Hi. Have you noticed the problem which can be seen in the linked video? It's 4k 60fps HDR footage recorded by brand new 13 Pro Max. The problem is the "grainy"(?) effect visible for example on the earth (left side) or road after fast moving the camera. Not sure if it's software (iOS 15.4) or hardware related issue. When I turn off "HDR video" in settings, the problem seems to disappear. Any thoughts or does it exist on your 13 Pro / Max? Trying to google it, but haven't found anything interesting :c
Actually I can confirm this! From the very first day after purchasing the 13 Pro i noticed the grainy effect in 4k 60fps HDR video recordings. I have bad news for you: this "grain" or noise is actually... video compression artifacts. The same ones you get with bad quality JPG files.
Just take a look at this closeup screenshots of 4k 60fps HDR-ON and 4k 60fps HDR-OFF:
The compression and quality loss is clearly visible on the left.
I think there are two possibilities:
a) iPhone 13 Pro is not powerful enough to maintain stable 4k 60fps with HDR ON, so Apple had to implement a lot of compression to make it even possible.
b) this is purely software shortcoming which can be fixed with next ios update - HOPEFULLY THAT'S THE CASE
What's interesting is that if you lower fps to 30 and keep 4k and HDR ON, those compression artifacts are gone! So the problem is only with 4k 60fps HDR ON. This proves that this grainy effect is a result of compression, which Apple implemented to be able to show off with 4k 60fps Dolby Vision videos. Nevertheless the quality loss is visible especially in darker areas, trees, grass and other tiny objects. Also I noticed that artifacts are the most visible while camera is moving.
Yesterday I talked on the phone with Apple Support and to them this is something new. Of course they wanted screenshots and everything but their response was that probably my iPhone is faulty, or perhaps the backup file was corrupted and some software errors were copied from older iPhone. I don't buy it at all. They said that only because there are no similar reports from other iPhone users.
Please make your own screenshots and make an appointment with Apple Support to get a phonecall. Provide them with your screenshots. Only if there are more of us we can make Apple admit that the problem is there in every iPhone 13 Pro/Pro Max. And only if there are more of us, there is a chance they will do something about it and at least try to fix it in next updates.
PS. I even made a topic on this on discussions.apple.com:
discussions.apple.com
PS2:Also there is another problem with overexposure with 13 Pro videos which I also reported and here you can see the topic:
discussions.apple.com