TMPGEnc and resizing

[ChrO]

I capture from VHS in 704x576 in PICVidio MPEG Q19
In VirtualDub i resize to 352x576, add other filters and frameserve to TMPGEnc.
I want to make a CVD (352x576) But in TMPGEnc i can choose, under resizing, between "Center" and "Center (Keep aspect ratio)", i want Virtualdub to do the resizing in presize Bicubic, so my question is wich setting is the right in TMPGEnc?

If i choose the one with "Keep Aspect ratio" the picture will be shrinked horizontally, does that mean i have to frameserve in 704x576, or will TMPGEnc then resize it?
What is the difference?
I hope someone can clear thinks up for me, thanks in advance.
Christian

[DEmberton]

Have you tried "Full Screen" in TMPEng?

[ChrO]

Thanks for the reply!
But "Full screen" will only work if you frameserve with exactly the right size(352x576) right?
If you crop some noise off the edges and just want TMPGEnc to add some black borders instead, you have to center it, is that right? Because i keep the interlacing. so it should not be resized vertical.
Sorry i dont think i explained myself good enough..
I just want to prevent TMPGEnc from resizing, virtualdubs Bicubic does such a nice job
Sorry for my english...