www.makemkv.com

I already converted both files with Handbrake to H.264 to a new .mkv file and no issues with the codec.
Playing fine now.

Thank you woodstock. I found several methods but wanted to know what might be best. I do have handbrake and also found a manual on how to convert to H.264 so I will use this then. I've got time and got an Intel i7-7700K and 6GB gfx card so if I only do the conversion it should have enough cpu power ...

Thank you for the quick answer.

Something went wrong, I don't see my answer anymore, post dissappeared.

Anyway, I had a look with your instructions and they are indeed H.265 files.
The others which do work are H.264.

Is there a way I can create H.264 from those 2 files?

Thank you for the quick answer. Backups, or MKV files? They are different formats. Maybe I caused confustion. I ment when I make a backup of my original Blu-Ray or DVD with MKV it's a backup but also an mkv file, correct? But just to be sure, in this case it's MKV files. I was mistaken anyway, these...

I'm really a noob on codecs and properties and stuff, but I'm just wondering if there is a way to convert this. This is my problem. I've got several movies on my Asustor NAS system, which can be accessed from my Samsung smart TV which can play MKV files amongst other formats. However, I've got 2 bac...