HD video capture card, also known as VGA HD capture card or audio and video capture card, can directly capture and process HD video signals, converting them into digital data that can be recognized and processed by computers. It is a computer external device, mainly used to input video and sound signals into computers for editing, compression and storage.
1. Signal conversion: convert ana-log video signals or digital video signals into digital formats that can be recognized by computers.
2. Data processing: It has the capabilities of compression encoding, filter processing, etc. to reduce the CPU burden and improve video processing efficiency.
3. Multi-channel acquisition: Some professional-grade acquisition cards support multi-channel video input and can process multiple video sources at the same time.
4. Audio and video synchronization: While processing video signals, it can synchronously capture audio signals to ensure synchronous playback of audio and video.
In the use of HD video capture cards, the quality of the capture card directly affects the quality of the acquisition effect, so it is crucial to choose a good capture card.
How to distinguish the quality of HD video capture card
1. Good stability
The quality of a HD video capture card has a lot to do with stability. You can't buy a capture card and it breaks down within a week, then replace it, and then it breaks down again within a month, and you have to replace or repair it again, which seriously affects the experience of use. Therefore, a good video capture card should be able to withstand the requirements of 7*24 hours of uninterrupted work. The stability must be high to meet the needs of special groups.
2. Support the output resolution of the acquisition signal source
The resolution of the HD video capture card supports 1080P/60 frames. So this is very important. You must buy a HD video capture card according to the resolution supported for acquisition. There are many types of capture cards on the Internet, but some live streaming cannot output 1080P/60 frames.
3. Good compatibility with software
Because cheap HD video capture cards are not compatible with all video capture card software on the market, some only support built-in software, which can easily cause trouble in use.
4. Do not hot-plug
The most important thing about high-definition video capture cards is that you must not hot-plug them. Be sure to unplug the signal line when the device is powered off or the computer is powered off. In normal customer problems, there are often cases where the capture card interface is burned due to hot plugging.
5. It is best to have a USB independent power supply for USB video capture cards
When choosing a USB high-definition video capture card, if you want to add a USB extension cable, it is best to use one with a USB independent power supply to avoid insufficient power supply to the USB interface and inability to use it normally.
High-definition capture cards are suitable for professional audio and video, image analysis and processing work, and can be widely used in microscopic imaging, medical imaging, intelligent transportation, analysis and measurement, biomedicine, machine vision, industrial image analysis, and many other high-precision image processing and analysis fields.
High-definition capture cards can be applied to industrial detection, industrial measurement, intelligent transportation, medical imaging, industrial monitoring, instrumentation, machine vision, network live broadcast, recording and broadcasting system, VOD on-demand, remote education and training, security monitoring, traffic toll collection, image acquisition and many other image acquisition, processing and analysis.
