Question / Help Max keyframe interval change to 2.

H

hazrdcubby

New Member
Hey Guys,

Twitch apparently will be requiring different things now in order for your stream to be viewed on different devices or to be viewed period.

Can somebody let me know how to change the Max keyframe interval to 2. It currently says Max keyframe interval is currently at 8.489 seconds. Please set it to 2 seconds. Without changing it to 2 starting September 1st nobody on Consoles or Phones will be able to view it.

From what i've read you have to go to Advanced Setting and Customer Encoder Setting. I just don't know what to put. Thanks.
 
R

R1CH

Forum Admin
Developer
That guide is wrong, it's keyint=x not -keyint X in the advanced x264 settings. There will be an updated OBS release with a UI option to set the keyframe interval soon, so you could wait for that instead.
 
W

Woubie

New Member
R1CH said:
That guide is wrong, it's keyint=x not -keyint X in the advanced x264 settings. There will be an updated OBS release with a UI option to set the keyframe interval soon, so you could wait for that instead.
Click to expand...

So under Advanced > Custom x264 Encoder Settings


You would put keyint=120 for 60fps?
 
R

R1CH

Forum Admin
Developer
Yes. Twitch seems really strict about this though, even matching FPS*2 exactly it will still sometimes show that warning. It's probably safe to ignore until they improve the stream quality checker.
 
W

Woubie

New Member
R1CH said:
Yes. Twitch seems really strict about this though, even matching FPS*2 exactly it will still sometimes show that warning. It's probably safe to ignore until they improve the stream quality checker.
Click to expand...
Yes it says my quality is incompatible now, ill just wait.
 
A

amota92

New Member
R1CH said:
Yes. Twitch seems really strict about this though, even matching FPS*2 exactly it will still sometimes show that warning. It's probably safe to ignore until they improve the stream quality checker.
Click to expand...
Do you know or can you give an estimate on the date of the update?
 
T

tmosm

New Member
I got my settings all sorted and Twitch said it was "excellent". Thought i would check the replay of the test to find out it had actually ruined my quality. Looked so bad, so i have gone back to my settings before twitch brought this thing in.

So my advice is not to worry about it too much right now. A long time till the 31st :)
 
U

Ulfver

New Member
tmosm said:
I got my settings all sorted and Twitch said it was "excellent". Thought i would check the replay of the test to find out it had actually ruined my quality. Looked so bad, so i have gone back to my settings before twitch brought this thing in.

So my advice is not to worry about it too much right now. A long time till the 31st :)
Click to expand...



A moderator asked exactly how the quality was ruined. As I have also had the same experience after changing my key frame interval from default to 2 I will answer. Twitch now says quality is "excellent" however my image now looks very blotchy or blurry. I looks like there a blurry squares all throughout.
 
K

Kharay

Member
Are you streaming at a (very) low bitrate? Because at (very) low bitrates there may be some quality loss indeed. However, when experimenting with it at common bitrates I noticed no noticeable quality loss of any kind. Dota 2 at 2880 Kbps looks just fine with the new requirements.
 
T

tmosm

New Member
Krazy said:
How exactly was your quality ruined?
Click to expand...

I got it fixed, although twitch seems very random on accepting its correct. Every refresh changes what my rating is so i guess the twitch system isnt that stable at this time.
 
M

Maelas

Member
Hello,

Can someone explain to me why we have to set this x264 setting? What does it do for the quality of the stream? Is it some sort of config that allows mobile users to view the stream effectively?

Thanks
 
K

Kharay

Member
Why we have to do it? Because Twitch demands it. What does it do for the quality of the stream? Nothing much unless you're streaming at very low bitrates. As far as your last question is concerned -- well, yes, it may in fact improve stream compatibility with mobile devices. At least, Twitch seems to think it does as it is one of their main reasons to be more strict like this.
 
M

Maelas

Member
Ok, ill mess with it and see if i can get the right setting for it. I take it since i stream at 30fps i would use "keyint=60" hence the *2 framerate?

Thanks
 
dodgepong

dodgepong

Administrator
Community Helper
Setting the keyframe interval to 2 helps with HLS, which is the delivery method that Twitch is moving toward instead of RTMP. It has several advantages, including better support for mobile, and will allow features in the future like DVR functionality.
 
M

Maelas

Member
Am i right though about the setting for the x264 option? Im assuming the X keyint=X represents * 2 of the fps i have currently set in obs?

Thanks
 
dodgepong

dodgepong

Administrator
Community Helper
Yes, but actually if you use the new version of OBS that was just released, you can just enter 2 seconds into the keyint field and not have to mess with custom x264 settings.
 
M

Maelas

Member
Thanks very much for the helpful info. I just received the update this morning and have done just that. Ill run some tests to see if anything is affected but i dont expect anything will be.

Thank You
 
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