Really bad image quality when burning

Hi, i am very new at this discussion thing and am a french speaker so hope i do this ansking question ok.
I'm having problems with image quality of my 1h46 min movie imported from imovie (initially from quicktime made from final cut pro). I am having pixelly images when camera is moving... Although have read some things about this on the forum none of the answers seem to resolve my problem.
I have selected best quality in my prefs but with no success. I figure it's a compression / codec problem but i do not have a clue about all this technical stuff. I don't know what next move i should make.
Thanks for any help...
V
I'm using iMac G5 divided my 250 GB in 2 disks wich has 31 Go of free space on my HD at the moment. Using iDVD and i Movie 6.0.2
Imac G5 Mac OS X (10.4.7) 2.1 GHz Power PC G5, mémoire 1.5 GO DDR2 SDram

Hi ! Thanx for responding...
In FCP i did choose export DV/NTSC and imported from camera with apple firewire NTSC (720x480). Should i have imported material in (640x480/30fps/interlaced...) ?
I have had this problem with smaller projects of 20 min of video also so i don't think it has to do with size... At the moment i am making a disc image of my dvd on my desktop hoping to burn through Toast. Otherwise i am also thinking about exporting movie from FCP to tape then importing back to iMov through camera...
I'm kind of desperate and don't really know what to do... I'm also gonna start reading compressor 2 and maybe forget about iDVD an d just burn it through toast. Wich is kind of dissapointing cause without interface, menu and all...
V

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unclemano wrote
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