【发布时间】：2022-01-30 19:44:12
【问题描述】：
我正在尝试编写一些视频拼接软件，以模拟具有全方位摄像头系统的汽车仪表板的功能。该程序使用高清视频采集卡从 5 个 GoPro 摄像机进行流式传输，并使用 PIR 传感器检测运动，并将运动检测数据通过串行连接发送。
我遇到了内存泄漏的问题，特别是它使用了大量的“修改”内存，它首先填满硬件内存，然后是虚拟内存，然后程序崩溃。
我对视频处理和openGL非常陌生，对内存管理和无人代码几乎没有经验。
我已将整个代码包含在底部，因为我可能看错了地方，但我相信问题是围绕这些关键部分出现的：
从 aForge 网络摄像头驱动程序获取图像的事件：
videoSource1.NewFrame += (Object sender, NewFrameEventArgs eventArgs) =>
{
System.Threading.Thread.Sleep(10);
if (videoFrame1 != null)
lock (videoFrame1)
{
videoFrame1 = new Bitmap(eventArgs.Frame);
}
else
{
videoFrame1 = new Bitmap(eventArgs.Frame);
}
};
以及将位图传递给openGl的东西并显示它的部分：
if (videoFrame1 != null)
lock (videoFrame1)
{
glControl1.MakeCurrent();
if (videoTexture1 != -1)
GL.DeleteTextures(1, ref videoTexture1);
videoTexture1 = TexUtil.CreateTextureFromBitmap(videoFrame1);
GL.BindTexture(TextureTarget.Texture2D, videoTexture1);
// videoFrame1 = null;
fullscreenQuad.Draw(1);
if (selectedCam == 1)
{
drawSide(videoFrame1);
glControl1.MakeCurrent();
}
videoFrame1.Dispose();
GC.Collect();
}
如果我处理位图然后调用 GC.collect 这应该释放空间吗？
我是否应该调用其他方法以另一种方式摆脱分配的 RAM？
有没有办法强制 c# 将 ram 释放为“清零”而不是将其标记为“已修改”
如果我使用 sysinternals RAMMap 实用程序，我可以将修改后的 ram 转移到“备用”，然后可以擦除备用以释放空间。有没有办法在 c# 中以编程方式执行此操作？
对不起，如果这有点混乱，我说过我对此很陌生
非常感谢，
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using AForge.Video;
using AForge.Video.DirectShow;
using OpenTK;
using OpenTK.Graphics;
using OpenTK.Graphics.OpenGL;
using OpenTK.Input;
using TexLib;
namespace GLembedded
{
public partial class Form1 : Form
{
bool loaded = false;
Bitmap videoFrame1 = null;
Bitmap videoFrame2 = null;
Bitmap videoFrame3 = null;
Bitmap videoFrame4 = null;
VideoCaptureDevice videoSource1;
VideoCaptureDevice videoSource2;
VideoCaptureDevice videoSource3;
VideoCaptureDevice videoSource4;
FilterInfoCollection videoDevices;
int videoTexture1 = -1;
int videoTexture2 = -1;
int videoTexture3 = -1;
int videoTexture4 = -1;
int videoTexture5 = -1;
int videoTexture6 = -1;
int selectedCam = 1;
int countdown = 0;
int bytein = 0;
Quad fullscreenQuad = new Quad();
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
timer1.Start();
this.DoubleBuffered = true;
serialPort1.Open();
}
private void SetupViewport()
{
int w = glControl1.Width;
int h = glControl1.Height;
// GL.MatrixMode(MatrixMode.Projection);
// GL.Ortho(0, w, 0, h, -1, 1); // Bottom-left corner pixel has coordinate (0, 0)
// GL.Viewport(0, 0, w, h); // Use all of the glControl painting area
}
private void glControl1_Load(object sender, EventArgs e)
{
glControl1.MakeCurrent();
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
GL.Enable(EnableCap.DepthTest);
TexUtil.InitTexturing();
videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
GL.Hint(HintTarget.PerspectiveCorrectionHint, HintMode.Nicest);
GL.DepthFunc(DepthFunction.Lequal);
GL.ColorMaterial(MaterialFace.FrontAndBack, ColorMaterialParameter.AmbientAndDiffuse);
GL.Enable(EnableCap.ColorMaterial);
GL.Clear(ClearBufferMask.None);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.Ext.BindFramebuffer(FramebufferTarget.FramebufferExt, 0); // render per default onto screen, not some FBO
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0); // use the visible framebuffer
GL.ClearColor(Color.Black);
GL.Viewport(glControl1.Location.X - 317, glControl1.Location.Y - 67, glControl1.Width, glControl1.Height);
Matrix4 modelview = Matrix4.LookAt(Vector3.Zero, -1 * Vector3.UnitZ, Vector3.UnitY);
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadMatrix(ref modelview);
GL.MatrixMode(MatrixMode.Projection);
GL.LoadIdentity();
GL.Ortho(-1, 1, -1, 1, -1, 1.1);
OpenVideoStream();
loaded = true;
}
private void glControl1_Resize(object sender, EventArgs e)
{
if (!loaded)
return;
}
private void glControl1_Paint(object sender, PaintEventArgs e)
{
glControl1.MakeCurrent();
if (!loaded) // Play nice
return;
//if(videoFrame1!=null & videoFrame2!=null & videoFrame3!=null & videoFrame4!=null )
{
GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.Enable(EnableCap.Texture2D);
if (videoFrame1 != null)
lock (videoFrame1)
{
glControl1.MakeCurrent();
if (videoTexture1 != -1)
GL.DeleteTextures(1, ref videoTexture1);
videoTexture1 = TexUtil.CreateTextureFromBitmap(videoFrame1);
GL.BindTexture(TextureTarget.Texture2D, videoTexture1);
// videoFrame1 = null;
fullscreenQuad.Draw(1);
if (selectedCam == 1)
{
drawSide(videoFrame1);
glControl1.MakeCurrent();
}
videoFrame1.Dispose();
GC.Collect();
}
if (videoFrame2 != null)
lock (videoFrame2)
{
glControl1.MakeCurrent();
if (videoTexture2 != -1)
GL.DeleteTextures(1, ref videoTexture2);
videoTexture2 = TexUtil.CreateTextureFromBitmap(videoFrame2);
GL.BindTexture(TextureTarget.Texture2D, videoTexture2);
if (selectedCam == 2)
{
drawSide(videoFrame2);
glControl1.MakeCurrent();
}
videoFrame2.Dispose();
// videoFrame2 = null;
GC.Collect();
fullscreenQuad.Draw(2);
}
if (videoFrame3 != null)
lock (videoFrame3)
{
glControl1.MakeCurrent();
if (videoTexture3 != -1)
GL.DeleteTextures(1, ref videoTexture3);
videoTexture3 = TexUtil.CreateTextureFromBitmap(videoFrame3);
GL.BindTexture(TextureTarget.Texture2D, videoTexture3);
if (selectedCam == 3)
{
drawSide(videoFrame3);
glControl1.MakeCurrent();
}
videoFrame3.Dispose();
// videoFrame3 = null;
GC.Collect();
fullscreenQuad.Draw(3);
}
if (videoFrame4 != null)
lock (videoFrame4)
{
if (videoTexture4 != -1)
GL.DeleteTextures(1, ref videoTexture4);
videoTexture4 = TexUtil.CreateTextureFromBitmap(videoFrame4);
GL.BindTexture(TextureTarget.Texture2D, videoTexture4);
if (selectedCam == 4)
{
drawSide(videoFrame4);
glControl1.MakeCurrent();
}
videoFrame4.Dispose();
// videoFrame4 = null;
GC.Collect();
fullscreenQuad.Draw(4);
}
}
glControl2.SwapBuffers();
// GL.Clear(ClearBufferMask.ColorBufferBit | ClearBufferMask.DepthBufferBit);
GL.Disable(EnableCap.Texture2D);
GL.Begin(BeginMode.Quads);
GL.Color4(0f, 0f, 0f,1f);
GL.Vertex2(1, .98);
GL.Vertex2(.98, 1);
GL.Vertex2(0, 0.02);
GL.Vertex2(0, -0.02);
GL.Vertex2(-.98, 1);
GL.Vertex2(-1, .98);
GL.Vertex2(0, -0.02);
GL.Vertex2(0, 0.02);
GL.Vertex2(-1, -.98);
GL.Vertex2(-.98, -1);
GL.Vertex2(0, -0.02);
GL.Vertex2(0, 0.02);
GL.Vertex2(1, -.98);
GL.Vertex2(.98, -1);
GL.Vertex2(0, -0.02);
GL.Vertex2(0, 0.02);
GL.Vertex2(-1, 1);
GL.Vertex2(-0.98, 1);
GL.Vertex2(-0.98, 0.98);
GL.Vertex2(-1, 0.98);
GL.Vertex2(1, 1);
GL.Vertex2(0.98, 1);
GL.Vertex2(0.98, 0.98);
GL.Vertex2(1, 0.98);
GL.Vertex2(-1, -1);
GL.Vertex2(-0.98, -1);
GL.Vertex2(-0.98, -0.98);
GL.Vertex2(-1, -0.98);
GL.Vertex2(1, -1);
GL.Vertex2(0.98, -1);
GL.Vertex2(0.98, -0.98);
GL.Vertex2(1, -0.98);
GL.End();
GL.Color4(1f, 1f, 1f, 1f);
glControl1.SwapBuffers();
}
private void OpenVideoStream()
{
// Console.WriteLine("Connecting to {0}", url);
videoSource1 = new VideoCaptureDevice(videoDevices[0].MonikerString);
videoSource2 = new VideoCaptureDevice(videoDevices[1].MonikerString);
videoSource3 = new VideoCaptureDevice(videoDevices[2].MonikerString);
videoSource4 = new VideoCaptureDevice(videoDevices[3].MonikerString);
videoSource1.NewFrame += (Object sender, NewFrameEventArgs eventArgs) =>
{
System.Threading.Thread.Sleep(10);
if (videoFrame1 != null)
lock (videoFrame1)
{
videoFrame1 = new Bitmap(eventArgs.Frame);
}
else
{
videoFrame1 = new Bitmap(eventArgs.Frame);
}
};
videoSource2.NewFrame += (Object sender, NewFrameEventArgs eventArgs) =>
{
System.Threading.Thread.Sleep(10);
if (videoFrame2 != null)
lock (videoFrame2)
{
videoFrame2 = new Bitmap(eventArgs.Frame);
}
else
{
videoFrame2 = new Bitmap(eventArgs.Frame);
}
};
videoSource3.NewFrame += (Object sender, NewFrameEventArgs eventArgs) =>
{
System.Threading.Thread.Sleep(10);
if (videoFrame3 != null)
lock (videoFrame3)
{
videoFrame3 = new Bitmap(eventArgs.Frame);
}
else
{
videoFrame3 = new Bitmap(eventArgs.Frame);
}
};
videoSource4.NewFrame += (Object sender, NewFrameEventArgs eventArgs) =>
{
System.Threading.Thread.Sleep(10);
if (videoFrame4 != null)
lock (videoFrame4)
{
videoFrame4 = new Bitmap(eventArgs.Frame);
}
else
{
videoFrame4 = new Bitmap(eventArgs.Frame);
}
};
videoSource1.Start();
videoSource2.Start();
videoSource3.Start();
videoSource4.Start();
}
private void timer1_Tick(object sender, EventArgs e)
{
glControl1.Refresh();
pictureBox2.Visible = (selectedCam == 1) ? true : false;
pictureBox3.Visible = (selectedCam == 2) ? true : false;
pictureBox4.Visible = (selectedCam == 3) ? true : false;
pictureBox5.Visible = (selectedCam == 4) ? true : false;
}
private void glControl2_Paint(object sender, PaintEventArgs e)
{
// glControl2.SwapBuffers();
}
private void glControl2_Load(object sender, EventArgs e)
{
glControl2.MakeCurrent();
int w = glControl2.Width;
int h = glControl2.Height;
GL.MatrixMode(MatrixMode.Modelview);
GL.LoadIdentity();
GL.Ortho(-1, 1, -1, 1, -1, 1.1);
GL.Viewport(0,0, glControl2.Width, glControl2.Height);
GL.MatrixMode(MatrixMode.Modelview);
TexUtil.InitTexturing();
GL.Hint(HintTarget.PerspectiveCorrectionHint, HintMode.Nicest);
GL.ColorMaterial(MaterialFace.FrontAndBack, ColorMaterialParameter.AmbientAndDiffuse);
GL.Enable(EnableCap.ColorMaterial);
GL.Clear(ClearBufferMask.None);
GL.Enable(EnableCap.Blend);
GL.BlendFunc(BlendingFactorSrc.SrcAlpha, BlendingFactorDest.OneMinusSrcAlpha);
GL.Ext.BindFramebuffer(FramebufferTarget.FramebufferExt, 0); // render per default onto screen, not some FBO
GL.BindFramebuffer(FramebufferTarget.Framebuffer, 0); // use the visible framebuffer
GL.MatrixMode(MatrixMode.Projection);
GL.LoadIdentity();
GL.Ortho(-1, 1, -1, 1, -1, 1.1);
}
private void drawSide(Bitmap cam)
{
glControl2.MakeCurrent();
GL.MatrixMode(MatrixMode.Modelview);
GL.Color3(1f, 1f, 1f);
GL.PushMatrix();
GL.Enable(EnableCap.Texture2D);
videoTexture5 = TexUtil.CreateTextureFromBitmap(cam);
GL.BindTexture(TextureTarget.Texture2D, videoTexture5);
GL.Begin(BeginMode.Quads);
GL.TexCoord2(0, 0);
GL.Vertex2(-1, 1);
GL.TexCoord2(1f, 0);
GL.Vertex2(1f, 1f);
GL.TexCoord2(1f, 1f);
GL.Vertex2(1f, -1f);
GL.TexCoord2(0, 1f);
GL.Vertex2(-1f, -1f);
GL.End();
GL.Disable(EnableCap.Texture2D);
GL.Begin(BeginMode.Quads);
GL.Color4(1f, 0f, 0.0f, 1f);
//red
GL.Vertex2(-0.8f, -0.6f);
GL.Vertex2(-0.7f, -0.4f);
GL.Vertex2(-0.68f, -0.4f);
GL.Vertex2(-0.78f,- 0.6f);
GL.Vertex2(-0.75f, -0.49f);
GL.Vertex2(-0.65f, -0.49f);
GL.Vertex2(-0.65f, -0.51f);
GL.Vertex2(-0.75f, -0.51f);
GL.Vertex2(0.8f, -0.6f);
GL.Vertex2(0.7f, -0.4f);
GL.Vertex2(0.68f, -0.4f);
GL.Vertex2(0.78f, -0.6f);
GL.Vertex2(0.75f, -0.49f);
GL.Vertex2(0.65f, -0.49f);
GL.Vertex2(0.65f, -0.51f);
GL.Vertex2(0.75f, -0.51f);
GL.Vertex2(-0.69f, -0.38f);
GL.Vertex2(-0.64f, -0.28f);
GL.Vertex2(-0.62f, -0.28f);
GL.Vertex2(-0.67f, -0.38f);
GL.Vertex2(0.69f, -0.38f);
GL.Vertex2(0.64f, -0.28f);
GL.Vertex2(0.62f, -0.28f);
GL.Vertex2(0.67f, -0.38f);
//end red
//yellow
GL.Color4(1f, 1f, 0.0f, 1f);
GL.Vertex2(-0.63f, -0.25f);
GL.Vertex2(-0.53f, -0.05f);
GL.Vertex2(-0.51f, -0.05f);
GL.Vertex2(-0.61f, -0.25f);
GL.Vertex2(-0.58f, -0.14f);
GL.Vertex2(-0.48f, -0.14f);
GL.Vertex2(-0.48f, -0.16f);
GL.Vertex2(-0.58f, -0.16f);
GL.Vertex2(0.63f, -0.25f);
GL.Vertex2(0.53f, -0.05f);
GL.Vertex2(0.51f, -0.05f);
GL.Vertex2(0.61f, -0.25f);
GL.Vertex2(0.58f, -0.14f);
GL.Vertex2(0.48f, -0.14f);
GL.Vertex2(0.48f, -0.16f);
GL.Vertex2(0.58f, -0.16f);
GL.End();
GL.PopMatrix();
glControl2.Refresh();
}
private void serialPort1_DataReceived(object sender, System.IO.Ports.SerialDataReceivedEventArgs e)
{
bytein = serialPort1.ReadByte();
if(countdown==0){
if ((bytein & 1) == 1)
{
selectedCam = 1;
}
else if ((bytein & 2) == 2)
{
selectedCam = 2;
}
else if ((bytein & 8) == 8)
{
selectedCam = 4;
}
else if ((bytein & 4) == 4)
{
selectedCam = 3;
}
countdown = 20;
}
countdown--;
}
private void Form1_FormClosing_1(object sender, FormClosingEventArgs e)
{
videoSource1.Stop();
videoSource2.Stop();
videoSource3.Stop();
videoSource4.Stop();
}
}
}
【问题讨论】：
-
我看到的第一个 问题 是
videoFrame1虽然是 4，但您正在覆盖该值而不首先处理以前的值。 -
您几乎为您的应用程序发布了整个代码。我想知道您是否甚至设置了断点并逐步通过代码来确定哪些行可能导致错误和或问题.. 我怀疑您的代码/锁定线程部分有问题
-
@Matthew，这不仅会覆盖该位置的当前位图吗？
-
@MethodMan 没有这样的错误被调用，它只是填满了 ram，直到它不能再填满了，我遇到的问题是为什么它没有清除内存，或者询问我能做些什么来强制它清除它分配为“修改”的内存
-
@gmaann 分配给
null或覆盖该值不会在前一个对象上调用Dispose。如果对象实现了调用Dispose的终结器，它可能最终会被调用，但这超出了您的控制范围，并且对于何时发生（如果有的话）是不确定的。
标签： c# .net opengl memory-leaks bitmap