调用AForge库开发摄像头时发生的内存问题
先上代码吧，我在网上找了写资料然后封装了一个类
using System;using System.Collections.Generic;using System.Text;using System.Drawing;using AForge.Video.DirectShow;namespace Camera{ public delegate void NewFrameEventHandler(object sender, EventArgs e); public class WebCamera { public event NewFrameEventHandler NewFrameEvent; private FilterInfoCollection videoDevices; private VideoCaptureDevice videoSource = null; public bool DeviceExist { get; set; } private Image newFrame; public Image NewFrame { set { newFrame = value; } get { return newFrame; } } public WebCamera() { DeviceExist = false; } public List<DeviceCapabilityInfo> GetDeviceCapability(DeviceInfo deviceInfo) { List<DeviceCapabilityInfo> deviceCapability = new List<DeviceCapabilityInfo>(); VideoCaptureDevice video = new VideoCaptureDevice(deviceInfo.MonikerString); for (int i = 0; i < video.VideoCapabilities.Length; i++) { VideoCapabilities cap = video.VideoCapabilities[i]; DeviceCapabilityInfo capInfo = new DeviceCapabilityInfo(cap.FrameSize, cap.FrameRate); deviceCapability.Add(capInfo); } return deviceCapability; } public List<DeviceInfo> GetCameras() { List<DeviceInfo> cameraList = new List<DeviceInfo>(); videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice); int idx = 0; foreach (FilterInfo device in videoDevices) { cameraList.Add(new DeviceInfo(device.Name, device.MonikerString, idx, FilterCategory.VideoInputDevice)); idx++; } return cameraList; } public FilterInfoCollection VideoDevices { get { return videoDevices; } } public bool CloseVideo() { if (!(videoSource == null)) if (videoSource.IsRunning) { videoSource.SignalToStop(); videoSource.WaitForStop(); DeviceExist = false; } videoSource = null; return true; } public bool StartVideo(DeviceInfo device, DeviceCapabilityInfo info) { try { Size frameSize = info.FrameSize; int rate = info.MaxFrameRate; videoSource = new VideoCaptureDevice(device.MonikerString); videoSource.DesiredFrameSize = frameSize; videoSource.DesiredFrameRate = rate; videoSource.NewFrame += new AForge.Video.NewFrameEventHandler(videoSource_NewFrame); videoSource.Start(); DeviceExist = true; return true; } catch { return false; } } void videoSource_NewFrame(object sender, AForge.Video.NewFrameEventArgs eventArgs) { newFrame = (Image)eventArgs.Frame.Clone(); if (NewFrameEvent != null) { NewFrameEvent(this, new EventArgs()); } } } public class NewFrameEventArgs : EventArgs { public NewFrameEventArgs(Bitmap bitmap) { newFrame = bitmap; } Bitmap newFrame; public Bitmap NewFrame { get { return newFrame; } } } //设备信息 public class DeviceInfo { public string Name; public string MonikerString; public int Index; Guid Category; public DeviceInfo(string name, string monikerString, int index) : this(name, monikerString, index, Guid.Empty) { } public DeviceInfo(string name, string monikerString, int index, Guid category) { Name = name; MonikerString = monikerString; Index = index; Category = category; } public override string ToString() { return Name; } } //设备能力 public class DeviceCapabilityInfo { public Size FrameSize; public int MaxFrameRate; public DeviceCapabilityInfo(Size frameSize, int maxFrameRate) { FrameSize = frameSize; MaxFrameRate = maxFrameRate; } public override string ToString() { return string.Format("{0}x{1} {2}fps", FrameSize.Width, FrameSize.Height, MaxFrameRate); } }
void videoSource_NewFrame(object sender, AForge.Video.NewFrameEventArgs eventArgs) { newFrame = (Image)eventArgs.Frame.Clone(); if (NewFrameEvent != null) { NewFrameEvent(this, new EventArgs()); } }