Bad quality export

Hello to all,
I'v exported form Color to FCP a project in 720x576 DV PAL with a rendering in Apple ProRes 422(HQ).
The sequence in FCP that comes from Color has images with a certain fuzziness. Only the images that I rendered have that problem.
Where does that come from ?
I'v been told that Apple ProRes 422 has a squared pixel format and DV-PAL not so I tried to put in my Color user prefs, "QuickTime Export Codecs" in "Original Format" but that option is grey and I can't select it.
Why does that happened ?
Thanks four your attention !

In my experience with that topic (including transparency), only PhotoShop is reliable to render pixel-perfect images out of InDesign files (with the help of the intermidiate PDF exported). This did not change with CC…
InDesign is often not aware what's inside a shape or not. Consider  tables inside a text frame, applied effects like drop shadows etc.pp. that would be exported to PNG (or even JPEG).
Only AFTER a PDF is rendered in PhotoShop (with transparency) you could crop the rendered image to the painting pixels to get the minimum area for your image.
Uwe

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