Question / Help Stream gets pixelated

D

DonCapello

New Member
Hello!

I recently started using OBS, and my viewers mentioned a problem, that my stream picture gets pixelated in nearly any movement actions, no matter if I do screen capture (in borderless windowed mode - League of Legends, Smite), or game capture (Assassin's Creed 3). When I used XSplit, I had none of these troubles, so probably it's something about the settings, however I have no clue what to change.

You can witness the pixelization what I'm talking about at 9:30 on this replay: http://en.twitch.tv/doncapello/b/345776939

My PC specs:

AMD FX8150 3.6 GHz
8GB RAM
MSI HD7850 1GB OC

My stream settings:

Quality balance: 8
Max bitrate/buffer: 1200
Audio: AAC/128 bitrate

Video: custom, 1280x720 (native resolution is 1080p)
Resolution downscale: none
FPS: 40

Multithread Optimizations: on
Preset: veryfast
Send buffer size: 11680

My internet speed:

2355547254.png


Any helpful ideas are very welcome, thank you. :)
 
R1CH said:
Please post a log.
Click to expand...

As you requested:

Code: 
Open Broadcaster Software v0.449a [test 4] - 32bit (´・ω・｀)
-------------------------------
CPU Name: AMD FX(tm)-8150 Eight-Core Processor
CPU Speed: 3616MHz
Physical Memory:  4095MB Total, 4095MB Free
stepping id: 2, model 1, family 15, type 0, extmodel 0, extfamily 3, HTT 1, logical cores 8, total cores 4
------------------------------------------
Adapter 1
  Video Adapter: AMD Radeon HD 7800 Series
  Video Adapter Dedicated Video Memory: 1051922432
  Video Adapter Shared System Memory: 4017156096
=====Stream Start=====================================================================
  Multithreaded optimizations: On
  Base resolution: 1280x720
  Output resolution: 1280x720
------------------------------------------
Loading up D3D10...
------------------------------------------
Using auxilary audio input: Mikrofon (VIA High Definition Audio)
------------------------------------------
Audio Encoding: AAC
    bitrate: 128
------------------------------------------
  Using audio/video sync fix
Using custom x264 settings: "vbvmaxrate=1200"
------------------------------------------
Video Encoding: x264
    fps: 40
    width: 1280, height: 720
    preset: veryfast
    CBR: no
    max bitrate: 1200
    buffer size: 1200
    quality: 8
------------------------------------------
Warning -- MMDeviceAudioSource::GetBuffer: got a discontinuity flag.  device = Hangszórók (VIA High Definition Audio)
Warning -- MMDeviceAudioSource::GetBuffer: got a discontinuity flag.  device = Mikrofon (VIA High Definition Audio)
Total frames rendered: 847, number of frames that lagged: 127 (14.99%) (it's okay for some frames to lag)
=====Stream End=======================================================================
=====Stream Start=====================================================================
  Multithreaded optimizations: On
  Base resolution: 1280x720
  Output resolution: 1280x720
------------------------------------------
Loading up D3D10...
------------------------------------------
Using auxilary audio input: Mikrofon (VIA High Definition Audio)
------------------------------------------
Audio Encoding: AAC
    bitrate: 128
------------------------------------------
  Using audio/video sync fix
Using custom x264 settings: "vbvmaxrate=1100"
------------------------------------------
Video Encoding: x264
    fps: 40
    width: 1280, height: 720
    preset: veryfast
    CBR: no
    max bitrate: 1200
    buffer size: 1200
    quality: 8
------------------------------------------
Warning -- MMDeviceAudioSource::GetBuffer: got a discontinuity flag.  device = Hangszórók (VIA High Definition Audio)
Warning -- MMDeviceAudioSource::GetBuffer: got a discontinuity flag.  device = Mikrofon (VIA High Definition Audio)
SO_SNDBUF was at 8192
Send Buffer Size: 11680
bufferTime: 2740, outputRateWindowTime: 1000, dropThreshold: 3340
using shared texture capture
Total frames rendered: 36614, number of frames that lagged: 3045 (8.32%) (it's okay for some frames to lag)
Number of b-frames dropped: 0 (%0), Number of p-frames dropped: 0 (%0), Total 0 (%0)
=====Stream End=======================================================================

Profiler results:

==============================================================
frame - [100%] [avg time: 13.801 ms] [avg calls per frame: 1] [children: 85.9%] [unaccounted: 14.1%]
| scene->Preprocess - [53.9%] [avg time: 7.445 ms] [avg calls per frame: 1]
| video encoding and uploading - [32%] [avg time: 4.413 ms] [avg calls per frame: 1] [children: 11.2%] [unaccounted: 20.7%]
| | CopyResource - [0.13%] [avg time: 0.018 ms] [avg calls per frame: 0]
| | conversion to 4:2:0 - [0.0435%] [avg time: 0.006 ms] [avg calls per frame: 0]
| | call to encoder - [11.1%] [avg time: 1.528 ms] [avg calls per frame: 0]
==============================================================

Memory Leaks Were Detected.
 
Seems ok, you should probably use a higher bitrate if you want better quality. 1200k for 40 fps 720p is pushing it a bit. You should also make sure to use the latest version, and remove your custom x264 settings.
 
experiment with the quality Setting i use 6 at 1920x1200 with 3500 bitrate if i got over 6 with quality it gety pretty pixelated on high movement. ohh and use 30 fps, doesen't make much difference but saves you bandwidth! so it positively affects your pixelation issue too.
 
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