Question / Help Live Gamer Portable - C875 + OBS. Looking for support

[Mordoress]

Hi everyone.

Since this is my first post, let me introduce myself. My name is Olivier, i'm a Frenchy of 29 years old.

I've bought the avermedia live portable C875, couple years ago. I bought it because i needed to stream and record my game. Never been working properly since then. Now i wanted to get back on my project (youtube channel mainly) making tutorial and stuff. I really need to make this work.

Right, let me explain my problem.

My game card record, but only in windowed mode with ReCentral. It's a problem cause i've a huge FPS lost playing in windowed. Due to that problem, i figured that i should use OBS to record my full screen. So i downloaded OBS+LGP Stream. The thing is, without recording, OBS take me up to 40% of my CPU usage for no reason. I thought, using card doesn't use CPU, since the card encode the video? Am i right ?
There is a problem somewhere. Since i'm new to this, i can't figured out by myself.

Appreciate any help on this !

Regards,
Oli aka Mordoress

 

[sam686]

Compressed HD video over a slow USB 2.0 makes things worst in OBS compared to uncompressed capture.

Show us your OBS-Studio logs? It shows several details.
https://obsproject.com/forum/threads/please-post-a-log-with-your-issue-heres-how.23074/

USB 2.0 720p/1080p on OSB-Studio:
1. USB 2.0 capture device compress HD to fit a slow USB 2.0 speed, this may add latency.
2. CPU decompress (more CPU usage) to show it on OBS-Studio and do some processing (resize, filters, and more)
3. OBS-Studio does the encoding for live stream or recordings, which can be x264 (high CPU), NVENC, intel QuickSync, AMD video coding engine.

PCI-E and USB 3.0 with instant game view or uncompressed 4:2:2 (YUY2/UYUV) or XRGB (32 bit) or 4:2:0 (NV12/YV12)
1. Capture card send uncompressed video to softwares like OBS, very little CPU usage.
2. OBS-Studio does the encoding.