A single, "long piece" MKV file will be created in seconds because no conversion is taking place. 2. Alternative: Command Line with FFmpeg
Open MKVToolNix GUI and drag your first file (e.g., 1.mkv ) into the "Source files" section.
The standard community recommendation for this task is using the MKVToolNix GUI . It is specifically designed to handle the Matroska format . A single, "long piece" MKV file will be
Right-click the file you just added and select "Append files" . Select the remaining parts (e.g., 2.mkv and 3.mkv ) in their correct sequential order.
The -c copy flag ensures the streams are copied directly, preserving original quality and speed. 3. Handling Seamless Branching (Blu-rays) The standard community recommendation for this task is
Create a text file named inputs.txt containing the file names in order: file '1.mkv' file '2.mkv' file '3.mkv' Use code with caution. Copied to clipboard Run the following command: ffmpeg -f concat -safe 0 -i inputs.txt -c copy output.mkv Use code with caution. Copied to clipboard
Click "Start multiplexing" (or press Ctrl+R ) to begin the merge. Select the remaining parts (e
If you are working with files ripped from a Blu-ray where a movie is split into several segments, tools like MakeMKV can automatically detect the "segment map" and join them into one continuous file during the ripping process. This is often used for different cuts of a film (e.g., theatrical vs. extended) on the same disc. Compatibility and Playback