I am on a IMac 3.06 Core 2 Duo with 16gbs of Ram and 1TB of hard drive (600gigs available). Just got Pro CS6 and am trying to edit footage from 2 Canon T3is .mov files. The Multicamera playback is extremely choppy and impossible to use. I am a beginner. Is there something I should be doing?
Adobe's MINimums http://www.adobe.com/products/premiere/tech-specs.html
This message has a really good graphic about requirements
More about Requirements http://forums.adobe.com/thread/618058
Disk Configurations http://forums.adobe.com/thread/878419
Outside of getting another computer. I have a 2TB external, Firewire 800. If it is just the processor speed, my Macbook pro is newer and has the i5 processor but only 500gb hd (assuming this should be enough).
Firewire 800 may reach a sustained transfer rate of around 50-60 MB/s in the best case. Two streams of AVCHD/T3is material is enough to choke it to death. Then add the really poor CPU, which is way overpowered with the complexity of the codec, and you end up with two serious threats. Typically such a system is 50 times slower than a fast system, maybe even 75 times. That explains the choppiness you experience.
Firewire 800 may reach a sustained transfer rate of around 50-60 MB/s in the best case. Two streams of AVCHD/T3is material is enough to choke it to death.
Hardly. AVCHD runs at a nominal 24 Mb/s, which translates to 4 or 5 MB/s with overhead. It's roughly the same rate rate as DV. (Not sure why you still don't grasp that.)
Even if the T3i doubles that to 50 Mb/s, you're still only at about 20 MB/s read for two streams.
Probably the same reason that you still don't grasp that your argument is way too simple and disregards all the other disk accesses required.
No, that's not it That's neither true nor does it explain why you don't get that AVCHD, HDV and DV all have roughly the same data rate. Each will tax the CPU differently, but the data rates for all three are the same, and each will tax the hard drive equally.
Run some tests, you'll see.
That confirms it: You are looking at it way to simple.
Say a 6 camera multicam sequence. 6 original streams to read PLUS the media cache files and media cache database pointers, the conformed audio and peak files to access, the editing of in and out points of the various cameras in the project file, the loading of the various .dll and .prm files for the effects and transitions used, and at the same time the OS maintaining event logs, updating file access stamps, indexes etc. Add to that the use of the pagefile, the swapping from memory to disk and vice versa and add in other processes and services running, some of which are constantly accessing disks and take into consideration the half-duplex nature of SATA disks and it is a different story.
Your argument is correct with regards to raw data rate, but very limited in scope for editing and practical use, as I have tried to explain to you numerous times. Either I'm very bad at explaining things, or you are stubborn.