How to convert flv to mkv in Windows Video Editor
Step 1: Select crop function.
First of all, an interface which involve a wide range of tools such as cropping, watermarking, joining, rotating, splitting and so on will automatically come into view when you open Windows video editor tool. Please click " Crop " to unlock the corresponding window.
Step 2: Import the flv file.
you should click "+" in an attempt to add flv files. After selecting and opening it, the video in flv format will appear in the perception of the field.
Step 3: Edit and Preview the video.
Click play button to preview, you may also cut or rotate the video or add effects, watermark or subtitle to the video at the same time.
Step 4: Export the mkv file.
Click "Export" after you have polished the video in mkv format. Provided that you want to export the video with mkv, you just click the boxes beside "keep original format" and "Export". You can pick out the terrace you want to upload to among YouTube, Facebook and Vimeo. You can also choose other formats and device to save it on the computer. Rename your video and ensure that the saving location is right. The settings for resolution are also available for you. Finally, don't forget to click "Export" to save converted mkv files.