Thanks both of you for your help. Yesterday I discovered perhaps the problem. I’ve made a little test movie, on which I’ve made several colored zones (100%, 90%, 80% and 70%). Then I rendered the 3 movies (I’m in Europe, so we work in the PAL format) in dv pal (1.067) in pal widescreen (16:9 1.422) and in HD anamorphic (1.333).
Looking at the results on the television, I’ve got 10% cut off left and right with dv pal and none on top and botton. I’ve got 10% cut off left, right, bottom and top on HD anamorphic, and I’ve got a very strange result in widescreen: almost 20% left and right, and bottom and top cut off.
So I’ll render it in the SAME settings as the project was: HD anamorphic, and then my safety zone will be ok.
The only problem is that then there will be a difference for renders for PC. I’ll have to resize the render then so that I get the frame as I wanted it to (so that I cut off the unwanted 10% myself).