这个极为感兴趣，我用四核64位vista8G内存Premiere Pro CS4、vegas8、会声会影三种都卡卡卡，正烦恼呢！

前言：
Premiere Pro CS4编辑5D2素材的时候卡，是一个困扰全球性的问题，绝对不是机器性能问题，用我的Macbook Pro的FCP编简直就要飞:} 同一机器用Pr编，无论PC Mac都一样卡！大多数都在找其它的方法，如cineform转码，我可以用BMD的Intensity采集HDMI成M-JPEG，但这些都不理想，BMD的驱动刚更新，支持Pr401了，但是没法调用playback setting 不能忽略丢帧停止，也没法用，估计还要等新版驱动了。

看看外国朋友的方案：
原文不逐字翻译了，笔者的电脑配置绝对高，而且使用时候性能远没发挥出来，所以推测Pr的QT 的问题，于是重新打包了素材的MOV文件，变成MP4，不经过转码，结果编辑流畅了，原理是绕过QuickTime的解码器使用Pr内置的MainConcept的解码器。

具体的操作笔者还没说。明天先试试直接把后缀改成.mp4，要不就是用什么打包工具。

I've found some interesting results with Premiere CS4 I thought I would share. First, my current hardware:

Core i7 920 @ 3.6 Ghz
3 GBs of DDR3-1600 8-8-8-24 RAM
10,000 RPM WD VelociRaptor system disk
2 TB RAID 10 media disk
Nvidia 260 GTX 216 core
Windows XP 32bit

When working with untouched 5D MKII files, Premiere CS4 can't playback the files without stuttering. This happens to a lot of people and several solutions have been used (proxies, lagarith transcoding, etc). Several things bothered me about this:

1. During playback, system resources were not being taxed. CPU usage barely jumped 30%, HD transfer speeds were way below max, RAM usage average, etc.
2. Premiere CS4 is supposed to support AVCHD editing and in fact has several profiles for 1080p 30fps AVCHD editing. AVCHD is H.264, just like the 5D MKII, except it's wrapped in an MPEG2 transport stream. (I know that AVCHD is limited to 20 Mbps, but I considered this a minor issue)

I began to suspect the QT interpreter that Premiere CS4 uses. In order to avoid it, I re-wrapped the raw H.264 from the .mov file of a 5D MKII in an MP4 container. No transcoding.

It plays back and works perfectly.

An MP4 file, with the raw H.264 from a 5D MKII, at 40 Mpbs has no problems being edited in Premiere CS4. (At least on a Core i7) This is probably because it uses the MainConcept H.264 decoder in Premiere and not the QT interpreter.

There is one significant problem I've run into with this re-wrap. Premiere interfaces with QT to interpret and use the .mov files. When QT was updated, full 0-255 levels were available in Premiere, as QT presented them so. When the video is re-wrapped to MP4, Premiere once again thinks the color space is YUV (16-235) and throws away RGB levels 0-15 and 236-255. I'm strill trying to figure out the best way to deal with this. I only wish Premiere supported basic color management.