I have been using DVDX with alot of success by increasing the bitrate to the point of using 95% of the cd. Two cds later the look is very good, BUT.... I keep getting a response at the end of encoding telling me about a few buffer underflows and the suggestion is to increase the mux rate. After using the TMPEG program to cut the file and using the non-standard header does this correct the underflows? What exactly does the mux rate do and by increasing it will I be forefitting any movie quality?