如何获取录制视频的缩略图 - windows phone 8? [英] How to get the thumbnail of a recorded video - windows phone 8?
本文介绍了如何获取录制视频的缩略图 - windows phone 8?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我已经使用 CaptureSource()
录制了本主题中的视频 如何在适用于 Windows Phone 的相机应用程序中录制视频,但我无法获取录制视频的缩略图.
I've used CaptureSource()
to record a video like in this Topic How to record video in a camera app for Windows Phone, but I can't get the thumbnail of the recorded video.
推荐答案
解决方案如下:
[...]
// Add eventhandlers for captureSource.
captureSource.CaptureFailed += new EventHandler<ExceptionRoutedEventArgs>(OnCaptureFailed);
captureSource.CaptureImageCompleted += captureSource_CaptureImageCompleted;
[...]
captureSource.Start();
captureSource.CaptureImageAsync();
[...]
void captureSource_CaptureImageCompleted(object sender, CaptureImageCompletedEventArgs e)
{
using (IsolatedStorageFile isoStore = IsolatedStorageFile.GetUserStoreForApplication())
{
System.Windows.Media.Imaging.WriteableBitmap wb = e.Result;
string fileName = "CameraMovie.jpg";
if (isoStore.FileExists(fileName))
isoStore.DeleteFile(fileName);
IsolatedStorageFileStream file = isoStore.CreateFile(fileName);
System.Windows.Media.Imaging.Extensions.SaveJpeg(wb, file, wb.PixelWidth, wb.PixelHeight, 0, 85);
file.Close();
}
}
更新:让用户可以在需要时获取缩略图
向 viewfinderRectangle
<Rectangle
x:Name="viewfinderRectangle"
[...]
Tap="viewfinderRectangle_Tap" />
在该 Tap 事件中调用 captureSource.CaptureImageAsync();
Call captureSource.CaptureImageAsync();
in that Tap event
private void viewfinderRectangle_Tap(object sender, System.Windows.Input.GestureEventArgs e)
{
captureSource.CaptureImageAsync();
}
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