YouTube Changing Contrast of Video?

Comments

Musicvid wrote on 4/22/2020, 8:02 PM

@adis-a3097

[sigh /]

;?)

adis-a3097 wrote on 4/22/2020, 8:38 PM

Here's little something:

https://drive.google.com/file/d/1piYIGaKamryy_DmKkVKEHwxywjzH5T7d/view?usp=sharing

To whom it may concern: if you set up your MPC/VLC player correctly, in first clip (1-Black Clipping) 17-25 should be flashing. 16 is black, it doesn't flash. In second (2-APL Clipping) 17-28 and 223-234 should flash. 235 is white, it doesn't flash. In third (3-White Clipping), 230-234 is flashing. 235 doesn't. It's white. If you put blue sunglasses on (blue filter) nothing flashes in fourth clip. :)

Now, in Vegas: everything's flashing! 😂

Don't worry, it's perfectly fine. :)

Howard-Vigorita wrote on 4/23/2020, 9:44 PM

@adis-a3097 Just want to make sure I'm approaching this as intended. I calibrated through Win10 (control panel, color management, advanced, calibrate display) which gives a reasonably ok look. In MPC-HC x64 v1.7.13 I played clip 1 adjusting brightness and clip 2 adjusting contrast under misc options. Futzed with those 2 until clip 3 looked as described. Ended up with brightness +6 and contrast -3 and applied to save it in MPC. Does that sound right? (My cheap sun-glasses are not blue so I could not check clip 4. ) Or should I be doing this tweaking so it ends up in the Windows calibration profile and save it there?

adis-a3097 wrote on 4/24/2020, 7:56 AM

@adis-a3097 Just want to make sure I'm approaching this as intended. I calibrated through Win10 (control panel, color management, advanced, calibrate display) which gives a reasonably ok look. In MPC-HC x64 v1.7.13 I played clip 1 adjusting brightness and clip 2 adjusting contrast under misc options. Futzed with those 2 until clip 3 looked as described. Ended up with brightness +6 and contrast -3 and applied to save it in MPC. Does that sound right? (My cheap sun-glasses are not blue so I could not check clip 4. ) Or should I be doing this tweaking so it ends up in the Windows calibration profile and save it there?

Actually, you shouldn't be tweaking anything, everything should look ok by default. Maybe your monitor is set with too much contrast, so it clips the highlights and crashes shadows.

Can you take a snapshot from MPC player (Alt+I) save it as a .jpg and upload to the forum?

Musicvid wrote on 4/24/2020, 9:49 AM

And turn off Dynamic Contrast in your player, graphics and monitor!

Howard-Vigorita wrote on 4/24/2020, 2:49 PM

Actually, you shouldn't be tweaking anything, everything should look ok by default. Maybe your monitor is set with too much contrast, so it clips the highlights and crashes shadows.

@adis-a3097 Ha, ha, in a perfect world the TV I'm using as a monitor where I'm staying at the moment would not need calibration. Winging it without my xrite and BenQ back home. But I think you're right... makes sense for the calibration to affect everything, not just mpc. I transferred the adjustments from mpc into the monitor then calibrated over again with Win10 using only the gamma adjustment. Then re-adjusted with the clips and the monitor.

LongIslander wrote on 4/24/2020, 4:47 PM

VLC plays all the clips incorrectly; MPC plays them back correctly.

adis-a3097 wrote on 4/24/2020, 5:59 PM

Actually, you shouldn't be tweaking anything, everything should look ok by default. Maybe your monitor is set with too much contrast, so it clips the highlights and crashes shadows.

@adis-a3097 Ha, ha, in a perfect world the TV I'm using as a monitor where I'm staying at the moment would not need calibration. Winging it without my xrite and BenQ back home. But I think you're right... makes sense for the calibration to affect everything, not just mpc. I transferred the adjustments from mpc into the monitor then calibrated over again with Win10 using only the gamma adjustment. Then re-adjusted with the clips and the monitor.

Eeeek, a teevee? Kill it! Kill it fast! 😂

Wait, are you adjusting gamma just by eyeballing? Without a probe?

Here:

This is good enough for eyeballing.

Download. Open, and don't resize (if you do it won't work). Take a step back from your monitor and you'll see colors kinda merging "into each other" at the height of 2.2 mark (don't know how else to describe it) - if everything is ok. If not, then compensate. Don't touch gamma in Windows or in video card panel, do it on monitor!

 

Edit:

Oh, I just realized you're at your TV, not PC monitor. :facepalm:

Scrap that gamma test, it won't work on TV. With TV connected, a PC spits out an YCbCr signal which messes up the RGB content of that picture I posted. Unless...you have a RGB (PC) mode on your TV?

Should work for everybody else with PC monitor though.

Also edit:

What Musicvid said! +10

Musicvid wrote on 4/24/2020, 6:06 PM

Adobe Gamma and Calibrize are basic monitor calibration tools that work acceptably with a trained pair of eyes. @Howard-Vigorita says he has an xrite, and that is the preferred method. An old (cheap) Colorvision Spyder 2 is serviceable, thus my tutorial last winter.

https://www.vegascreativesoftware.info/us/tutorials/monitor-calibration-on-the-cheap-with-spyder2-pro--118473/

adis-a3097 wrote on 4/24/2020, 6:10 PM

VLC plays all the clips incorrectly; MPC plays them back correctly.

Does VLC match Vegas's preview window?

LongIslander wrote on 4/28/2020, 11:10 PM

 

It's the other way round: what's shot in 0-255 needs correction so it doesn't get clipped/truncated by VLC/MPC/YouTube player. Yes, it does show correctly in Vegas's preview window but that's about it.

BTW, it's the iPhone video that's 16-235 (which doesn't need correction), not that of the GoPro. :)

 

Perfect. Thank You.