I've recently been experimenting with green screen footage in Premiere Pro cs4. I shot some footage of my son in front of the green screen using my AVCHD camcorder. This keyed out perfectly using Premiere Pro, but when I opened the project in After Effects cs4, it looked terrible. There were lots of green patches that had previously been keyed out in Pro. Also, the picture looked very pixelated and blocky. This doesn't make sense. I assumed that I could import the project into After Effects and it would be the same as it was in Premiere Pro. I've also tried importing the green screen footage into After Effects pre-keyed, but had the same results. Any advice welcome.
Thanks in advance,