It appears after perhaps the last update Premiere Pro CC 2014 started freezing during editing. It appears to happen mostly with 4K material and using the Ultra key and alpha blending but may also occur with 4K titles. The sequences are 23.976 1080p, with mixed footage from the Sony A7S (50 Mbps XAVC-S/H.264) and GH4 (4K 100 Mbps H.264). There are also frequent crashes with GPUFoundation.dll (Mercury + CUDA). No freezing with software only rendering. I tried a variety of drivers when using a Quadro 5000 with no change in freeze behavior. I tried a new GTX 770 (clean driver install) and the freeze behavior and GPUFoundation.dll crashes are the same, however now even the mouse freezes. With the Quadro 5000, the entire Windows GUI would freeze (become inactive), however the mouse would still move. Thus, it appears there are issues with both NVidia drivers and Premiere Pro CUDA code path on Windows (app errors shouldn't be able to lock up the entire GUI). GPU Meter shows low GPU and GPU memory utilization during the freezes. The freezes typically occur when switching between clips during playback or scrubbing (more often with fast scrubbing). As a developer, it feels like some kind of semaphore lock / race condition, since during the freezes CPU, GPU, and memory utilization are very low. Additional hardware info: 2010 MacPro 12-Core, 24GB RAM running Win7x64 (with latest updates). Side note: PPro used to hang in memory on exit, but stopped after a recent Microsoft forced update (PPro now crashes sometimes on exit but no longer hangs in memory (used to have to kill it after exiting every time)). Has this been reported before? (A7S XAVC & GH4 4K footage is relatively new)
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