Question / Help OBS and GPU usage

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fevion

New Member
Hi. I'm building a dedicated streaming machine with some spare parts I have, but i lack of a GPU. My build right now is:

CPU: i5-2500k
Ram: 16GB 1333Mhz
HD: 1TB 7200 RPM
Alim: EVGA GOLD 750w

Capture card: ELGATO HD60 Pro

Internet: Download 65 mb/s / Upload 25 mb/s

I tryed using OBS with only this comp but the stream stutter continuously cause no GPU (CPU never exceed 70% usage, 0 frames lost).

My question is: do I need a super cheap GPU? Or do I need a good GPU or even better?

For example a GTX 750 mini with 1GB vRam will be fine for streaming and recording at the same time? Or I need a stronger one? I can't find out how much powerful a GPU have to be.

Thank you very much
 
Sapiens

Sapiens

Forum Moderator
The GPU is still used for scene compositing and still needs to be DX 10.1-capable. If the iGPU on your 2500K is getting maxed out (use a tool like GPU-Z to determine if this is the case) you may want to throw a low-end discrete GPU in there. A log file would also be useful in diagnosing the issue.
 
F

fevion

New Member
Sapiens said:
The GPU is still used for scene compositing and still needs to be DX 10.1-capable. If the iGPU on your 2500K is getting maxed out (use a tool like GPU-Z to determine if this is the case) you may want to throw a low-end discrete GPU in there. A log file would also be useful in diagnosing the issue.
Click to expand...

I'm enough sure that the iGPU is super saturated.

Here my last log file:

Code: 
19:38:30.954: CPU Name: Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz
19:38:30.955: CPU Speed: 3293MHz
19:38:30.955: Physical Cores: 4, Logical Cores: 4
19:38:30.955: Physical Memory: 16285MB Total, 14674MB Free
19:38:30.955: Windows Version: 10.0 Build 14393 (revision: 693; 64-bit)
19:38:30.955: Running as administrator: true
19:38:30.955: Aero is Enabled (Aero is always on for windows 8 and above)
19:38:30.955: Portable mode: false
19:38:30.983: OBS 18.0.1 (64bit, windows)
19:38:30.984: ---------------------------------
19:38:30.984: ---------------------------------
19:38:30.984: audio settings reset:
19:38:30.984:     samples per sec: 48000
19:38:30.984:     speakers:        2
19:38:30.985: ---------------------------------
19:38:30.985: Initializing D3D11..
19:38:30.985: Available Video Adapters:
19:38:30.987:     Adapter 1: Intel(R) HD Graphics 3000
19:38:30.987:      Dedicated VRAM: 33554432
19:38:30.987:      Shared VRAM:    1711276032
19:38:30.987:      output 1: pos={0, 0}, size={1920, 1080}, attached=true
19:38:30.990: Loading up D3D11 on adapter Intel(R) HD Graphics 3000 (0)
19:38:31.014: D3D11 loaded sucessfully, feature level used: 41216
19:38:31.851: ---------------------------------
19:38:31.851: video settings reset:
19:38:31.851:     base resolution:   1920x1080
19:38:31.851:     output resolution: 1280x720
19:38:31.851:     downscale filter:  Bicubic
19:38:31.851:     fps:               30/1
19:38:31.851:     format:            NV12
19:38:31.851: Audio monitoring device:
19:38:31.851:     name: Default
19:38:31.851:     id: default
19:38:31.851: ---------------------------------
19:38:31.856: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/chrome_elf.dll' not found, loading of module failed
19:38:31.857: [CoreAudio encoder]: CoreAudio AAC encoder not installed on the system or couldn't be loaded
19:38:31.859: [AMF Encoder] Unable to load 'amfrt64.dll', error code 126.
19:38:31.891: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libcef.dll' not found, loading of module failed
19:38:31.891: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libEGL.dll' not found, loading of module failed
19:38:31.892: Required module function 'obs_module_load' in module '../../obs-plugins/64bit/libGLESv2.dll' not found, loading of module failed
19:38:31.892: Failed to load 'en-US' text for module: 'obs-browser.dll'
19:38:31.892: [browser_source: 'Version: 1.29.0']
19:38:31.894: LoadLibrary failed for 'nvEncodeAPI64.dll': (null) (126)
19:38:31.985: Couldn't find VLC installation, VLC video source disabled
19:38:31.987: No blackmagic support
19:38:32.050: ---------------------------------
19:38:32.050:   Loaded Modules:
19:38:32.050:     win-wasapi.dll
19:38:32.050:     win-mf.dll
19:38:32.050:     win-ivcam.dll
19:38:32.050:     win-dshow.dll
19:38:32.050:     win-decklink.dll
19:38:32.050:     win-capture.dll
19:38:32.050:     vlc-video.dll
19:38:32.050:     text-freetype2.dll
19:38:32.050:     rtmp-services.dll
19:38:32.050:     obs-x264.dll
19:38:32.050:     obs-vst.dll
19:38:32.050:     obs-transitions.dll
19:38:32.050:     obs-text.dll
19:38:32.050:     obs-qsv11.dll
19:38:32.050:     obs-outputs.dll
19:38:32.050:     obs-filters.dll
19:38:32.050:     obs-ffmpeg.dll
19:38:32.050:     obs-browser.dll
19:38:32.050:     image-source.dll
19:38:32.050:     frontend-tools.dll
19:38:32.050:     enc-amf.dll
19:38:32.050:     coreaudio-encoder.dll
19:38:32.050: ==== Startup complete ===============================================
19:38:32.051: All scene data cleared
19:38:32.051: ------------------------------------------------
19:38:32.080: WASAPI: Device 'Cuffie (Dispositivo High Definition Audio)' initialized
19:38:32.092: Switched to scene 'Scena'
19:38:32.093: ------------------------------------------------
19:38:32.093: Loaded scenes:
19:38:32.093: - scene 'Scena':
19:38:32.093:     - source: 'Elgato HD60 Pro' (dshow_input)
19:38:32.093: ------------------------------------------------
19:38:32.119: adding 42 milliseconds of audio buffering, total audio buffering is now 42 milliseconds
19:38:33.095: ---------------------------------
19:38:33.095: [DShow Device: 'Elgato HD60 Pro'] settings updated:
19:38:33.095:     video device: Elgato Game Capture HD
19:38:33.095:     video path: __elgato
19:38:33.095:     resolution: 1920x1080
19:38:33.095:     fps: 60.00 (interval: 166666)
19:38:33.095:     format: UYVY
19:38:33.095:     using video device audio: yes
19:38:33.095:     sample rate: 0
19:38:33.095:     channels: 0
19:38:33.095:     audio type: WaveOut
 
Sapiens

Sapiens

Forum Moderator
There are no streaming/recording attempts in this log. And don't be "enough sure," go use a tool like GPU-Z to confirm before you bother adding more hardware to the system.
 
F

fevion

New Member
Sapiens said:
There are no streaming/recording attempts in this log. And don't be "enough sure," go use a tool like GPU-Z to confirm before you bother adding more hardware to the system.
Click to expand...

Ok i think i fixed the problem. OBS fucked up a couple of settings and it was streaming at 1080p, high bitrate ecc.

I fixed with: 1280x720, 3500 bitrate, preset: faster, 70-80% cpu usage, 70% iGpu usage. I think these are the best settings for a i5-2500k. Am I correct? Now the stream have nice quality and no more stutter. But now my question is: OBS really don't touch the GPU if I use x264 codec? Moreover, the video output of the streaming PC on a monitor steal some CPU/iGpu %?
I'm a bit confused beucase I read that someone said "streaming pc need at least a low performance dedicated gpu for video output and some sort of encoding" and other said "streaming PC don't need GPU. Only good CPU".

Thank you very much for the help.
 
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