A couple of things:
1. The single drive is not helping you at all.
2. Try a 1080p project sequence for your self...but I dont expect that to help considering point 1.
Your system is below minimum requirements. It is like you have a new Porsche engine and installed that in a 40 year old Beetle, without adapting the gear box.
Do your self a favor and get at least two extra SATA 7200 disks.
I mean the video is on a single drive; the system also has an ssd boot drive and a 2tb raid 10. But the raid is made up of wd green drives, the write spec on the raptor is about the same, although the read is much better.
Do you mean minimum requirements for 1080p?
Hardrive is single wd raptor.
This statement put us on the wrong foot. 4 green disks in raid10, plus a SSD boot disk in addition to the WD Raptor is a different story.
Jerkiness can be caused by background services or processes, Check this out: Windows 7 Service Configurations by Black Viper
and use Process Explorer to see how many processes are running. If more than 50, there are a number you can easily kill. Ideally you will have around 40 or less processes running. Of course you have indexing and compression turned off on all your drives, disabled the sidebar, use the latest video driver, etc. All the usual steps to nelp improve performance.
thanks for the link, will check it out
Premiere CS4 does not natively support h.264, which is used on Canon 5D and 7D for videos.
Install MPEG Pro™ HD 4 from mainconcept and use it as described in their manual.
You system does certainly meet the requirements to edit h.264 - at least cut&arrange footages.
in that Article it is recommended to use the Cineform converter. I have this converter too - and it is the most bad idea to use for editing Canon 5D/7D HD Videos. In short: It converts to an intermediate format which shall be editet within Premiere and thereafter it must be encoded again into h.264 or whatever.
With MainConcept or the new CS5 the Canon files are edited directly. Only changed parts will be re-encoded. On top, the cineform makes some changes in FPS without adjusting the audio pitch. It's a worthless tool.