具有索引像素格式的图形运行时错误 [英] Graphics with indexed pixel format run time error

问题描述

好的所以我有两个摄像头，我的软件正在使用。第一个是电脑摄像头。当我连接并运行此代码时：

  Bitmap currentFrame = videoSourcePlayer.GetCurrentVideoFrame();
        Graphics g = Graphics.FromImage(currentFrame);

        g.DrawImage(currentFrame, videoSourcePlayer.imagex, videoSourcePlayer.imagey, videoSourcePlayer.imgWidth, videoSourcePlayer.imgHeight);
        pictureBox1.Image = currentFrame;
        return currentFrame;

网络摄像头正常工作。我可以复制我的缩放和平移，就好了。

the webcam works fine. I am able to copy my zoom and pan, just fine.

但是当我连接到另一个cam并运行相同的代码时，我收到此错误： HResult = 0x80131500消息=无法从具有索引像素格式的图像创建图形对象。 Source = System.Drawing StackTrace：at System.Drawing.Graphics.FromImage（Image
image）

but when I connect to the other cam and run the same code, I get this error : HResult=0x80131500 Message=A Graphics object cannot be created from an image that has an indexed pixel format. Source=System.Drawing StackTrace: at System.Drawing.Graphics.FromImage(Image image)

所以我尝试了这段代码：

so I tried this code :

private Bitmap CaptureScreen()
    {
        Bitmap originalBmp = videoSourcePlayer.GetCurrentVideoFrame();

        // Create a blank bitmap with the same dimensions
        Bitmap tempBitmap = new Bitmap(originalBmp.Width, originalBmp.Height);

        // From this bitmap, the graphics can be obtained, because it has the right PixelFormat
        using (Graphics g = Graphics.FromImage(tempBitmap))
        {

            g.DrawImage(originalBmp, videoSourcePlayer.imagex, videoSourcePlayer.imagey, videoSourcePlayer.imgWidth, videoSourcePlayer.imgHeight);
            pictureBox1.Image = originalBmp;
            return originalBmp;
        }
    }

代码修复运行时错误，我得到但是摆脱我的变焦和平移。我不知道为什么？但我确实有一个缩放和平移功能，适用于第一个代码块但不适用于第二个。

that code fix the runtime error, I get but is get rid of my zoom and pan. I do not know why? but I do have a zoom and pan function that works with the 1st code block but not with the second.

如何修复A Graphics对象不能从具有索引像素格式运行时错误的图像创建，但保持我的缩放和平移？

how can I fix the A Graphics object cannot be created from an image that has an indexed pixel format runtime error but keep my zoom and pan?

推荐答案

也许在第二种情况下你应该写：

<跨度>&NBSP;&NBSP; pictureBox1.Image = tempBitmap;

   pictureBox1.Image = tempBitmap;

   返回tempBitmap;

   return tempBitmap;

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