我需要在我的电脑上下载我刚刚录制的视频。我设法用图片做到了,但对于视频,我只得到一个空文件。
我已经注册了对象事件处理程序
err = EDSDK.EdsSetObjectEventHandler(cameraDev, EDSDK.ObjectEvent_All, objectEventHandler, new IntPtr(0));
然后,我开始录制:
public void StartRecording(int sec)
{
// set the timer, surement à mettre dans les config, plutot
System.Timers.Timer aTimer = new System.Timers.Timer(sec * 1000);
aTimer.Elapsed += new ElapsedEventHandler(OnTimedEvent);
GC.KeepAlive(aTimer);
err = EDSDK.EdsSetPropertyData(cameraDev, EDSDK.PropID_Record, 0, 4, 4);
aTimer.Start();
}
private void OnTimedEvent(object source, ElapsedEventArgs e)
{
StopRecording();
}
public void StopRecording()
{
err = EDSDK.EdsSetPropertyData(cameraDev, EDSDK.PropID_Record, 0, 4, 0);
}
对象事件处理程序:
public uint objectEventHandler(uint inEvent, IntPtr inRef, IntPtr inContext)
{
switch (inEvent)
{
case EDSDK.ObjectEvent_DirItemCreated:
DownloadImage(inRef, inContext);
break;
}
return 0;
}
最后,downolad
void DownloadImage(IntPtr DirectoryRef, IntPtr inContext)
{
IntPtr stream = IntPtr.Zero;
IntPtr data = IntPtr.Zero;
EDSDK.EdsDirectoryItemInfo dirItemInfo;
uint err;
try
{
err = EDSDK.EdsGetDirectoryItemInfo(DirectoryRef, out dirItemInfo);
err = EDSDK.EdsCreateFileStream(dirItemInfo.szFileName,
EDSDK.EdsFileCreateDisposition.CreateAlways, EDSDK.EdsAccess.ReadWrite, out stream);
// does not work
err = EDSDK.EdsSetProgressCallback(stream, progressFunc, EDSDK.EdsProgressOption.Periodically, inContext);
// Fill the stream with the resulting image
err = EDSDK.EdsDownload(DirectoryRef, dirItemInfo.Size, stream);
if (err == EDSDK.EDS_ERR_OK)
{
err = EDSDK.EdsDownloadComplete(DirectoryRef);
}
else
{
err = EDSDK.EdsDownloadCancel(DirectoryRef);
}
if ((stream == null) == false)
{
err = EDSDK.EdsRelease(stream);
stream = IntPtr.Zero;
}
}
catch (Exception ex)
{
throw new Exception(String.Format("EDSDK Error : {0}", ex.Message));
}
EDSDK.EdsRelease(stream);
}
在调试模式下,方法 EDSDK.EdsDownload 永远不会结束,但是没有异常,或者返回码...
请帮忙 !