Because most Divx/Xvid files use VBR MP3 or AC3 audio TMPGEnc(as well as other encoders) have a problem encoding...here is a simple guide how convert to a VCD,SVCD or DVD compliant MPEG.

What you will need:
TMPGEnc
AVICodec (GSpot will work as well).
AC3Tool

1.Use AVICodec to see the files' properties and download any needed codecs
(if the audio is AC3 use AC3Tool and procede to step 3):


2.Load the file into TMPGEnc main screen(DON'T use the wizard)->go to File->Output to file->WAVE and convert the MP3 to 48khz WAV for DVD or 44.1khz WAV for S/VCD:


3.Load the WAV in 'Audio Source' then go to 'Load' and select the desired output:


4.Hit start to encode.After encoding you simply load the MPEG in Nero Burning Rom for a S/VCD or use Nero Vision Express,TMPGEnc DVD Author,etc to author a DVD.