This started happening for me this evening a few hours ago I watched UA-cam videos that were all normal brightness but as of about 8:00 p.m. this evening UA-cam videos are now at about 70% brightness I thought my tablet battery was low but it's at 100% so it's not causing the dimming and the UA-cam logo and all my tabs are nice and bright it's just the client area of the browser with the comments text and video that are dim and this is on full videos not on UA-cam shorts those are still at normal brightness.
I think this may be some attempt to get less blue light into people's eyes at night. It actually is causing a host of issues for society. Disrupted sleep is the major issue, however it has also been found that children exposed to a constant barrage of blue light experience hormonal activity outside of the natural norm, which in some cases delays or accelerates processes like puberty or brain development. Serious issue.
Hello, if you are watching You tube on a smartphone and the screen dims, press both sides of the screen with your thumbs then slide them away from each other, the screen dimming will stop. Hope that helps😊
yea noticed that too, my gameplay videos used to have this 1;1 hdr pop now when I compare uploaded hdr content vs one that uploaded but still on pc running in hdr its like night and day that its sad. Anyone figured out whats up with that and how to combat this?
Super niche video but I have noticed this over time and I just thought it was my editing computer monitor vs the TV I view the videos on that caused the difference. How about that! Very frustrating
One of UA-cam's engineers (Steve Robertson) mentioned they were going to do this in a talk, though in my testing it hasn't affected any HDR content I've produced. I wonder if it's triggered if your MaxFALL is past a certain threshold, likely attempting to solve some smartphone HDR sources that use extremely bright viewing environment variables. ua-cam.com/video/bYS-P2bF2TQ/v-deo.html I noticed in your example you ramped to 10,000 nits. Did you also set MaxCLL to 10,000?
Update: After discussing on Discord this likely comes down to Chrome either performing tonemapping based on MaxCLL, or sending the MaxCLL data to the OS hardware decoding / UI draw APIs or external displays which then perform tonemapping. This is intended behavior, though they are always tweaking how this is done (especially to still images as those standards are under heavy development). The actual video file on UA-cam if downloaded via yt-dlp has the original PQ encoding unchanged. There should be little to no tonemapping if MaxCLL is below the currently available headroom threshold for the display (depends on the user's current brightness settings). You should always set the MaxCLL and MaxFALL accurately, as there will be further changes to implementations down the road for computers & displays. There's a reason even many Hollywood films currently don't push much past 400-1000 nits (at reference brightness level). On macOS machines you can also put the display in reference mode where it will not perform any tonemapping which Chrome respects (clips anything beyond the headroom).
The peak on UA-cam seems to depend on the stated MaxCLL in the metadata (not the ACTUAL max luminance). I've found that mastering a video with a peak brightness of 1000 nits and a MaxCLL of 1000 as well results in a peak brightness on UA-cam of 600-700 nits. At least in the cases I tested
@@JonPais UA-cam dims videos. Period. You can do simple test yourself, record a gameplay, upload it on YT and after it gets processed to hdr open that video in browser and open source material on pc and see the mindblowing difference. They lack this hdr pop at all
I freaking KNEW IT!!!! Thought I was losing my mind
Yeah I thought about it why every HDR looks dim
This is just happening to me right now, but not HDR it seems. It's all videos, and randomly. Im also losing ui controls.
This only happened to me today and i too lose control over UI
My screen goes dim while watching YT videos, if I brighten my screen then everything else is too bright. So annoying...
Adjust the brightness in settings
This started happening for me this evening a few hours ago I watched UA-cam videos that were all normal brightness but as of about 8:00 p.m. this evening UA-cam videos are now at about 70% brightness I thought my tablet battery was low but it's at 100% so it's not causing the dimming and the UA-cam logo and all my tabs are nice and bright it's just the client area of the browser with the comments text and video that are dim and this is on full videos not on UA-cam shorts those are still at normal brightness.
I think this may be some attempt to get less blue light into people's eyes at night.
It actually is causing a host of issues for society. Disrupted sleep is the major issue, however it has also been found that children exposed to a constant barrage of blue light experience hormonal activity outside of the natural norm, which in some cases delays or accelerates processes like puberty or brain development.
Serious issue.
@@peachmelba1000 in my case, I found that restarting my browser fixed the dimming issue.
For me hdr videos just forces my brightness up to max
Hello, if you are watching You tube on a smartphone and the screen dims, press both sides of the screen with your thumbs then slide them away from each other, the screen dimming will stop. Hope that helps😊
@RoamingWalker. This is what I am mentioning about HDR Videos in UA-cam. Hope this helps. 😊
yea noticed that too, my gameplay videos used to have this 1;1 hdr pop now when I compare uploaded hdr content vs one that uploaded but still on pc running in hdr its like night and day that its sad. Anyone figured out whats up with that and how to combat this?
Super niche video but I have noticed this over time and I just thought it was my editing computer monitor vs the TV I view the videos on that caused the difference. How about that! Very frustrating
wow this is a big key thanks bro
Volume button press it's normally play
OMG. Thanks for posting this
One of UA-cam's engineers (Steve Robertson) mentioned they were going to do this in a talk, though in my testing it hasn't affected any HDR content I've produced. I wonder if it's triggered if your MaxFALL is past a certain threshold, likely attempting to solve some smartphone HDR sources that use extremely bright viewing environment variables. ua-cam.com/video/bYS-P2bF2TQ/v-deo.html
I noticed in your example you ramped to 10,000 nits. Did you also set MaxCLL to 10,000?
Update: After discussing on Discord this likely comes down to Chrome either performing tonemapping based on MaxCLL, or sending the MaxCLL data to the OS hardware decoding / UI draw APIs or external displays which then perform tonemapping. This is intended behavior, though they are always tweaking how this is done (especially to still images as those standards are under heavy development).
The actual video file on UA-cam if downloaded via yt-dlp has the original PQ encoding unchanged.
There should be little to no tonemapping if MaxCLL is below the currently available headroom threshold for the display (depends on the user's current brightness settings).
You should always set the MaxCLL and MaxFALL accurately, as there will be further changes to implementations down the road for computers & displays.
There's a reason even many Hollywood films currently don't push much past 400-1000 nits (at reference brightness level).
On macOS machines you can also put the display in reference mode where it will not perform any tonemapping which Chrome respects (clips anything beyond the headroom).
Hey, do you know of any overlay tool that'll allow me to see the peak brightness of anything on the display? I.e. a heatmap or similar.
I can't quite tell. Is that roughly 400nits peak?
The peak on UA-cam seems to depend on the stated MaxCLL in the metadata (not the ACTUAL max luminance).
I've found that mastering a video with a peak brightness of 1000 nits and a MaxCLL of 1000 as well results in a peak brightness on UA-cam of 600-700 nits. At least in the cases I tested
@@VideoTechExplainedUA-cam does not dim videos, least of all based on MaxCLL. TVs are what do the tone mapping, not the streaming service.
@@JonPais UA-cam dims videos. Period. You can do simple test yourself, record a gameplay, upload it on YT and after it gets processed to hdr open that video in browser and open source material on pc and see the mindblowing difference. They lack this hdr pop at all
@@SidorovichJr If it’s dimming, it’s because you have no idea what you’re doing.