Kevin,
This confirms my suspicion. I, too, have exactly the issues you describe shooting .mov with my GH4. Being that I’m running Win8.1 fresh out of the box on my PC that has nothing other than Adobe CC 2014, Quicktime and VLC installed tells me it can’t be related to software/codec conflicts. My system is top-of-the line for a laptop: i7 4800MQ 2.7 ghz quad core, GTX 880M 8GB, 32 GB RAM, and internal SSD’s.
I’ve spent countless hours with level 1 Adobe tech support and they say they have no idea what is causing the problems. I’m no escalated to level 2 support. I’ll relay to them that it’s likely an issue with native GH4 .mov files since you and I are experiencing this together.
My guess is any fix will be far off in the future so my goal is to find a something other than AME to transcode all my files into .mp4 (maybe .mov would work as well) and going forward only shoot in .mp4.
Let me know if you’ve come upon any other solutions.
Drew