Question / Help OBS washed reds on LoL (minion bar)

Krazy

Krazy

Town drunk
This is actually normal, I think. It has something to do with sampling and encoding, I'm not entirely sure on the specifics, but reds tend to be a problem color. There's not really any way around this, I think.

http://blogs.adobe.com/VideoRoad/2010/0 ... _is_4.html

That might give a better idea of what's going on, since things are converted somewhere in the capturing/encoding process into 4:2:0 and thus losing some color depth.

Anyone is more than welcome to correct me if I'm in error, I don't wish to spread false or incomplete information.
 
P

Pugget

Twitch
KrazyTrumpeter is on-point. It doesn't matter how high your bitrate is, I'd bet my arm that all the video OBS sends is encoded in 4:2:0. 4:2:0 allows x264 and other video codecs to save huge amounts of space while keeping the perceptual visual quality high. Of course, doing direct comparisons to the source is always somewhat revealing as to what tricks are being played. Whatever you do, don't compare all those BlueRays/DVDs with the original source - the color is changed in the exact same way it is here. :D
 
N

Nintendork

New Member
Thx for the answers guys. Now I can stop hitting myself with the doubts. One thing i noted is that when I resize the output to -1.5x it actually fixes those red colors.

Can I do something with the "custom x264" option?
 
P

Pugget

Twitch
The thing with color sub-sampling is that size can matter. Shrinking the size of the window will align the samples with the source differently, and less or more color aliasing will take place.

I'd bet there is a way to change the way color is being sub-sampled, but I don't suggest it. Forcing anything expect 4:2:0 is going to dramatically lower the quality of your steam, as more bandwidth will have to be spent on color, raising quantization values dramatically.
 
Krazy

Krazy

Town drunk
There is in one of the ini files somewhere, but it doesn't seem to work. I couldn't tell if it was the app not actually supporting stuff like that yet, or something in the twitch player settings. But really, there's not a ton of need for it because of the issues Pugget mentioned.
 
M

Muf

Forum Moderator
Yeah, Jim has experimented with 4:4:4 chroma sampling in a test build, but Flash Player doesn't support it. You just get a black screen.
 
N

Nintendork

New Member
Pugget said:
The thing with color sub-sampling is that size can matter. Shrinking the size of the window will align the samples with the source differently, and less or more color aliasing will take place.

I'd bet there is a way to change the way color is being sub-sampled, but I don't suggest it. Forcing anything expect 4:2:0 is going to dramatically lower the quality of your steam, as more bandwidth will have to be spent on color, raising quantization values dramatically.
Click to expand...

I would like to have the better quality for my youtube channel (use file output to hard drive, then upload it to youtube).
 
You must log in or register to reply here.
Top