@gitup...It's a thing that support should resolve as well and this topic is for "support" also...
We have discussed this issue before, you even created a separate thread for it, I don't see the point in making a lot more posts on the same issue when Gitup already knows about it so this is my last one on this issue.
It would be great if Gitup support could resolve the issue with the sky, but as you have already said, it is seen on all Novatek based cameras so probably it needs Novatek to resolve the issue, except that the same issue is also seen on most other digital cameras, so it is not really a Novatek problem either.
Yes, it is more visible on Novatek based cameras than Ambarella based cameras, but by doing a better job of the sky, the Ambarella cameras loose out on the shadow detail, if you watch Techtronic9000's comparison video of the Yi 4K and Git2 then you see the difference easily - he shows that the Git2 has better dynamic range, if the Yi gets good exposure for the sky then there is no detail in the shadows, the Git2 can manage both at the same time but with less accuracy, there is a trade off between the two. Personally, like TT9000, I prefer the Git2. The GoPro Hero 4 is similar to the Yi 4K.
The only good solution we are going to get for the Git2 is to do what photographers have always done and make good use of the exposure settings - Exposure, EV+-, EV lock, choose a location with good lighting, choose a time of day with good lighting conditions, etc. If you want good image quality for the sky then set the correct exposure for the sky, but of course you will loose detail in the shadows by doing so, with current technology it is not always possible to have correct exposure for everything at the same time, it never has been possible, not even our eyes can do it - look at the sky and your eyes adjust to the brightness of the sky, look at the shadows and they adjust to the brightness of the shadows, they can't manage both at the same time, so why expect a photo/video to be able to do both at the same time?
Yeah, I see the same poor sky gradient in Git2 videos. No problems in Raw photo. So, it is video color profile thing.
It also happens with jpg photos, it is the conversion from the 12 bit colour of the sensor to the 8 bit jpg/H264 format that causes the issue and is handled differently by different brands of processor. When we get H265 or AV1 12 bit video and 12 bit monitors/TVs the video will be as good as the raw photos, until then we are stuck with 8 bit video (only 256 different levels of each colour) which makes these problems a lot more visible.
In the last video I posted, there are two segments,
- In the first segment I forgot to press the Exposure lock so it shows this problem, the sky starts off blue, as the train passes the sky turns over exposed white, and as the train leaves the sky goes blue again.
- In the second segment I did press the exposure lock, and because I wanted to see the detail of the train and I knew that it would be in shadow, I deliberately locked the exposure with the sky over exposed, this time as the train passes nothing changes in the sky, the sky is not good quality but it was the train that I wanted. It would have been better to have been the other side of the train so that it was not in shadow, then I could have had an OK exposure for the sky but that was not possible without a helicopter (a drone would have been illegal).
So think about your exposure settings, location, lighting, time of day etc before pressing the record button and you can get significantly better video.
This isn't exactly great quality, but at least the train is not just a dark silhouette against a bright sky, with a Yi 4K it probably would be!
