although some 1 may have mention this in another thread i wasnt able to find it so i am going to mention it here in it own thread there is a easy to use converter that works with mkv files u still need all the codecs though
MovKit Batch Video Converter http://www.movkit.com/
MovKit Batch Video Converter works with all popular video and audio formats.
With it, you can convert the following types of files: AVI, MPG, MOV,QT, WMV, ASF,DAT, VOB, RMVB, RM, MP4, MKV, OGM formats.
Your video can be saved as: AVI, MPG (VCD, DVD, SVCD), WMV, RealVideo formats.
* Extreme fast Conversion speed.
* All supported formats to MPEG1.
* All supported formats to MPEG2.
* All supported formats to VCD,SVCD,DVD(PAL,NTSC)
* All supported formats to AVI(DivX,XviD, MPEG-4);
* All supported formats to Windows Media Format (WMV/ASF)
* All supported formats to RealVideo Format;
* Specifies start and end position while convert and joint.
* Batch file conversion .
* Extracts images from all supported video formats.
* Preview before long time execution.
* Backup DVD Disk(.VOB) to all supported formats.
* Backup VCD Disk(.DAT) to all supported formats.
IT does seam to work prety good although it not very fast it could be becuz i am converting mkv file with two type of audio and two subtitles and it going from and mp4 audio to an mp3 now but it does works so have fun