During the use of the HDMI capture card, there will also be a situation where the video signal is captured but the image is not displayed, which is a headache. When the HDMI capture card does not display images, it is like turning on a computer monitor and not lighting up. It may be caused by a variety of factors. As long as we follow the following 5 points to investigate step by step, most of the reasons can be found.
1. Whether the collection process is interfered by HDCP encryption and decryption
There is no problem with the HDMI video source output signal to the display device, but there is no image when connected to the capture card. Then you need to confirm whether your device has the HDCP encryption function and whether the capture card has the HDCP decryption function. . This is often a big reason why some HDMI capture cards cannot output signals.
2. Can the video source output HDMI signals to the HDMI capture card?
First, check whether the HDMI video source connected to the HDMI capture card has images, whether the HDMI video cable is intact, and whether the video source can output video signals normally. If the video cannot be output to the display device, then you need to check whether there is a problem with the video source interface, or whether replacing the HDMI cable can solve the problem.
3. Check whether there is any problem with the settings of the collection software
After confirming that there is no problem with the above two points, you must also confirm whether there is any problem with the settings of the collection software, because some software does not have the preview function checked by default. You have to check this yourself after opening the software. For example, in AMCAP, you need to check the preview option before the image will appear.
For some software, the format selection is also very important when collecting SD signals. It must be set to match the format of the video source signal. For example, in potplayer, you need to select the country in TV----System-----. Only when the correct format is sel-ected will the image appear.
4. Check whether the chip of the HDMI capture card is damaged
Prevent the HDMI interface from being hot-plugged and burning the chip. Some customers often directly unplug the cable on the HDM capture card to continuously cut off the power supply when using it. Digital signal transmission carries current. In this way, hot plugging and unplugging may break down the chip, causing the capture card to have no image.
5. Whether the HDMI capture output resolution matches the video source
There are also some HDMI capture cards whose output resolution cannot meet the required resolution, but the performance of the capture card can support it. What's going on? Because the output resolution of some cards is designed to match the resolution of the video source, that is, the video source must be set to whatever the output is.
