Poor quality results

I have Sony DCR-SR82 (HDD) camcorder, which uses MPEG-2 file format. Imported this directly into iMovie08 (cool!) and used iDVD08 to burn DVDs. It looks blurry. At least, not as sharp as video played directly from the camcorder on TV. So, I decided to explore some other avenues, ... namely using iMovie HD.
Here is the workflow:
MPEG-2 --> DV (MPEG Streamclip) --> iMovie HD6 --> iDVD08 (export from iMovie HD directly) --> burn DVD
This resulted in significantly sharper picture then those using iMovie08, but I am still not pleased with the quality. The edges are chopped up (like stairs), whenever there is a bit of a motion. This is really annoying. In iMovie HD6, while editing, it looks better, … Perhaps I am doing something wrong in the workflow described above.
Other info:
*Camcorder: Recorded in 16:9
*MPEG Streamclip conversion to DV : Kept all default settings (don’t really understand what they are)
*iDVD: Professional Quality.
*Media: DVD-R, Sony
Any help is highly appreciated!

Milan 011 wrote:
...How on Earth is this possible?
iMHD6 is a DV-editor for TV delivery.. so, the used codec CREATES interlacing to fullfill the international standards for NTSC/PAL ..
e.g.: you import stills (=no interlace), add a disolve= interlacing..
another example: you import 'progressive' material (special camera, CGI, whatever..) = any iM dv-stream export is now interlaced..
the capabilities of your playback device have no connections to the input.. any DVDplayer delivers interlaced.. or, you have to 'tell' it not doing so.. any 'tube' TV does interlacing..
commercial films on DVD are +per se+ progressive (=film), the DVD is usually in a video/TV standard = interlaced.. but both 'fields' of a progressive source show same content, even interlaced..
.. complicated issue to understand AND to explain in a foreign language..

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