Difficulties Merging Two MKV Video Files

I’m brand new, so have some patience!

I’ve ripped a two-part (two discs) into two separate MKV files. The rips include the soundtracks and subtitles I want. Now, nothing needs to be shared - I just want part 2 to play right after part 1.

I tried the MKVToolNixGUI, using the multiplexer. Part 1 is 1.7 GB. Part 2 is 656.7 MB. The resulting file is 2.55 GB. This makes me think that it worked. But when I try to play the resulting file, the second part of the movie isn’t there!

Any advice as to what I did wrong and how to fix it? (I saw mention of a MKVMerge product, but didn’t see it on the web site. Should I have downloaded that instead?)

Welcome!

Please see this FAQ entry.

The FAQ entry was very clear, but even after installing MKVToolNix, I cannot get it to work. MKVToolNix installed to C":\Program Files" and that folder requires administrative authority to do anything. My videos are in “C:\Videos”. I tried this command:

mkvmerge -o “C:\Videos\Pearl Harbor.mkv” “C:\Videos\Pearl Harbor Disc 1.mkv” + “C:\Videos\Pearl Harbor Disc 2.mkv”

and got this error:

mkvmerge v92.0 (‘Everglow’) 64-bit
Error: The file ‘C:\Videos\Pearl Harbor Disc 1.mkv’ could not be opened for reading: open file error.

Do you know what I am doing wrong?

Use the GUI if you’re having trouble with the CLI. It uses mkvmerge under the hood, and what the FAQ entry describes applies to the GUI just like it does to mkvmerge.

That’s where I started. I added the two files to the Input tab Source file, and the Output file name to the Output tab Destination file name. For S & G, I also added the new file name to the Output tab, General File title. I didn’t specify any options.

All I get is the first file. :worried:


That article pretty clearly states that you have to use “append” and not “add”, which can be found in

  • the context menu when you right-click on an existing file
  • the menu appearing when you click on the small arrow on the right end of the “add source files” button

Thank you! I missed the part about clicking the first file and appending to it. I kept adding both files to the input individually! What a rookie error…

Thanks for your help and patience.