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请教下，系统起来后，编码格式设置为双码流的Dual H264+JPG，分辨率设置为H264:1080 ,JPG:QVGA，可以检测到人脸，但是把分辨率换成H264:1080 ,JPG:D1，或是其他的编码方式和分辨率都检测不到，这是什么问题？
