private void btnDownloadName_Click(object sender, EventArgs e)
{
if (m_lDownHandle >= 0)
{
MessageBox.Show("Downloading, please stop firstly!");//正在下载，请先停止下载
return;
}
string sVideoFileName; //录像文件保存路径和文件名 the path and file name to save
sVideoFileName = "Downtest_" + sPlayBackFileName + ".mp4";
//按文件名下载 Download by file name
m_lDownHandle = CHCNetSDK.NET_DVR_GetFileByName(m_lUserID, sPlayBackFileName, sVideoFileName);
if (m_lDownHandle < 0)
{
iLastErr = CHCNetSDK.NET_DVR_GetLastError();
str = "NET_DVR_GetFileByName failed, error code= " + iLastErr;
MessageBox.Show(str);
return;
}
uint iOutValue = 0;
if (!CHCNetSDK.NET_DVR_PlayBackControl_V40(m_lDownHandle, CHCNetSDK.NET_DVR_PLAYSTART, IntPtr.Zero, 0, IntPtr.Zero, ref iOutValue))
{
iLastErr = CHCNetSDK.NET_DVR_GetLastError();
str = "NET_DVR_PLAYSTART failed, error code= " + iLastErr; //下载控制失败，输出错误号
MessageBox.Show(str);
return;
}
timerDownload.Interval = 1000;
timerDownload.Enabled = true;
btnStopDownload.Enabled = true;
}
public void Download(string sPlayBackFileName)
{
if (DownloadHandle >= 0)
{
throw new Exception("正在下载，请先停止下载！");
}
var sVideoFileName = sPlayBackFileName + ".mp4";
//按文件名下载 Download by file name
DownloadHandle = CHCNetSDK.NET_DVR_GetFileByName(UserId, sPlayBackFileName, sVideoFileName);
if (DownloadHandle < 0)
{
var iLastErr = NET_DVR_GetLastError();
throw new Exception("NET_DVR_GetFileByName failed, error code= " + iLastErr);
}
uint iOutValue = 0;
if (!CHCNetSDK.NET_DVR_PlayBackControl_V40(DownloadHandle, CHCNetSDK.NET_DVR_PLAYSTART, IntPtr.Zero, 0, IntPtr.Zero, ref iOutValue))
{
var iLastErr = NET_DVR_GetLastError();
throw new Exception("NET_DVR_PLAYSTART failed, error code= " + iLastErr);
}
}
private async Task <Boolean> DownloadRecording(Recording recording)
{
if (_mLDownHandle >= 0)
{
Console.WriteLine("Error, already downloading!");
return(false);
}
var sVideoFileName = _outputLocationPath + recording.GetFileName() + _videoExtension;
Console.WriteLine("Downloading: " + recording.GetFileName());
// Download from nvr/camera by file name
_mLDownHandle = CHCNetSDK.NET_DVR_GetFileByName(_mLUserId, recording.GetFileName(),
sVideoFileName);
if (_mLDownHandle < 0)
{
_iLastErr = CHCNetSDK.NET_DVR_GetLastError();
_errorMsg = "NET_DVR_GetFileByName failed, error code= " + _iLastErr;
Console.WriteLine(_errorMsg);
if (_iLastErr == 34) // Target folder does not exist, create it
{
System.IO.Directory.CreateDirectory(_outputLocationPath);
}
return(false);
}
uint iOutValue = 0;
if (!CHCNetSDK.NET_DVR_PlayBackControl_V40(_mLDownHandle, CHCNetSDK.NET_DVR_PLAYSTART,
IntPtr.Zero, 0, IntPtr.Zero, ref iOutValue))
{
_iLastErr = CHCNetSDK.NET_DVR_GetLastError();
_errorMsg = "NET_DVR_PLAY_START failed, error code= " +
_iLastErr; // Download controlling failed, print error code
Console.WriteLine(_errorMsg);
return(false);
}
var downloadProgress = 0;
while (downloadProgress < 100)
{
// Get downloading process
downloadProgress = CHCNetSDK.NET_DVR_GetDownloadPos(_mLDownHandle);
Thread.Sleep(1 * 1000);
Console.WriteLine("Download progress: " + downloadProgress + "%");
}
_mLDownHandle = -1;
return(true);
}
public int DownloadVideoRecordByFile(int userId, string videoFileName, string fullPath)
{
int downloadHandle = CHCNetSDK.NET_DVR_GetFileByName(userId, videoFileName, fullPath);
if (downloadHandle < 0)
{
uint iLastErr = CHCNetSDK.NET_DVR_GetLastError();
string str = "NET_DVR_GetFileByName failed, error code= " + iLastErr;
return(-1);
}
uint iOutValue = 0;
if (!CHCNetSDK.NET_DVR_PlayBackControl_V40(downloadHandle, CHCNetSDK.NET_DVR_PLAYSTART, IntPtr.Zero, 0, IntPtr.Zero, ref iOutValue))
{
uint iLastErr = CHCNetSDK.NET_DVR_GetLastError();
string str = "NET_DVR_PLAYSTART failed, error code= " + iLastErr;
return(-1);
}
return(downloadHandle);
}