Tho pci ex card??
- Thread starter SilvaJ
- Start date
Bro, i'm not talking about nvidia or amd gpu. I'm talking about SOC's, arm processor dedicated to processing only h.264.
Like Blackmagic Intensity Pro 4K.
On a PC dedicated only to video capture and nothing else. These cards don't even use the CPU.
Would the same thing happen with two gpus, bottleneck?
Like Blackmagic Intensity Pro 4K.
On a PC dedicated only to video capture and nothing else. These cards don't even use the CPU.
Would the same thing happen with two gpus, bottleneck?
koala
Active Member
OBS isn't able to use any external h.264 encoder except the encoders in Nvidia GPUs (nvenc), Intel (Quicksync) or AMD (VCE). Using two GPUs will not increase performance with OBS, because data has to be moved around between cards, which is dragging down the system more than the added computing performance will improve it.
If this is not what you're talking about, explain in more detail what you intend to do. We cannot guess what you didn't tell.
If this is not what you're talking about, explain in more detail what you intend to do. We cannot guess what you didn't tell.
Okay, I understand the logic of double hardware, latency.
But now you have pointed out something that I did not imagine. I believed that OBS alone would operate 100% of most video compression hardware.
Does it mean that OBS could not use BM Intensity 4k (for example), to capture and compress a video without using gpu / cpu resources, even though this card has x264 compression hardware???
*Thanks for the answers. I have been researching video capture 4 to 6 hours a day for the past week.
But now you have pointed out something that I did not imagine. I believed that OBS alone would operate 100% of most video compression hardware.
Does it mean that OBS could not use BM Intensity 4k (for example), to capture and compress a video without using gpu / cpu resources, even though this card has x264 compression hardware???
*Thanks for the answers. I have been researching video capture 4 to 6 hours a day for the past week.
Ok. See, this guy installed a pcie capture device, opened OBS and added it as a 'capture device' and recorded a video. I believed that the pcie device was responsible for 100% of the video capture, commanded by OBS. At 6:00
m.youtube.com
Are you saying that the only function of that device over there is to receive and pass the hdmi signal to the monitor, and that who is really recording are the resources of the cpu/gpu?
EZCAP 294 U3 CAPTURE INSTALAÇÃO DA PLACA DE CAPTURA PCI BARATA
Fala galera belezinha hoje trago para voces um video INSTALANDO A PLACA DE CAPTURA EZCAP 294 U3 CAPTURE NO SLOT PCI ✅COMPRE AQUI https://bit.ly/2HiODCQ SEJA ...
m.youtube.com
So is that what you're saying?...
obsproject.com
Question / Help - ONCE AND FOR ALL: Does a Capture Card help?
PC Spec: Windows 7 64 Bit ASUS P8P67 EVGA SuperClocked GeForce GTX 570 i7-2600K 3.4GHz (3.8GHz Turbo Boost) Mushkin Enhanced Redline 8GB DDR3 Internet: 24down, 3up. Currently quality: http://www.twitch.tv/burkeblack/b/469421970 OBS Settings: Quality - 8 Bit rate - 2800 Res - 720p 30fps I am...
koala
Active Member
You need a capture card to capture an external hdmi signal, for example from a gaming console or a dslr. It's the scanner that converts the video signal to an (unencoded) data stream. OBS is reading this unencoded data stream, processes it (compositing with other source), encodes it, then saves to disk or sends as encoded data stream to some streaming provider.
If you want to capture a game on your PC, you don't need a capture card, because OBS is able to read the video data directly from the frame buffer of your GPU. This is way more efficient than scanning the hdmi signal and feeding it back with a capture card through USB or the pci-express bus into OBS.
A h.264 encoder that may exist on some capture cards isn't used by OBS. It's only used by the native software that comes with that capture card. It's proprietary with no standardized API or no API at all, so only the native capture card software is able to use it.
If you want to capture a game on your PC, you don't need a capture card, because OBS is able to read the video data directly from the frame buffer of your GPU. This is way more efficient than scanning the hdmi signal and feeding it back with a capture card through USB or the pci-express bus into OBS.
A h.264 encoder that may exist on some capture cards isn't used by OBS. It's only used by the native software that comes with that capture card. It's proprietary with no standardized API or no API at all, so only the native capture card software is able to use it.
Now it makes sense.
In fact I just want to record my gameplay, in 1080p60 with great quality if possible. Edit the video without haste, and then leave the PC sending the file overnight. I don't want anything with streaming. My problem is that all posts, articles, that I read only talk about streaming, it confuses me.
I'm just trying to find a more cost-benefit solution that doesn't involve building a second PC.
Can my pc do this?
* MSI B450, Ryzen 7 2700, RX 580 8GB, 16GB Ram, M2 256GB, SSD 128GB, HDD1T.
In fact I just want to record my gameplay, in 1080p60 with great quality if possible. Edit the video without haste, and then leave the PC sending the file overnight. I don't want anything with streaming. My problem is that all posts, articles, that I read only talk about streaming, it confuses me.
I'm just trying to find a more cost-benefit solution that doesn't involve building a second PC.
Can my pc do this?
* MSI B450, Ryzen 7 2700, RX 580 8GB, 16GB Ram, M2 256GB, SSD 128GB, HDD1T.
koala
Active Member
Recording isn't very much different from streaming from OBS' point of view. Instead of sending the encoded video data to some streaming provider, it saves the same data to disk. The main difference from streaming to recording is you are able to encode with much higher quality than with streaming, because you don't have bandwidth constraints. On disk, you have unlimited space and almost unlimited throughput, so you choose a quality-based rate control (CRF, CQP, ICQ) for recording instead of a constant bitrate rate control (CBR) for streaming.
Your PC with a Ryzen 7 2700 and a RX 580 is able to support recording with OBS, yes. Use Tools->Auto Configuration Wizard to get a baseline configuration and fine tune from this. Don't forget to limit the fps of your game. Limit to 60 fps and activate vsync. If you let it run unlimited, the game will eat up all GPU and CPU resources and OBS is starving from resources, so any video will be choppy and low quality.
Your PC with a Ryzen 7 2700 and a RX 580 is able to support recording with OBS, yes. Use Tools->Auto Configuration Wizard to get a baseline configuration and fine tune from this. Don't forget to limit the fps of your game. Limit to 60 fps and activate vsync. If you let it run unlimited, the game will eat up all GPU and CPU resources and OBS is starving from resources, so any video will be choppy and low quality.
Well, I was initially believing that pci ex capture cards would be a good cost-effective way to remove workload from the PC, but that is just an expensive connector...
With 1GB/s write on the M2 it's like I have an 8 gigabit network for streaming. Which frees up processing, from compression to quality.
So I believe that I can take a good quality video from my PC without having to mount a second machine right from the start.
Thanks for the clarifications, they were very helpful.
With 1GB/s write on the M2 it's like I have an 8 gigabit network for streaming. Which frees up processing, from compression to quality.
So I believe that I can take a good quality video from my PC without having to mount a second machine right from the start.
Thanks for the clarifications, they were very helpful.
koala
Active Member
Exactly, a capture card is only a connector. Regardless of it being USB or pci-express. The compositing workload is on the GPU, and the encoding workload is either on the CPU (for x264 software encoder) or in case of a hardware encoder on the encoding circuit of the GPU. In case of an Nvidia GPU, the hardware encoder is free, because it is a dedicated circuit, and in case of an AMD or Intel GPU, it needs some GPU computing resources. On Intel GPUs (iGPU) not very much, on AMD GPUs quite some.
Because of this, optimal streaming or recording hardware includes either a CPU strong enough to support both the game and the x264 software encoder and a GPU of arbitrary performance. Or a CPU of arbitrary performance and an NVidia GPU for the nvenc hardware encoder.
Because of this, optimal streaming or recording hardware includes either a CPU strong enough to support both the game and the x264 software encoder and a GPU of arbitrary performance. Or a CPU of arbitrary performance and an NVidia GPU for the nvenc hardware encoder.
I read these days about Intel Quicksyn, NVidia nvenc, and AMD VCE. I found it more interesting to focus on h.264 because of the quality, although my hardware is not ideal.
A pity that many cores do not help, there are Xeon with 12/24 and 15/30 cores in China and the x79 and x99 platforms with good prices. But with 3.6Ghz I believe it is not fast enough. The current Intel platform is very expensive for me.
Perhaps an upgrade to Ryzen 7 3700x will make things easier in the future.
A pity that many cores do not help, there are Xeon with 12/24 and 15/30 cores in China and the x79 and x99 platforms with good prices. But with 3.6Ghz I believe it is not fast enough. The current Intel platform is very expensive for me.
Perhaps an upgrade to Ryzen 7 3700x will make things easier in the future.
koala
Active Member
A change to a Nvidia RTX or GTX 1660 to get the most advanced nvenc circuit might be a cheaper choice. Nvenc quality on these (with the Turing chip) is between the "fast" and "medium" preset of x264, which is a stretch for most CPUs except the most powerful. With nvenc, it's free.
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