Video and Audio off beat

i am trying to convert a avi into a mpg file but using TMPGEnc after i combine the two video and audio files using mpeg tools, a pop up says file underbuffer and it may cause problem when burn, any suggesttion on fixing this?

 

one more thing the file is perfect before i combine video with audio

 

should i just burn it with out doing the mpeg tools step even through i had the ac3 sound file

 

Try use DivxToDVD to convert the avi into dvd compliant format to see if it's better.

 

Or, simply, you need to extract the AC3 streams from the AVIs you used, convert those AC3 streams to say, MP2 224 kbps CBR 44.1 kHz (HeadAC3he is excellent, for this), and multiplex them to their videos with TMPGEnc File___MPEG Tools.
Later you'll join them as you know how to do...
VirtualDub (Stream__Stream List___Demux [bold] avoid pressing 'Save WAV', because if your PC cannot uncompress AC3, it just demuxes and generates a 'fake' WAV which is , in truth, an AC3[/bold]) [AVI -> AC3] and HeadAC3he [AC3 -> MP2] are very suited for doing these operations.