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Depending on your project requirements, you have two main paths for saving a frame:

In DirectShow, a USB camera is represented as a "source filter." Most modern cameras provide at least two output "pins": 53455028.jpg

Reference the (specifically the StillCap sample) for the most reliable C++ implementation examples. zouhuigang/zishahu: 紫砂壶拍照项目 - GitHub Depending on your project requirements, you have two