需求:

打开相机并显示在UI上

效果:

注意：

电脑可能有多个摄像头，注意名称

代码:

using System;
using System.Linq;
using UnityEngine;
using UnityEngine.UI;
using System.Collections.Generic;
#if UNITY_EDITOR
using UnityEditor;
#endif

namespace Streamlab.XingJiKongLong
{
#if UNITY_EDITOR
    [CustomEditor(typeof(RealCameraDeviceManager))]
    public class RealCameraDeviceManagerEditor : Editor
    {

        private RealCameraDeviceManager script;

        private void OnEnable()
        {
            script = (RealCameraDeviceManager)target;
        }

        public override void OnInspectorGUI()
        {
            base.OnInspectorGUI();
            GUILayout.BeginHorizontal();
            {
                if (GUILayout.Button("初始化", GUILayout.Height(50)))
                {
                    script.InitDevices();
                }
                if (GUILayout.Button("打开", GUILayout.Height(50)))
                {
                    script.Play();
                }

                if (GUILayout.Button("关闭", GUILayout.Height(50)))
                {
                    script.Stop();
                }

                if (GUILayout.Button("暂停", GUILayout.Height(50)))
                {
                    script.Pause();
                }
            }
            GUILayout.EndHorizontal();

        }
    }
#endif
    public class RealCameraDeviceManager : MonoBehaviour
    {
        public bool Inited = false;
        public bool IsPlaying = false;

        private WebCamDevice CurrentWebCamDevice;
        private WebCamTexture CurrentWebCamTexture;

        public RawImage image;

        /// <summary>
        /// 默认摄像头设备名称
        /// </summary>
        public string DefaultWebCamDeviceName = "USB2.0 PC CAMERA";

        public List<string> WebCamDevice = new List<string>();
        public void InitDevices()
        {
            WebCamDevice[] devices = WebCamTexture.devices;

            if (devices.Length == 0)
            {
                throw new Exception("暂未识别到摄像头设备,请检查摄像头有没有");
            }
            else
            {
                WebCamDevice.Clear();
                foreach (var item in devices)
                {
                    Debug.Log($"摄像头设备【{item.name}】");
                    WebCamDevice.Add(item.name);
                }
            }

            if (string.IsNullOrEmpty(DefaultWebCamDeviceName))
            {
                DefaultWebCamDeviceName = devices[0].name;
            }


            CurrentWebCamDevice = devices.Where(x => x.name == DefaultWebCamDeviceName).FirstOrDefault();
            CurrentWebCamTexture = new WebCamTexture(CurrentWebCamDevice.name);

            if (image == null)
            {
                throw new Exception("未指定显示摄像头的UI");
            }
            image.texture = CurrentWebCamTexture;

            Inited = true;
        }

        public void Play()
        {
            if (Inited == false)
            {
                throw new Exception("未初始化摄像头设备");
            }

            CurrentWebCamTexture.Play();
            IsPlaying = true;
        }

        public void Stop()
        {
            if (Inited == false)
            {
                throw new Exception("未初始化摄像头设备");
            }
            CurrentWebCamTexture.Stop();
            IsPlaying = false;
        }

        public void Pause()
        {
            if (Inited == false)
            {
                throw new Exception("未初始化摄像头设备");
            }
            CurrentWebCamTexture.Pause();
            IsPlaying = false;
        }
    }
}

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