Originally Posted by NoWhErE

No, your CPU isnt fast enough to process and swap all the information being sent from the video. With more RAM you can pre-render longer previews, work on bigger projects involving more clips, etc. But for actual playback, its all about CPU power and your video card.

Try decreasing playback resolution by right clicking on your playback monitor.

OR! Use Proxy Videos. Here is how to work with Proxy Videos :


Premiere Pro comes ready with Adobe Media Encoder, a handy little program for batch transcoding video. Drag your HD video files onto Adobe Media Encoder, select 640x480 as your video size, QuickTime as your file, and JPEG2000 or PNG as your codec while keeping your native framerate.

Why JPEG2000 or PNG? Both codecs are standard cross-platform QuickTime codecs, with JPEG being slightly lossy, and PNG being lossless. You'll end up with compact, high quality proxy videos that you can take between PC or MAC to edit in Premiere Pro.

Next, open up Adobe Premiere Pro and create a new project with a new sequence that matches your proxy video settings. Import all of the proxy videos into your project and go wild with editing. You'll notice your work area and effects previews all pre-render more quickly because your source videos are smaller.

Now here comes the fun part. In the same project, open a new sequence that matches your HD video settings. Return to your proxy sequence, select all of and copy your timeline, then paste the timeline into your HD sequence. All your cuts, effects, and transitions remain in tact.

In your project list, right click each proxy video and select 'Replace Footage' to replace your proxy video with your corresponding HD video file. Voila, you now have a full edit of your HD footage ready to be exported.