In addition, i's easier to understand why you would need a tool like this one.

If you add the fact that embedding subtitles is possible as well, then you can understand why it's preferred by so many people. It's also capable of carrying numerous videos and audio sources in a single file, which is very useful if you have something dubbed in multiple languages. The only difference is that it follows an open standard free container format, which makes it all the more interesting for people who want to use it for packaging. Matroska, or MKV for short, is just a container, pretty much like anything else such as MP4, AVI, and so on. Some of you might wonder what this MKV file format is. The truth is that the application can do more than just tell you details about any particular file, and I want to show you some of these features. At least, this is what I was using it for.

MKVToolNix has been around for a long time, and many users already know about its existence, but it's mostly used to identify and read the properties of MKV files (Matroska). Nonetheless, it's a useful app, and it would be nice to take a closer look at it. The application falls into a very crowded niche, and there is not much competition for it. I found in the chapters menu I had to save file 2 as an mkv matroska file though.MKVToolNix is a set of tools that can be used on MKV files, which is a video format that grows ever more present in our daily lives. So thank you for that paulster I now know how to do it and will make the next attempt right. I made one slight mistake and named two number 34 files so cocked it up, but at least it worked in VLC player and took me to the right chapters. I just altered all the chapters from 1-25 to 34-59 backwards and saved in the chapter editor as Save to matroska file and it is letting me mux it at the moment. That didn't work, so have just followed your instructions and had a message something like you have used chapter editor which is separate from whatever and will not be muxed or something like that.

At the moment I am experimenting with changing the chapters in Media info and saving as xml files, extracting the video and audio from my full film with MKVextract and am just waiting for that to finish, then I am going to try and input all files into MKVmerge to see if that works.

Mkvtoolnix gui merge instructions