DXGI高帧率屏幕录像软件源码解析（声音捕获，抓屏，ffmpeg录像，MP4录像，flv录像，麦克风采集）（第1篇API展示及使用部分）

本文DEMO源码下载：

(91条消息) dxgi桌面屏幕录像（windows屏幕录像，硬件编码，声音捕获，音视频同步）-编解码文档类资源-CSDN文库https://download.csdn.net/download/xjb2006/85109025

由于篇幅有限，分为4篇发表：

1、SDK接口一览：

2、声音采集部分:

3、屏幕捕获部分：

4、编码，录像部分：

距离上篇文章已经过了快1年了，才有时间把正式DEMO传上来，直接上个截图看看吧：

该DEMO演示了win10屏幕录像的核心功能，包含音源选择（支持麦克风，计算机声音和2者混合），屏幕选择（主副屏选择），鼠标，帧率，码率，硬件编码，实时预览，双录制（同时录制为flv,mp4）等基本功能。为了扩展需要，程序核心模块做成DLL动态库，可以多语言扩展，适用于C++，C#，JAVA，VB，Python等等其他语言。

SDK接口展示：

为方便其他语言和开发复用，将核心部件封装成了DLL：

xDxgiScreen.dll：负责屏幕采集

xScreenRecord.dll：负责音频采集，声音合成，音视频编码，音视频合成录像等

API一览：

typedef void (*pUserKey)(char* szUser,char* szKey);
typedef int (*pStartSendScreen)();
typedef void (*pStopSendScreen)();
typedef void (*pSetEncoderName)(char* name);//指定编码器
typedef void (*pSetEncoder)(int bps,double fps,int gop);
typedef void (*pSetIP)(char* szIP);
typedef int (*pGetCapMod)();
typedef int (*pGetEncoderID)();
typedef void(*pSetHaveCursor) (int nHave);
typedef void(*pSetMonitor) (int nMonitor);
typedef void(*pSetCapAudioType) (int nCapAudioType);
typedef void(*pSetVideoProperty)(int bps,int fps,int gop);
typedef void(*pStartRecord)(char *szMp4,char *szFlv);
typedef void(*pStopRecord)();
typedef int (*pOpenDxgi)();
typedef void(*pStartPreview)(int hWnd);
typedef void(*pStopPreview)();
typedef void(*pCloseAll)();
typedef bool(*pIsRecording)();
typedef int(*pGetMonitorCount)();
typedef int(*pGetMonitorWidth)(int nMonitorIndex);
typedef int(*pGetMonitorHeight)(int nMonitorIndex);


typedef struct tagScreenShareDll
{
	pUserKey UserKey;
	pStartSendScreen StartSendScreen;
	pStopSendScreen  StopSendScreen;
	pSetEncoderName SetEncoderName;
	pSetEncoder SetEncoder;
	pSetIP SetIP;
	pGetCapMod GetCapMod;
	pGetEncoderID GetEncoderID;
	pSetHaveCursor SetHaveCursor;
	pSetMonitor SetMonitor;
	pSetCapAudioType SetCapAudioType;
	pSetVideoProperty SetVideoProperty;
	pStartRecord StartRecord;
	pStopRecord StopRecord;
	pOpenDxgi OpenDxgi;
	pStartPreview StartPreview;
	pStopPreview StopPreview;
	pCloseAll CloseAll;
	pIsRecording IsRecording;
	pGetMonitorCount GetMonitorCount;
	pGetMonitorWidth GetMonitorWidth;
	pGetMonitorHeight GetMonitorHeight;

}SCREENSHAREDLL;

C++调用示例：

BOOL CScreenShareDlg::LoadScreenShareDll()
{
	CString szDll=GetExeFilePath()+L"xScreenRecord.dll";
	//HINSTANCE hDLL = LoadLibrary(szDll);
	HINSTANCE hDLL = LoadLibraryEx(szDll, NULL, LOAD_WITH_ALTERED_SEARCH_PATH);
	if(hDLL==0)
	{
		MessageBox(L"xScreenRecord.dll加载失败!");
		return false;
	}
	else
	{		
		m_screenrecord.UserKey= (pUserKey)GetProcAddress(hDLL, "UserKey");
		m_screenrecord.StartSendScreen = (pStartSendScreen)GetProcAddress(hDLL, "StartSendScreen");
		m_screenrecord.StopSendScreen = (pStopSendScreen)GetProcAddress(hDLL, "StopSendScreen");
		m_screenrecord.SetIP = (pSetIP)GetProcAddress(hDLL, "SetIP");
		m_screenrecord.SetEncoder = (pSetEncoder)GetProcAddress(hDLL, "SetEncoder");
		m_screenrecord.GetCapMod = (pGetCapMod)GetProcAddress(hDLL, "GetCapMod");
		m_screenrecord.GetEncoderID = (pGetEncoderID)GetProcAddress(hDLL, "GetEncoderID");
		m_screenrecord.SetHaveCursor = (pSetHaveCursor)GetProcAddress(hDLL, "SetHaveCursor");
		m_screenrecord.SetMonitor = (pSetMonitor)GetProcAddress(hDLL, "SetMonitor");
		m_screenrecord.SetCapAudioType = (pSetCapAudioType)GetProcAddress(hDLL, "SetCapAudioType");
		m_screenrecord.SetVideoProperty = (pSetVideoProperty)GetProcAddress(hDLL, "SetVideoProperty");
		m_screenrecord.StartRecord = (pStartRecord)GetProcAddress(hDLL, "StartRecord");
		m_screenrecord.StopRecord = (pStopRecord)GetProcAddress(hDLL, "StopRecord");
		m_screenrecord.OpenDxgi = (pOpenDxgi)GetProcAddress(hDLL, "OpenDxgi");
		m_screenrecord.StartPreview = (pStartPreview)GetProcAddress(hDLL, "StartPreview");
		m_screenrecord.StopPreview = (pStopPreview)GetProcAddress(hDLL, "StopPreview");
		m_screenrecord.CloseAll = (pCloseAll)GetProcAddress(hDLL, "CloseAll");
		m_screenrecord.GetMonitorCount = (pGetMonitorCount)GetProcAddress(hDLL, "GetMonitorCount");
		m_screenrecord.GetMonitorWidth = (pGetMonitorWidth)GetProcAddress(hDLL, "GetMonitorWidth");
		m_screenrecord.GetMonitorHeight = (pGetMonitorHeight)GetProcAddress(hDLL, "GetMonitorHeight");
		m_screenrecord.SetEncoderName = (pSetEncoderName)GetProcAddress(hDLL, "SetEncoderName");
		m_screenrecord.IsRecording = (pIsRecording)GetProcAddress(hDLL, "IsRecording");
		m_screenrecord.UserKey("test","test");
		//m_screenrecord.SetHaveCursor(0);
		int nMonitor=this->GetCheckedRadioButton(IDC_RADIO4,IDC_RADIO5)-IDC_RADIO4;	
		m_screenrecord.SetMonitor(nMonitor);
		m_screenrecord.OpenDxgi();
		m_screenrecord.StartPreview((int)m_vdlg.m_hWnd);
		
	}
	return true;
}

void CScreenShareDlg::OnBnClickedOk()
{
	if(m_recmin.GetChecked())
	{
		this->ShowWindow(SW_HIDE);
		ShowInTaskbar(this->GetSafeHwnd(),0);
	}

		int nCapAudioType=this->GetCheckedRadioButton(IDC_RADIO1,IDC_RADIO3)-IDC_RADIO1;
		int nMonitor=this->GetCheckedRadioButton(IDC_RADIO4,IDC_RADIO5)-IDC_RADIO4;
		int nOutFPS=this->GetCheckedRadioButton(IDC_RADIO10,IDC_RADIO12)-IDC_RADIO10;	
		int nOutKBPS=this->GetCheckedRadioButton(IDC_RADIO6,IDC_RADIO9)-IDC_RADIO6;	
		int nEncodeType=m_encodetype.GetChecked();
		
		if(m_screenrecord.SetEncoderName)
			m_screenrecord.SetEncoderName(nEncodeType?"":"libx264");
		m_screenrecord.SetCapAudioType(nCapAudioType);
		m_screenrecord.SetMonitor(nMonitor);
		m_screenrecord.SetVideoProperty(OutKBPS[nOutKBPS]*1024*1024,OutFPS[nOutFPS],OutFPS[nOutFPS]*3);
		m_screenrecord.StartRecord("c:\\mp4.mp4","c:\\flv.flv");
		int n0=m_screenrecord.GetCapMod();
		int n1=m_screenrecord.GetEncoderID();
		n1=n1;
		m_nStartTime=::GetTickCount();

		
}

C#调用示例：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Runtime.InteropServices;     // DLL support

namespace DXGIRecordTest
{
    public partial class Form1 : Form
    {
        [DllImport("user32.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void SetProcessDPIAware();


        //导入xScreenRecord.dll
        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void UserKey([In, Out] string user, [In, Out] string key);
        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void StartRecord([In, Out] string szMp4, [In, Out] string szFLv);
        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void StopRecord();

        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void SetHaveCursor([In, Out] int nHave);

        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void SetCapAudioType([In, Out] int nCapAudioType);

        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void SetMonitor([In, Out] int nMonitorIndex);

        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void SetVideoProperty([In, Out] int bps, [In, Out] int fps, [In, Out] int gop);
        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int OpenDxgi();
        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void StartPreview([In, Out] int hWnd);
        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void StopPreview();
        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int GetMonitorCount();
        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int GetMonitorWidth(int nMonitor);
        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern int GetMonitorHeight(int nMonitor);
        [DllImport("xScreenRecord.dll", CharSet = CharSet.Ansi, CallingConvention = CallingConvention.Cdecl)]
        public static extern void CloseAll();
        public Form1()
        {
            InitializeComponent();
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            SetProcessDPIAware();
            UserKey("test", "test");
            comboBox1.SelectedIndex = 0;
            comboBox2.SelectedIndex = 0;
            checkBox1.Checked = true;
            OpenDxgi();
            StartPreview((int)pictureBox1.Handle);
        }

        private void button1_Click(object sender, EventArgs e)//录像
        {
            comboBox2.Enabled = false;
            SetCapAudioType(comboBox1.SelectedIndex);//0麦克风 1计算机 2麦克风+计算机
            SetMonitor(comboBox2.SelectedIndex);//显示器序号
            SetHaveCursor(checkBox1.Checked==true?1:0);//是否录制鼠标
            SetVideoProperty(Convert.ToInt32(bps.Text)*1024*8, Convert.ToInt32(fps.Text), Convert.ToInt32(gop.Text));
            StartRecord("c:\\mp4.mp4","c:\\flv.flv");
        }

        private void button2_Click(object sender, EventArgs e)//停止
        {
            StopRecord();
            comboBox2.Enabled = true;
        }

        private void Form1_FormClosed(object sender, FormClosedEventArgs e)
        {
            CloseAll();
        }

        private void comboBox2_SelectedIndexChanged(object sender, EventArgs e)
        {
            int cx=GetMonitorWidth(comboBox2.SelectedIndex);
            int cy = GetMonitorHeight(comboBox2.SelectedIndex);
            label9.Text = comboBox2.Text + cx + "X" + cy;
            SetHaveCursor(checkBox1.Checked == true ? 1 : 0);
            SetMonitor(comboBox2.SelectedIndex);//显示器序号
            OpenDxgi();
            StartPreview((int)pictureBox1.Handle);
        }

        private void checkBox1_CheckedChanged(object sender, EventArgs e)
        {
            comboBox2_SelectedIndexChanged(sender,e);
        }


    }
}

本文DEMO源码下载：

(91条消息) dxgi桌面屏幕录像（windows屏幕录像，硬件编码，声音捕获，音视频同步）-编解码文档类资源-CSDN文库https://download.csdn.net/download/xjb2006/85109025

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