如何在我的应用程序处理过程中实时创建 avi 视频文件？

Question

编辑：

这就是我所做的：在 Form1 中：

ScreenCapture sc;
AviFile af;

在 Form1 构造函数中：

sc = new ScreenCapture();
af = new AviFile();

在 Form1 timer1 滴答事件中：

private void timer1_Tick(object sender, EventArgs e)
        {
            if (playImages == true)
            {
                timer1.Enabled = false;
                play();
                timer1.Enabled = true;
            }
            else
            {
                af.CreateAvi(this.sc);
            }
        }

更改后的 AviFile 类：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.Data;
using System.Text;
using System.Windows.Forms;
using AviFile;
using ScreenShotDemo;

namespace ScreenVideoRecorder
{
    class AviFile
    {
        AviManager aviManager;

        Bitmap bmp;

        public AviFile()
        {
            aviManager = new AviManager(@"d:\testdata\new.avi", false);
        }

        public void CreateAvi(ScreenCapture sc)
        {
            bmp = new Bitmap(sc.CaptureScreen());
            VideoStream aviStream = aviManager.AddVideoStream(false, 25, bmp);//dlg.Rate, bmp);
            aviStream.AddFrame(bmp);
            bmp.Dispose();
        }

        public AviManager avim
        {
            get
            {
                return aviManager;
            }
            set
            {
                aviManager = value;
            }
        }
    }
}

在 Form1 按钮单击事件停止：

private void button3_Click(object sender, EventArgs e)
        {
            timer1.Enabled = false;
            if (af != null)
            {
                af.avim.Close();
            }
        }

但是在截取屏幕截图几秒钟后运行它之后停止之前：这是按钮1，它启动计时器并截取屏幕截图：

private void button1_Click(object sender, EventArgs e)
        {
            playImages = false;
            timer1.Enabled = true;
        }

几秒钟后，我得到一个例外：

Exception in AVIFileCreateStream: -2147205019


System.Exception was unhandled
  HResult=-2146233088
  Message=Exception in AVIFileCreateStream: -2147205019
  Source=AviFile
  StackTrace:
       at AviFile.VideoStream.CreateStreamWithoutFormat()
       at AviFile.VideoStream.CreateStream()
       at AviFile.VideoStream..ctor(Int32 aviFile, Boolean writeCompressed, Double frameRate, Bitmap firstFrame)
       at AviFile.AviManager.AddVideoStream(Boolean isCompressed, Double frameRate, Bitmap firstFrame)
       at ScreenVideoRecorder.AviFile.CreateAvi(ScreenCapture sc) in d:\C-Sharp\ScreenVideoRecorder\ScreenVideoRecorder\ScreenVideoRecorder\AviFile.cs:line 27
       at ScreenVideoRecorder.Form1.timer1_Tick(Object sender, EventArgs e) in d:\C-Sharp\ScreenVideoRecorder\ScreenVideoRecorder\ScreenVideoRecorder\Form1.cs:line 61
       at System.Windows.Forms.Timer.OnTick(EventArgs e)
       at System.Windows.Forms.Timer.TimerNativeWindow.WndProc(Message& m)
       at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
       at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
       at System.Windows.Forms.Application.Run(Form mainForm)
       at ScreenVideoRecorder.Program.Main() in d:\C-Sharp\ScreenVideoRecorder\ScreenVideoRecorder\ScreenVideoRecorder\Program.cs:line 19
       at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
       at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
       at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
       at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
       at System.Threading.ExecutionContext.RunInternal(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean preserveSyncCtx)
       at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
       at System.Threading.ThreadHelper.ThreadStart()
  InnerException: 

例外是在课程中： VideoStream 这不是我的课程，它来自我下载源文件的网站： http : //www.codeproject.com/Articles/7388/A-Simple-C-Wrapper-for-the-AviFile -图书馆

我该如何解决？

Answer 1

从你的问题中并不完全清楚你在问什么。

但似乎您只想将屏幕截图直接放入AviFile ，而不是将它们保存到磁盘然后加载它们。

关键的一段代码是这样的：

bitmap = (Bitmap)Bitmap.FromFile(Form1.imagesFiles[n]);
aviStream.AddFrame(bitmap);
bitmap.Dispose();

您可以执行以下操作，而不是将它们从文件加载到内存中：

bitmap = new Bitmap(sc.CaptureScreen());
aviStream.AddFrame(bitmap);
bitmap.Dispose();

这样你就不会保存到磁盘，你只是直接插入到 AVI 流中。