hello,

I'm using CL17 on a win7 64bit box, quad i5 with 8GB RAM. The videos I am editing are typically about 3:30 long and I have to cut up and select between 4 video tracks, all synced to an imported audio track. The input videos are at 2700, and file size is about 430MB for 3:30

Initially the files were larger (up to several GB) but I found things were becoming unworkable, so I came up with trick of first syncing the input tracks to the audio (and colour correcting them) and then exporting each to create an already synced file of the same length as the outout file. This helped a lot.

But I still find that the preview lags by the time the 3;30 playback is done. This makes it very hard to identify edit points, and I end up having to do a test render so I can find the places to cut by running the test render in VLC and noting the timing. It's a pain.

Reducing the resolution of the preview helps quite a bit, though still not perfect.

I could push the memory on thos box to 16GB or 32GB but I am wondering if this is the issue? with four input files adding up to less than 2GB total, I would have thought 8GB would be OK for this project?

Thanks for any insights or advice.