By PURPLELEC | 25 May 2023 | 0 Comments
Explanation of PS5 game live capture card parameters
The capture card inputs a certain device (which can be a game console, a mobile phone, or other devices that can output video images and sounds) into the capture card through the HDMI interface. Then output to other devices, such as a computer, through the USB interface of the capture card. The computer receives the video and audio output from the capture card from the USB interface through video capture software such as OBS. Then play it out or push it out to the live broadcast platform. Some of these capture cards also have a channel of video that will be directly sent to a display device, such as a monitor or a TV, through the HDMI interface. This way is called ring out.
The aspects involved in the capture card mainly include the following aspects: video input and output resolution, frame rate, picture quality, delay, power supply, and whether it has the loop-out function.
1. Resolution and frame rate.
Putting these two together, there are many factors that affect resolution and frame rate. Including all intermediate HDMI cables, input and output supported caps, etc. Generally, HDMI cables must support 1080P and 30 frames, which is the bottom limit. The good thing is that it supports 4K and 60 frames. If you don’t support it, no matter how good your computer is, no matter how good your game console is, no matter how good your capture card is, you will only output or capture images of 1080P and 30 frames through this cable. So the line is the basis.
Then talk about each input and output. The first is the input of the capture card, 1080P60 frame, 4K30 frame, or 4K60 frame, this depends on your needs, and you should also ask clearly. Then there is the output. This output is for computer acquisition. It is a processed picture. Is this 1080P or 4K, 30 or 60 frames. Another item is looping out, and some very cheap capture cards do not have the looping out function. If so, look at the parameters, there are also many possibilities, whether it is 1080P or 4K, whether it is 30 or 60 frames.
When buying a capture card, you should ask customer service a few questions: 1. Input——4K60 frames. 2. Loop out 4K60 frames. 3. Output - 1080P60 frame. Don't just read the promotional details, 4K picture quality, 60 frames high frame rate, etc. Be sure to ask each input and output separately, otherwise the details may be just fishing in troubled waters. It is said that it is 4K, but it is only the input end, and the actual output and loop output are both 1080P.
2. Picture quality
This point depends on the technical level of the capture card. It must be that the expensive ones are good, and the cheap ones are bad. This is not easy to quantify. In terms of parameters, it supports 8-bit BIT output, 32-bit or 36-bit and so on. Then whether the capture card has its own H.264 encoder, if it supports it, it can reduce the burden on the computer, and the computer with low configuration can also output stable and high-quality images.
The main bottleneck is the USB interface. You must buy USB 3.0. 2.0 is not acceptable. 3.0 is fast and can guarantee the lowest possible transmission delay and output picture quality. After all, this is an output interface, so it must be as high as possible.
4. Power supply
On the one hand, the compact capture cards do not need a separate power supply. The USB interface can be used as a power supply when plugged into a computer.
5. Ring out
The loop-out function can be understood as the capture card outputting the input image without processing it. It is generally used to directly connect to the monitor for playback, and the output video is used for the computer. Loop-out function may not be available in low-end capture cards, the ones that cost around 100 yuan. Therefore, it is necessary to check whether there is a loop-out function, and what is the resolution and frame rate of the loop-out output.
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