mkvmerge v1.6.5 ('Watcher Of The Skies') built on Mar 19 2006 23:11:32
'fight_mec_x264_1.mp4': Using the AVI demultiplexer. Opening file. This may take some time depending on the file's size.
'fight.ogg': Using the OGG/OGM demultiplexer.
Error: 'fight_mec_x264_1.mp4' track 0: You are trying to put AVC/h.264 video from an AVI or a similar VfW (Video for Windows) compatible source into a Matroska file in the so-called 'VfW compatibility mode'. Please note that this is not the official way to store AVC/h.264 video in Matroska. Therefore proper playback of such files cannot be guaranteed, and we strongly urge you to use the native Matroska-mode.
At the moment mkvmerge does not support converting from VfW-mode AVC/h.264 tracks to native Matroska-mode AVC/h.264 tracks. You can, however, first import the video track into a MP4 file with e.g. 'MP4Box' (use Google). Then you can use mkvmerge and put the video into a Matroska file.