视频文件截图

发布于 2024-12-09 18:25:17 字数 592 浏览 0 评论 0原文

我正在尝试使用 mij 应用程序创建 powerpoint 演示文稿的屏幕截图。这不是最大的问题。我已经设法使用以下代码来做到这一点

    Bitmap memoryImage = new Bitmap(rc.Width, rc.Height,
                    PixelFormat.Format32bppArgb);

    using (Graphics memoryGrahics =
            Graphics.FromImage(memoryImage))
    {
        memoryGrahics.CopyFromScreen(rc.X, rc.Y,
            0, 0, rc.Size, CopyPixelOperation.SourceCopy);
    }
    return new Bitmap(memoryImage, 800, 600);

但是，当播放视频文件时，它只显示一个黑色方块。看起来媒体是在不同的层上播放的，因此没有被捕获。

如何使用视频图像创建屏幕截图？我搜索了很多有关 directx 或 windowsapicodepack 的信息，但我不完全知道这是否是正确的方法

原文

I am trying to create screenshots of a powerpoint presentation using mij application. This is not the biggest issue. I have managed to do so with the following code

    Bitmap memoryImage = new Bitmap(rc.Width, rc.Height,
                    PixelFormat.Format32bppArgb);

    using (Graphics memoryGrahics =
            Graphics.FromImage(memoryImage))
    {
        memoryGrahics.CopyFromScreen(rc.X, rc.Y,
            0, 0, rc.Size, CopyPixelOperation.SourceCopy);
    }
    return new Bitmap(memoryImage, 800, 600);

But, when a video file is being played it only shows a black square. It seems like the media is played on a different layer en thus not captured.

How can i create a screenshot with an image of the video? I searched alot about directx or windowsapicodepack but i don't exactly know if it is the right way to do this

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