Master file is poor quality when played in QT

I have a 45 minute documentary that was ingested as native into FCPX from a Sony XDCAM, compressed in compressor using mpeg-2 for DVDSP.
All this worked fine.
My question is about the master file. It is 422 (same as source)and Linear PCM. Playback in QT is pretty poor quality.
I optimized (as I was working in proxy) before creating the master file.
My question is, is this normal or did I choose the wrong settings?
Thanks
Sandy

What are the complete specs of the original media besides XDCAM?
compressed in compressor using mpeg-2 for DVDSP.
It is 422 (same as source)and Linear PCM.
I don't believe this is correct. If it's compressed for DVDSP it's going to the DVD standard and is no longer 422. The audio is separate and is normally compressed to an AC3 Dolby Digital file.
I optimized (as I was working in proxy)
Did you switch back to original/optimized before you exported, or did you export the proxy version?

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Message was edited by: Brandon Rohde

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project was shot in 960 HD
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I exported the finished project using the "Export Quicktime" command
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project and dragged the file in. On the iDVD preview,
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