i'm running version 2.6 beta (build 848) on a mac pro 2,26 ghz 8core with 6 gb ddr3 ram. Only with one video layer and two very short and simple animation-videos (some dots flying around) the output playback is very slow or even stops completely. The main videos i want to use are photo-jpg, 75% and fullhd resolution. The animations vary around 720x576, also photo-jpg.
The output monitors (4 HDTVs) are connected via 2 ati graphic-adapters. The main adapter (for the TFT-screen) is one of those newer gt120 nvidia cards. Could the compatibility of the different graphic-adapters be the problem? Or simply the high resolution of the videos?