海康PlayM4 播放视频流

最新推荐文章于 2024-12-18 11:11:55 发布

原创最新推荐文章于 2024-12-18 11:11:55 发布 · 4.2k 阅读

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#海康 #c++ #sdk #windows

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这篇博客详细介绍了如何在C++中利用PlayM4库进行视频播放。首先，通过_threadex开启线程，然后在回调函数中设置播放窗口及模式。通过CStdioFile读取文件，调用PlayM4的相关函数如OpenStream、Play、InputData等进行流信息模拟播放。代码示例展示了实时播放视频的具体步骤。

1.playM4 下载地址

2.里面有文档说明，可以参考细节

3.实际应用实例


unsigned int CALLBACK thread(LPVOID lpVoid) {
	auto dlg = (CmfcDlg*)lpVoid;
	auto pic = dlg->GetDlgItem(IDC_STATIC);
	PlayFile(pic->GetSafeHwnd());
	return 1;
}

_beginthreadex(NULL, 0, thread, (LPVOID)this, 0, NULL); //开启线程

//模拟流信息 播放视频
void PlayFile(HWND hwnd) {
	CStdioFile file;
	file.Open("d:\\tmp\\test_rec.hikvision",
		CFile::modeNoTruncate |
		CFile::modeReadWrite |
		CFile::typeBinary); 

	const int rLen = 5128;
	BYTE *resendBuf = new BYTE[rLen];
	memset(resendBuf, 0, rLen); 
	int start = 1;
	auto ret = PlayM4_GetPort(&nPort);
	auto err = PlayM4_GetLastError(nPort);
	ret = PlayM4_SetStreamOpenMode(nPort, STREAME_REALTIME);  //设置模式
	err = PlayM4_GetLastError(nPort);
	while (true)
	{
		auto tLen = file.Read(resendBuf, rLen);
		if (start == 1) {  //初始化设置
			PlayM4_OpenStream(nPort, resendBuf, tLen, 2 * 1024 * 1024);
			auto ret = PlayM4_Play(nPort, hwnd);
			auto err = PlayM4_GetLastError(nPort);
		}
		else {
			PlayM4_InputData(nPort, resendBuf, tLen); 
		}
		if (tLen != rLen)
		{
			break;
		}
		if (start != 0)
		{
			start = 0;
		}
	}
	delete[] resendBuf;
	resendBuf = NULL; 
	file.Close();
}