open its major module "Converter". Next, click "Add Files" or "Add Video Folder" button to add all the FLV videos you want to convert into the program. Alternatively, just drag and drop the Flash videos to the interface. After loaded, you're allowed to play the FLV files in the built-in player by clicking on each preview button.

Tips: In addition to "Converter", there are four additional modules ("Downloader", "Recorder", "GIF Maker" and "Toolbox") available that provide you with different practical functions. If interested, go ahead and start your personal experience.

Step 2 - Select MKV as Output Format

Click on the right-hand format profile to open the full list of 500+ optimized presets. To convert FLV to MKV, navigate to "Video" category and select "MKV" profile right there.

Note: All the 500+ presets are well-organized and grouped by major video/audio formats and frequently-used devices. In other words, you can also convert FLV to MP4, MP3, AVI, MOV and other device-compatible formats, etc. without further settings required.

Optional - Customize Video Parameters

You're also allowed to modify video parameters if you have additional requirement. Press "Parameter settings" button underneath the format profile to open a new window, where offers multiple options to customize video and audio settings separately, such as change video aspect ratio and video frame rate, adjust bit rate, resolution and alter audio settings. Then click OK to save the changes.

In addition, this application is also furnished with some basic editing features to help trim, split, merge, crop, rotate, flip or watermark video, even add subtitles and effects to video.

Step 3 - Convert FLV to MKV in Batches

Once everything is ready, click the inverted triangle icon on the bottom to designate an output folder to save the converted files. At last, press the big "Run" button to batch convert FLV to MKV. With GPU acceleration enabled, it will enhance the real-time conversion speed and performance.

Also Read: Convert MP4 to MKV | Convert AVI to MKV | Convert WMV to MKV | YouTube to MKV

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More than an FLV to MKV Converter, It Can Also
  • Convert FLV to MKV and 500+ configured presets in batches.
  • Edit video files with some entry-level editing features.
  • Compress uncompressed large videos with minimal quality loss.
  • Modify video/audio parameters in an intuitive and handy way.
  • Download HD/FHD/2K/4K/8K videos from YouTube & 1000+ sites.
  • Record live streams, gameplay, webinar, webcam, video call/tutorial...
  • Make animated GIFs from video or image sequence with ease.
  • Make ringtones, extract subtitles, make split-screen video & more...
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Final Words...

We have to admit Flash video is gradually falling out of mainstream use, it's a good choice to convert FLV to MKV or other burgeoning formats for free use on various platforms, websites and devices. Compared with processing video with some online video converters, the desktop application has the inherent advantages. Specifically, you don't need to worry about pop-up ads, slow conversion speed, file size limit and poor network connection. I hope the recommended FLV to MKV converter will bring you a fresh new conversion experience and help you out. Cheers!

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