Dear colleagues and movie experts, I have SJCAM SJ7 STAR and now... Full HD shooting is great, but there is an issue with 4K recording... Specifically, I want to crop the part (a quarter) of the 4K video in Full HD format but it doesn't look OK, it is not a Full HD, there are pixelization and noise in the video... I'm not happy, that's not it. I know it should be much better. I look forward to your professional opinion, thank U. Why is that so, and what I have to do?