Avisynth with audio

AviSource/DirectShowSource("filename") Trim(first frame, last frame)

Yeah, that's what I had already, but how can I use this to get my final output? I was planning on using CCE, and that's all well for the video, but what about my audio (I don't want to have to re-encode the audio).

Yes, the audio (5.1 AC3) is muxed in the avi file....maybe I'm missing something...if I use that AVS in CCE, it outputs to an mpv file...do I just have a setting wrong in CCE? How do I get it to include my source audio in it's output?

I think the CCE forum could help you a lot more with that, you might start a thread there or ask a mod to move this one. However, directly editing AC3 to match up with your avs edits might be a bit troublesome, given that you don't want to re-encode it all. (Understandable.) That's where audio forum could help, so the thread's getting pulled two ways. :p

I'm not quite sure this belongs in CCE... But, my question is (I'm at work so I can't test), can I just load this AVS script into VDubMod and demux the ac3 from there (will it work right with the trim commands?)

I was successfully able to cut the ac3 stream at the frame level with mpg2schnitt