Trying to merge MP4 files with MKV Tools

[PhazonUK]

I've got 20 MP4 files I'm trying to merge into a single MP4.
When I drag any one of the MP4 files into MKV Tools it comes up with an error that says:
"The variable theTrackData is not defined. (-2753)"
Can someone either help with a solution to the MKV Tools problem or suggest another program to merge MP4 files without losing any video quality.

 

[deadwulfe]

Seems like MKV tools would be the last thing I'd think of for merging MP4 files. Have you tried using MPEGstreamclip or ffmpegX, instead, to merge video files?

 

[Powerguru]

use version 2.2.6

Please use earlier version, I had the same problem with the latest version 2.3.1.

Use 2.2.6. works like a charm.

http://www.emmgunn.com/mokgvm2dvd/mokgvmdownload.html

 

[frega]

does mkvtools reencodes it when it merges it? i was gonna try it.

what i USED to do is use Quicktime Pro, paste clips together and make a medialink file, no need to reencode... but we no longer have QT Pro.

 

[emmgunn]

There is no re-encoding happening in the join process, so it's a relatively quick process. The newest beta fixes the bug found in 2.3.1 and has some added features like the ability to split and delete/extract tracks from an mp4/m4v videos.