Thank you for your valuable feedback.
So do I get you right, when I sum it up to:
Blue Ray specs say: Either I need to go with a "low resolution" (720p) and in this case I have the progressive picture - OR - I can have a high resolution (1080i), but in this case, I need to live with the "slobbery" effects of interlacing. (Admitably, those effects are not too visible, but in fast scenes, they are.)
Is this a somehow correct summary?
That also means, that if I would encode in h.264, 1920x1080 - 50 frames per second *interlaced*, Toast would not need to re-encode and "just burn" the Blue Ray disc?
And a last question (sorry for having so many ;-)):
What would you guys suggest me to do, i.e. what looks better on a full HD TV (using a ps3 as Blue Ray player): 720p or 1080i? Is there some "rule of thumb" what is the better quality?
Does it depend on the input material? The input is coming from a Sony HDR SR-1 AVCHD cam, that natively produces an interlaced 1440x1080 (so having rectangular 1.3333333 aspect ratio pixels). I used iMovie to expand it to square pixels and got then a non-interlaced 1920x1080 video as base. Looks **great** if I watch it on my Mac and my goal is to bring that to Blue Ray, so the question arises, if, coming from that kind of input material 720p is "better" than 1080i? Or is it better to "re-interlace" my 1080p to 1080i?