怎么用脚本获取摄像头列表

本文目录导读：

1. JavaScript (浏览器环境)
2. Python (使用 OpenCV)
3. Python (使用 pycam)
4. 命令行脚本 (PowerShell/Windows)
5. Node.js (使用 puppeteer)
6. 注意事项

JavaScript (浏览器环境)

async function getCameraList() {
    try {
        const devices = await navigator.mediaDevices.enumerateDevices();
        const cameras = devices.filter(device => device.kind === 'videoinput');
        const cameraList = cameras.map((camera, index) => ({
            id: camera.deviceId,
            label: camera.label || `摄像头 ${index + 1}`,
            groupId: camera.groupId
        }));
        return cameraList;
    } catch (error) {
        console.error('获取摄像头列表失败:', error);
        return [];
    }
}
// 使用示例
getCameraList().then(cameras => {
    console.log('摄像头列表:', cameras);
});

Python (使用 OpenCV)

import cv2
def get_camera_list():
    camera_list = []
    # 测试0-9号摄像头
    for i in range(10):
        cap = cv2.VideoCapture(i, cv2.CAP_DSHOW)  # Windows用DSHOW，Linux用CAP_V4L2
        if cap.isOpened():
            camera_list.append({
                'index': i,
                'name': f'摄像头 {i}',
                'width': int(cap.get(cv2.CAP_PROP_FRAME_WIDTH)),
                'height': int(cap.get(cv2.CAP_PROP_FRAME_HEIGHT))
            })
            cap.release()
    return camera_list
# 使用示例
cameras = get_camera_list()
print('摄像头列表:', cameras)

Python (使用 pycam)

import cv2
import re
import subprocess
import sys
def get_camera_list_advanced():
    cameras = []
    if sys.platform == 'win32':
        # Windows下使用DirectShow
        for i in range(10):
            cap = cv2.VideoCapture(i, cv2.CAP_DSHOW)
            if cap.isOpened():
                # 获取更详细的信息
                name = f'Camera {i} (DSHOW)'
                if hasattr(cap, 'get'):
                    name = cap.get(cv2.CAP_PROP_DEVICE_DESCRIPTION) or name
                cameras.append({
                    'index': i,
                    'name': name
                })
                cap.release()
    return cameras

命令行脚本 (PowerShell/Windows)

# Get-WmiObject Win32_PnPEntity | Where-Object { $_.PNPClass -eq "Camera" }
# 或者使用更现代的方法
Add-Type -AssemblyName System.Windows.Forms
$manager = New-Object System.Windows.Forms.AxHost
$devices = $manager.GetConnectedDevices()
$cameras = @()
foreach ($device in $devices) {
    if ($device.DeviceCategory -eq 'VideoInputDevice') {
        $cameras += [PSCustomObject]@{
            Name = $device.DeviceName
            ID = $device.DeviceID
        }
    }
}
Write-Host "摄像头列表:"
$cameras | Format-Table

Node.js (使用 puppeteer)

const puppeteer = require('puppeteer');
async function getCameraList() {
    const browser = await puppeteer.launch();
    const page = await browser.newPage();
    await page.goto('about:blank');
    const cameraList = await page.evaluate(async () => {
        const devices = await navigator.mediaDevices.enumerateDevices();
        return devices
            .filter(device => device.kind === 'videoinput')
            .map(camera => ({
                id: camera.deviceId,
                label: camera.label || 'Unknown'
            }));
    });
    await browser.close();
    return cameraList;
}
// 使用示例
getCameraList().then(console.log);

注意事项

1. 权限问题：浏览器脚本需要用户授权才能访问摄像头设备
2. 跨平台差异：不同操作系统对摄像头的识别方式不同
3. 虚拟摄像头：某些软件（如OBS）会创建虚拟摄像头，也会被检测到
4. 性能考虑：反复打开/关闭摄像头可能会导致系统资源占用

选择适合你需求的脚本即可,如果需要在特定平台获取更详细信息，建议使用原生API或专门的库。