Sound Bites LLC Posted March 5, 2015 Report Share Posted March 5, 2015 Hi All, So yesterday, Steve Farris and I tested some 4K playback on 2 different systems. One was a new Mac Pro w/ the Quad Core 3.7GHz Xeon w/ D300 GPU's and the other was my machine with an AMD FX-9590 @4.7GHz w/ a FirePro W9100. Both of these offer similar performance in the CPU department. Both machines are running Windows 8.1 Pro 64 Bit, fully updated. SSD's in both systems. Plenty of RAM. We only tested 2x 4K screens per machine since that's all that was available. These videos had the following basic parameters: 3840x2160 pixels H.264 24 or 29.97 FPS (depended on the individual video) Variable Bitrate that swings between 15-33Mbps Using VLC to play 4K videos, each machine could play 6x 4K videos using between 85-92% of the CPU on average. In Watchout 5.5.2, only 3 streams of any of these would play smoothly. Adding a 4th would peg the CPU. 2 of these 4K videos used approximately 60-65% CPU when using Watchout. The same vids played in VLC only used 25-28% CPU. It made no difference if the vids were full screen or windowed in VLC or full screen or scaled in Watchout. Is this just due to CODEC issues? VLC is not configured to offload any decoding to the GPU. VLC was also not installed, but in a standalone folder using the portable version. No CODEC packs were installed on the systems. Any ideas? EDIT: I'm going to add to this that I tested these same videos in QuickTime and it couldn't play 2 of these videos at the same time smoothly. They paused randomly, and stuttered. The CPU hovered between 40-50%. Quote Link to comment Share on other sites More sharing options...
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