Trying to merge MP4 files with MKV Tools

Discussion in 'Mac Apps and Mac App Store' started by PhazonUK, Jul 14, 2010.

  1. PhazonUK macrumors 6502

    Jun 1, 2010
    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.
  2. deadwulfe macrumors 6502a


    Feb 18, 2010
    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?
  3. Powerguru macrumors newbie

    Apr 4, 2010
  4. frega macrumors member

    Jul 28, 2010
    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.
  5. emmgunn macrumors member

    Jul 7, 2008
    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.

Share This Page