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From what I understand...if you shoot AVCHD do not use anything above 17mbps. Decent systems can edits native AVCHD below 17mbps with ease.
with the below mentioned config I can edit 2 AVCHD tracks (Sony CX6/7) in the timeline realtime , watching the CPU often at 100 %, realtime view for editing is not always perfect but still manageable, i.e. this works for basic editing purposes.
SW Vista Ultimate 32 bit, Cubase SX 4.5.2, Triton Le, Adobe Master Collection, Izotope Ozone 3, Reason 4, Native Instruments Massive, Battery 3, VSL Vienna Suite, HW Intel D975XBX2, RME HDSP9632, Quad Q6600 2,4 Ghz, 3 GB memory, Marvell 61xx 1 TB Raid 0 storage, GeForce 7600 GS silent, ext equipment MX200+166XL, Yamaha N12digital mixing studio, Genelec monitors 8020-A, 7050-B
elmu, I don't see it in your comments or your specs: what datarate for the avchd that you can edit two tracks?
Following specs handle 17Mbps AVCHD with no problem. 21Mbps AVCHD can be edited, but with added difficulty.
Asus P5Q-Pro Mobo
Intel Q6600 Quad Core CPU OC'd to 3.0GHz
4GB Corsair Dominator 1066 RAM
NVidia Quadro FX 1700 Video Card
(3) Western Digital 10k RPM Raptor HDD's (1 for system, 2 in RAID 0)
Everyone ive seen posting uses intel processors, is there anything I should know about AMD CPU's not running well with adobe products? Or is it just a coincidence that no one posting their specs uses an AMD?
17Mbps? Are you kidding? The EX1 runs 35mb/s and people are cutting it natively. Am I missing something?
What you are missing is the difference between MPEG-4 AVCHD and MPEG-2 XDCAM EX. Decoding and editing footage shot in the AVCHD format is much more processor intensive (2x-4x as much) as compared with the MPEG-2 format, AKA EX1/EX3. Even though they are both Long GOP, I-Frame codecs, they use different methods for compression and that is why you can edit 35Mbps XDCAM EX footage much more easily as compared to 21Mbps AVCHD.
>Even though they are both Long GOP, I-Frame codecs
That might cause confusion. Long GOP codecs store only 2 independent frames out of every 30, the rest being dependent on other frames, making them more difficult to edit. I-frame codecs store all 30 frames individually, making them much easier to edit. So a codec would be called either Long GOP (HDV, AVCHD, XDCAM EX) or I-frame (DV, DVCPRO, DVCPRO HD), but not both.
I believe the distinction you are trying to make is between Interframe compression (HDV, AVCHD, XDCAM EX) versus Intraframe (DV, DVCPRO, DVCPRO HD). Both are referred to as utilizing I-Frame compression, it just depends on the technical know-how of the person who is reading the post to understand whether the video format being referenced is Interframe or Intraframe. In future post I will try to remember to write out the name fully.
>Both are referred to as utilizing I-Frame compression
That's a bit inaccurate. "I-frame" is really only used as shorthand when talking about Intraframe compression codecs, where every frame is an I-frame. That's why it may cause confusion if you start using the term in reference to GOP codecs, where only 2 out of 30 are I-frames.