You were right, the reason why I get so crap result was the flag in the media propieties set to progressive. I Didn’t know the existence of the flag, I thought was intrinsic in the format specs the information about the interlace method… Now it’s much better, happy to know was so easy, sad I didn’t realize that before! I still hate the guy who had this great idea, ‘ let’s interlace’……..
Thank you for guiding me, and good luck on your stuff!