In the Tools section, there are numerous Codec for say AVI. Are there any tools that can tell me exactly which codec is being used for say DivX and which codec for Xvid. For example, GSpot tells me I have a few compatible Codecs for MPEG-4 but never tells me which one will be used.

Also in MainConcept, CCE and TMPGE Plus, how can I specify which Codec to be used for converting an AVI file into MPEG?

Thanks in advance for your help.