The Yi 4K+ uses a new processor. It has four advantages due to its being more powerful and more energy efficient:
1. One can now shoot UHD (4K) video at 60 fps.
2. One can shoot UHD at 30 fps with EIS that is very sophisticated and digital fisheye correction in camera (no crop).
3. Battery life is longer.
4. No overheating.
Why do we care about 60 fps? Actually, I can never detect the difference between video shot at 30p and 60p. The key advantage is that you can slow down the video and still have 4K, using 30p as the rendered video.
Why is slowing down useful? You can smooth out camera moves - it smooths out pans and, most importantly, smooths moving with the camera (on a gimbal) - and subject action slowed down makes that action more interesting.
I decided to test out this new camera, taking advantage of its 60p in 4K. I had a gimbal, so I could move with the camera (it also produces motorized pans). To achieve the minimum weight (125 grams) for the gimbal (Feiyu Crane M) I put the camera in its waterproof case. So, I was going to shoot on the beach, temperature over 80 degrees (F) sealed in an airtight case! Will it overheat?
1. I shot for a period of 1 hour 31 minutes, never turning off the camera in the hot sun, until the battery ran out (first charge). That is much longer battery life than any small camera I have ever used.
2. I shot 50 minutes of “footage” taking up 51 GB’s on the micro sd card (135 Mbps bitrate) during that time.
3. No overheating - again, the camera was on the whole time, and 55% of the time the camera was recording. No other small camera I have used (Sony RX100 IV, GoPro Hero 4 Black and Hero 5, Samsung 360 Gear, Kodak 360 4K) could do that, not even close. Now, overheating can shut the camera down or it can cook the sensor (hello, GoPro and Kodak and Samsung), resulting in low-resolution results. Neither happened.
And here is the edited 4K video, shot on the gimbal - with smooth slowed pans, and slowed moving with the camera and static shots, some slowed. You are seeing 4K, a dynamic video and slow motion!
Now, what about using the camera without a gimbal? How good is the EIS in 4K (30p) in eliminating shakes? Here is the 4K test video, all handheld (static shoots).
Pretty amazing, and I do not see much loss (if any) in resolution. Handheld, 4K, tiny camera - better than the Sony BOSS.