Unity帧序列实时渲染脚本

using UnityEngine;
using System.IO;

public class RealtimeScreenRecorder : MonoBehaviour
{
    public TextureFormat textureFormat = TextureFormat.RGB24;
    public int width = 1280;
    public int height = 720;

    [Header("Example D:/Test/Images/{0:0000}[{1}]")]
    public string savePath;

    Texture2D mTmpTexture2D;
    RenderTexture mRenderTexture;

    RenderTexture RenderTexture
    {
        get
        {
            if (mRenderTexture == null)
            {
                mRenderTexture = new RenderTexture(width, height, 24);
            }

            return mRenderTexture;
        }
    }

    Texture2D TmpTexture2D
    {
        get
        {
            if (mTmpTexture2D == null)
                mTmpTexture2D = new Texture2D(width, height, textureFormat, false);

            return mTmpTexture2D;
        }
    }

    public string FileSavePath
    {
        get
        {
            return string.Format(savePath + ".jpg", Time.frameCount, Time.time);
        }
    }


    void Start()
    {
        var outputPath = Path.GetDirectoryName(string.Format(savePath, 0, 0));
        if (!Directory.Exists(outputPath))
        {
            Directory.CreateDirectory(outputPath);
        }
        else
        {
            Directory.Delete(outputPath, true);
            Directory.CreateDirectory(outputPath);
            //clear old images.
        }
    }

    void Update()
    {
        if (Camera.main == null) return;

        RenderTexture.active = RenderTexture;
        Camera.main.targetTexture = RenderTexture;
        Camera.main.Render();

        TmpTexture2D.ReadPixels(new Rect(0, 0, width, height), 0, 0);
        TmpTexture2D.Apply();

        File.WriteAllBytes(FileSavePath, TmpTexture2D.EncodeToJPG(100));

        Camera.main.targetTexture = null;
        RenderTexture.active = null;
    }

    void OnDestroy()
    {
        RenderTexture.Release();
        DestroyObject(RenderTexture);
        DestroyObject(mTmpTexture2D);

        System.GC.Collect();
    }
}