Recompressing Avi with different output resolutions

[Guest_imported]

I've written a directshow recompressor for avi files. I got most of my help from the directX sdk documentation. But the problem is when i use codecs such as cinepak and others they compress to 320x240 instead of what the original video resolution was. How do i change the compressors settings so it works properly.

any help would be apreciated thanks