为什么我的getUserMedia只能访问部分摄像头？

export default {
    data() {
        return {}
    },
    mounted() {
        this.test();
    },
    methods: {
        async test() {
            const devices = await navigator.mediaDevices.enumerateDevices();
            const videoInputs = devices.filter(device => device.kind === 'videoinput');

            if (videoInputs.length > 0) {
                for (const videoInput of videoInputs) {
                    try {
                        const stream = await navigator.mediaDevices.getUserMedia({ video: { deviceId: videoInput.deviceId } });
                        document.getElementById(videoInput.deviceId).srcObject = stream; //假设元素ID与deviceId一致
                    } catch (error) {
                        console.error(`Error accessing video input ${videoInput.deviceId}:`, error);
                    }
                }
            }
        }
    }
}