Matroska Mutlimedia Files are a container file that holds the information needed to display a file, like the video stream and audio stream. If you have a clip that you want to appear differently on screen, you can use a video editor to split clips, join clips, adjust the aspect ratio, change the picture quality and adjust the sound. You can also use MKV editors to change the chapter, title and tag information. One such tool is MKV Toolnix which is designed to edit the metadata and elements of your MKV video rather than adjusting the brightness, making clips and cleaning up audio. Two others are Video Splitter and Avidemux, both designed to edit the MKV video and audio itself. Video Splitter is a basic editing program designed to chop the video into pieces, merge video segments and change audio levels. Avidemux has more editing options, including filters to make fine adjustments to the light and color of your MKV file.

MKVToolnix

Step 1

Click "Add" to import an MKV file into the program. The tracks, chapter and tags will appear as separate files below the main MKV.

Step 2

Click on the attribute you want to change, and then click "General Track Options." Add a title, tags, time codes and adjust the language, if desired.

Step 3

Click "Format Specific Options." Choose either "Aspect Ratio" or "Display Width/Height." Change the size and output of the file by either typing in your desired size or choosing the ratio from a drop-down menu.

You can also adjust the frames per second, delay, stretch and cropping in the same menu.

Step 4

Click "Extra Options" and choose your desired cues and compression from the drop-down menu. You can also define your own options in the same menu.

Step 5

Click "Global" to change attributes for the entire MKV file rather than the individual layers. Adjust the name, tags, splitting and linking as desired by typing in the text boxes.

Step 6

Click "Chapter Editor" to adjust the chapters, if there are any in the MKV. Click "Start Muxing" when you're done, and then click "OK."

Video Splitter

Step 1

Click "Input," and then choose your MKV file. Click "Open."

Step 2

Drag the orange arrow over the video clips to reach the point you want to edit. To split the video into separate sections, click "Trim."

Step 3

Click the Thumbs Up icon to keep a piece of film you've selected with the cursor. Click the Thumbs Down icon to remove a clip you've selected.

Step 4

Click a place in the film and then click the Up Arrow icon to add a market. To remove a marker, click the Up Arrow icon with a slash through it.

Step 5

Click "File," and then "Save Project" to save your changes.

Avidemux

Step 1

Click "File," "Open," and then select your MKV file. Click "OK."

Step 2

Drag the cursor to adjust the position of the video. Click "A" to set the first marker and "B" to set the second.

Step 3

Click "Video," and then "Filters." Click "Colors," and then double click the filter you want to use. Use the sliders to adjust the video image and then click "OK." To add other filters, choose a category, double click the filter and create a list in the Active Filters column. Click "Save Filters" to apply them to your video.

Step 4

Click "Configure," and choose your display width. Click "OK."

Step 5

Move the volume slider up or down to adjust the volume on the clip.

Step 6

Choose a format from the Video Format, Audio Format and Output Format drop-down menus.

Step 7

Click "File," "Save," and then name your file. Click "File" to save the video.