The frame size does not make any difference to the suitable settings. I already said that!
You do not need to deinterlace a stream with progressive content.
If the content is progressive, it cannot be "somehow interlaced".
I suppose you are failing to distinguish between the nature of the stream content and how it is encoded. It's a common mistake. You need to focus on the content, i.e., are the field pairs sampled at the same time or at different times (the field period). You can look at #1 and #2 here for a way to determine the nature of your content:
http://neuron2.net/faq.html
If this is all gobbledegook to you, then you need to go back to basics and learn about video before attempting to do any serious work.