It certainly feels like rolling shutter is much improved in the GH4 on my limited testing of it. The review will be coming just as soon as Panasonic can spare one.

Some questions remain unanswered, well at least I haven't found good answers...

1. If downsampling from 4k to 2k, will software stabilization like Mercalli be more effective before or after?
2. Same for denoise, better before or after and why?
3. The downsampling itself, does it vary from program to program or is it just simple math averaging 4 pixels to 1?
4. On the GH3 fast lenses wide open are plenty sharp for video since pixels are binned anyway, but 4k video which simply crops the sensor a little bit, may the video not appear as sharp wide open?

@Mistas based on logic alone:

1. I would stabilize the 4K footage so you don't lose resolution when the footage is cropped. Then downsample the cropped footage to 1080p;

2. Downsampling by itself will make any noise have a much finer grain, so I would first downsample and then denoise. You'll probably find that you need a much lighter touch on the resampled footage and thus preserve more detail;

3. Not sure but I would bet that it's not a simple averaging. There are many algos for downsampling and some are better than others;

4. Even at 4K it's still the equivalent of an 8 MP still image, so there's little possibility of the sensor outresolving your lenses. Also, 4K uses about a 2.25X crop, so the sharper middle part of the lens will take up more of the frame.

I've had Panasonic cameras in the past. This camera FINALLY comes with a cine D like gamma curve (sort of like Cine mode on old consumer cameras except Cine D was in their pro-sumer cameras). If this was a pre-production camera then it was not activated yet. You'll see a big difference in the shadows and highlights when using it. Check out some Panasonic cameras on Vimeo using these settings and see what I mean. All I know is the GH-4 will have it and that's a good thing. So foget these silly examples posted on this thread and wait until we get our hands on the finished product. :)

@Ian_T agree, can't wait to see this in use. I'm almost giddy with anticipation. LOL

I really hope panasonic or third party supplier will make a simplified YAGH+"batterygrip": XLR/audio features like the YAGH and slots for two panasonic batteries (or cheaper battery solution).

I like the YAGH for what it is. But many (even more?) need a "simplified YAGH" that keeps the compact footprint of the GH4 while improving audio features and operation time.

http://hybridcamerarevolution.blogspot.co.at/2014/03/panasonic-posts-new-gh4-108096p-slow.html

Some slow motion footage, as well as a demo of the Master Pedestal feature.

I didn't notice any stability problems and this test was about something completely different from stability anyway, so calling it "crappy videos" is a bit of an overstatement. I was intrigued by what I was seeing. Still wanting more samples.

Thank you very much for the video driftwood and Ralph_B. It is very relevant, extraordinary detail and dynamic range.

All these sample videos shot on the GH4 aren't impressing me the footage is looking the same a GH2 or GH3. Panasonic needs better test shooters for these sample videos I'm pretty sure Philip Bloom or anybody of some such like that would squeeze the juice right out of this camera & we'll see what its really made of. Heck I'm pretty sure I can make better sample videos than the people that are shooting the sample videos for Panasonic. Not saying that I feel the camera is garage I feel the opposite of that, I feel like it is an incredible camera but all the people shooting these test footage aren't pushing the camera to its full potential & showing how truly incredible this camera is!