@Alyosha2001
@ryans
@JTL
@Lauda89
Hi guys, do you remember this thread?
I finally got to recording the videos, I can confirm I can sport the problem on a "bad" system even when recorded in the video, although it still differs from looking directly at a monitor connected to such a system (it feels worse there), but the issue can be perceived even in the video.
I already found something extremely interesting but I may need some help here as this may be a result of video compression or something similar. But it would still be weird as I thought that video compression is more trying to smooth things out, like similar = the same etc. (if you know what I mean), I really wonder why a compression would produce such an effect - if two pictures are remotely similar, compression should be trying to make them look the same to save space, but again I am no expert on lossy video compression (which MP4 is).
I already extracted the first second of the videos frame by frame using ffmpeg (output format BMP) and compared two neighboring images using imagemagick (compare). The videos capture a menu screen of the Saurian game, it should theoretically be completely static, there is nothing happening in the menu.
The sample picture of the menu is here:
The diff of two neighboring frames on a system that is OK for me (although NOT perfect, I can still feel some minor instability there):
And now the picture on the "bad' system:
Now what do you make of it? Almost looks like some form of code 🙂 The differences are mostly where there is some picture, it appears only sporadically on white spaces (but it does!). I would really tend to believe it is some video compression side effect, but why would this exist? And look at the shapes, really weird… What is also notable is that an almost good system has very few of these shapes… while the bad system has plenty. It may be some form of noise, but if it is then this could be exactly what is bothering us. I also tried to make more diffs, the result is roughly very similar, each diff is different in terms of these shapes, but there is a similar amount of these shapes and their representation on each diff.
Recordings were done with Geforce experience using High quality on both systems, I may further increase the quality beyond High if needed. Imagemagick comparison is obviously doing its job as comparing two same images produced all white output.
I can upload the original videos if you're interested, it might be good to see if others will get the same results using different tools than ffmpeg and imagemagick. But perhaps even better - if someone could try to make their own similar recordings on bad systems.