Either way, congrats, you just converted an MKV video file to an MP4 video file and you didn’t have to buy anything, just download a copy of the open source VLC program. Pro Tip: I’ve been writing about the Mac system for years and have a massive library of Mac help and tips for you to explore. Support for displaying video thumbnails has increased with each new Windows release as new video formats become integrated by default. Windows 10 can show Matroska (MKV) thumbnails as standard and has better MP4 support although there are still several video formats that no version of Windows supports out of the box. If the format is not.
Tip
.MKV Thumbnails on Catalina - QLVideo now works! I don't know if anyone has posted this, apologies if this is a duplicate. The QLVideo plugin to get.mkv thumbnails has been updated from February 2019's High Sierra/Mojave version 1.92 to version 1.93 that is compatible with 10.15.x Catalina. Load your videos To import your videos, please open the program and click 'Add Files' on the main interface. Alternatively you can directly drag and drop videos to the program in a batch. Then you can click on the video thumbnail to play it.
Hey
Every so often you will come across a video that has a pretty rubbish thumbnail. Most of the time a video thumbnail in Quicklook will show the first frame. But you can easily change the thumbnail with only the couple of steps. For this example (which isn’t the best) I am going to use Experiment Of The Week, which is a great video if you want to subscribe.
The first step is to locate your file. If you set Quicklook in Finder you will see you video displayed with the thumbnail.
If you open up the video in QuickTime and select the frame you want. You can pick any frame you want. Then press Edit > Copy or Command + C. This will copy the frame to you clipboard.
Mkv Video File
The next step is to Get Info on you video file. Right click on the file and select Get Info. Then select the small thumbnail in the top left corner and press Copy and Paste.
This will paste the frame into the thumbnail of the video. It will then be used for every thumbnail shown. The quality of the thumbnail will depend on the image you chose. You can also images from other sources.
How To Open Mkv Video
If you ever want to change it back. Press Get Info again select the thumbnail and press delete. It will then revert back to original thumbnail and you are done.