[4/4]解决USB摄像头打开相机预览界面绿屏

liyujie

2025-08-28 786ff4f4ca2374bdd9177f2e24b503d43e7a3b93

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V4L2_CTRL_FLAG_DISABLED
V4L2_CTRL_FLAG_GRABBED
V4L2_CTRL_FLAG_READ_ONLY
V4L2_CTRL_FLAG_UPDATE
V4L2_CTRL_FLAG_INACTIVE
V4L2_CTRL_FLAG_SLIDER
V4L2_CTRL_FLAG_WRITE_ONLY
V4L2_CTRL_FLAG_VOLATILE
V4L2_CTRL_FLAG_HAS_PAYLOAD
V4L2_CTRL_FLAG_EXECUTE_ON_WRITE
V4L2_CTRL_FLAG_MODIFY_LAYOUT