Basically, I want to merge videos.
One software to do so is avidemux.
However my video is in mkv and avidemux does not support that. I can only do so slowly.
So I want to reencode my video to mp4 and then use avidemux.
Now, what software I should use?
The original question is to reencode from mkv to mp4. I learn that you can actually convert without reencoding.
That's the stuff. How?
The software need to support hardware encoding. My video is of full had 60 fps high quality with almost lossless. I do not want to sacrifice quality.