thanks a lot for the tip, so here more details ( i still have no answer, i went to sleep !) :
so i have a Mac pro 2 X 3 GHZ dual-core intel Xeon with 4 g of Ram, running OS 10.5.6
I m using the fcp studio 2 : compressor 3.0.5
FCP : 6.0.5
quicktime pro : 7.6.0
the source media is dvcpro HD 720p60 (shoot at 30PN with a hvx200a)
out put as a self contain movie directly from FCP as dvcpro HD 720p60
Then i try to compress it to be or prores 4.2.2 or uncompress 8 bit with a ntsc format 4:3 720x480 , letterboxed to keep my nice 16:9 look at 29,97 frame rate.
i ve tried a couple other export and i m know with a 14,64 Gig file of 2:45 min. Exept the frame size, the codec i can see that the bit rate as a huge difference : 59 109 for the original and 762 261 for the export one. The original one is 1.14 gig.
Any idea ? thanks again to help me. I can pay to have it done, but i would really want to understand, cause i m pretty sure i have everything with me to do it properly.
Thanks, hopefully i will be smater tonight cause of you guys !
BART
http://www.strangefamilia.com