我想通过网络摄像头录制视频使用Directshow.Net.i能够使用ASFWriter录制视频,但随着录制我希望将视频流传输到局域网中的PC ..我试过这个..
我运行的项目我开发用于录制视频这是代码
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 DirectShowLib;
using DirectShowLib.DMO;
using System.Runtime.InteropServices;
using System.Drawing.Drawing2D;
using System.IO;
namespace Cam_Recording_V1_directshow.net_
{
public partial class Form1 : Form
{
string captureDeviceName = string.Empty;
IFilterGraph2 Graph = null;
IMediaControl m_mediaCtrl = null;
public List<DsDevice> AvailableVideoInputDevices { get; private set; }
IAMVideoProcAmp vpa;
[DllImport("olepro32.dll", CharSet = CharSet.Unicode, ExactSpelling = true)]
private static extern int OleCreatePropertyFrame(IntPtr hwndOwner, int x, int y,
string lpszCaption, int cObjects,
[In, MarshalAs(UnmanagedType.Interface)] ref object ppUnk,
int cPages, IntPtr pPageClsID, int lcid, int dwReserved, IntPtr pvReserved);
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
IBaseFilter capFilter = null;
IBaseFilter asfWriter = null;
IFileSinkFilter pTmpSink = null;
ICaptureGraphBuilder2 captureGraph = null;
object o;
//
//Get list of video devices
//
AvailableVideoInputDevices = new List<DsDevice>();
DsDevice[] videoInputDevices = DsDevice.GetDevicesOfCat(FilterCategory.VideoInputDevice);
AvailableVideoInputDevices.AddRange(videoInputDevices);
if (AvailableVideoInputDevices.Count > 0)
{
//
//init capture graph
//
Graph = (IFilterGraph2)new FilterGraph();
captureGraph = (ICaptureGraphBuilder2)new CaptureGraphBuilder2();
//
//sets filter object from graph
//
captureGraph.SetFiltergraph(Graph);
//
//which device will use graph setting
//
Graph.AddSourceFilterForMoniker(AvailableVideoInputDevices.First().Mon, null, AvailableVideoInputDevices.First().Name, out capFilter);
captureDeviceName = AvailableVideoInputDevices.First().Name;
#region WMV
//
//sets output file name,and file type
//
captureGraph.SetOutputFileName(MediaSubType.Asf, /*DateTime.Now.Ticks.ToString() +".wmv"*/ "test.wmv", out asfWriter, out pTmpSink);
//
//configure which video setting is used by graph
//
IConfigAsfWriter lConfig = asfWriter as IConfigAsfWriter;
Guid cat = new Guid("8C45B4C7-4AEB-4f78-A5EC-88420B9DADEF");
lConfig.ConfigureFilterUsingProfileGuid(cat);
#endregion
captureGraph.RenderStream(PinCategory.Preview, MediaType.Video, capFilter, null, null);
captureGraph.RenderStream(PinCategory.Capture, MediaType.Video, capFilter, null, asfWriter);
m_mediaCtrl = Graph as IMediaControl;
m_mediaCtrl.Run();
}
else
{
MessageBox.Show("Video Capture Device Not Found!!");
button1.Visible = false;
}
}
这将启动视频录制。之后我从“Release”文件夹运行this项目exe,它将出现“媒体运行失败”等错误
现在我的问题是否可以同时进行录制和直播?
如果是,那么请引导我完成这个......还请指导我这个post
答案 0 :(得分:1)
我认为您应该手动构建图表。该图应该看起来像下面的图表。您可以使用GraphEdt测试图表。这也有助于获得Guid和PinNames。
VideoSource -> SmartTee -> StreamingFilter
-> CaptureFilter
DirectShowLib提供了构建图形所需的所有功能。
您可以像在示例中一样创建过滤器。可以直接创建SmartTee过滤器。
您应该使用graph.Connect()方法连接过滤器。使用此功能,您可以使用SmartTee过滤器构建以下图形。 SmartTee过滤器应该在您的系统上可用,并提供两个输出引脚,一个用于捕获,另一个用于预览。您应该使用preveiw引脚作为Streaming,使用捕获引脚作为Capture过滤器。
您可以使用以下函数获取连接方法所需的Pin:
public IPin GetPin(IBaseFilter filter, string pinname)
{
IEnumPins epins;
int hr = filter.EnumPins(out epins);
if(hr < 0)
return null;
IntPtr fetched = Marshal.AllocCoTaskMem(4);
IPin[] pins = new IPin[1];
epins.Reset();
while (epins.Next(1, pins, fetched) == 0)
{
PinInfo pinfo;
pins[0].QueryPinInfo(out pinfo);
bool found = (pinfo.name == pinname);
DsUtils.FreePinInfo(pinfo);
if (found)
return pins[0];
}
return null;
}
最后,你必须启动图表,一切都会有希望。在每次调用错误处理的方法之后检查hr代码是很重要的。