Question / Help Twitch 1080p/60 Threadripper 1950x Quality

darealal

darealal

New Member
Hi there...

I have a 2PC Setup. Encoder is a Threadripper 1950X, oc @4ghz, 32GB DDR4/3200, CaptureCard is Elgato HD60pro.

As long as there is only slow movement, the picture is perfect but as soon as something moves faster, there are these
nasty artifacts. See the VOD at https://www.twitch.tv/videos/274987623
The setings are CBR, Bitrate 8000, Buffer 2500 (tested with 0 as well), Keyframe Interval 2, Encoding Slow, Profile main, x264 Options threads=27
Logfile is at httpsd://hastebin.com/oqokegusap

I think it should be possible to get a way more better quality with 8MBit, right ? Any ideas ?
 
From what I know your bitrate should be at/around 2500 not 8000. That's probably where your freezing came. Try lowering it and see if that helps.
 
Thank you for your answer. The 'suggested' rate is 6000 but its not a problem to go higher ;) And as you can see, if u check the VOD, there is no lag or choppyness... Its just bad quality while moving faster.
 
You need more bitrate then that to make 1080p 60fps look good. Messing around with a custom buffer isn't helping either.
 
Sorry for the bad description... I tested tons of settings, i just mentioned the buffer coz the 'default' is auto. And i've seen a lot of streams looking way better with only 6000... Your turn ;)
Oh, an btw... iirr this https://www.twitch.tv/videos/274717778 is just another game with (nearly) the same settings.
 
Looks completely normal to me. 1080p 60fps can look "very nice" with 8000kbps, as long as the content can be compressed efficiently.
No/slow movement, bigger areas with low details or no movement etc.
It can also look very pixelated/blurry on content, that can not be compressed very efficiently.

That's why GTA is way more bitrate hungry during movement, than the second example (Jurassic World). In the second clip, there are very slow movements at first and at the end, there is a lot of moving grass on the ground (bitrate hungry), but the sky has no details at all, so the whole sky can be compressed very good, which saves bitrate for more critical areas.
In your GTA clip, there are way more pixels in motion (texture on the street, objects on/next to the street but also buildings in the distance and a few details in the sky).

I highly recommend this blog entry from OBS, including the great video from Tom Scott:
https://obsproject.com/blog/streaming-with-x264
 
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