I have 2 movies with the following info xxxxxxxxx.720p.x264.DD5.1.mkv, but this won't play in PS3, but i have converted one movie to .MP4 1280x720 with "PS3 Video Converter 3" it play fine in PS3, but stay with less than 2GB and audio 2.0.

I can split the video and audio, i get a .x264 (mp4) file that plays in PS3, an audio file .ac3 and a chapters file. My question is this, is any way to join that files in a new MP4 file that plays in PS3 without losing audio and video quality?