获得在C＃中的视频文件的缩略图 [英] Get thumbnail image of video file in C#

问题描述

我要显示在我的网站上列出的视频缩略图，我想从一个视频（从一个特定的时间）获取一个单帧并显示为缩略图。

I want to display thumbnails for videos listed on my site, I want to fetch a single frame from a video (from a particular time) and display them as thumbnails.

我也试试这个的http：// ramcrishna。 blogspot.com/2008/09/playing-videos-like-youtube-and.html 但不工作。

I have try this http://ramcrishna.blogspot.com/2008/09/playing-videos-like-youtube-and.html but is not working.

这是可能的使用.NET C＃？

Is that possible using .NET C#?

推荐答案

您可以通过编程执行 FFmpeg的生成缩略图文件。然后打开图像文件，但是你想使用它。

You can programmatically execute FFmpeg to generate a thumbnail image file. Then open the image file to use it however you wish.

下面是一些示例code：

Here is some sample code:

public static Bitmap GetThumbnail(string video, string thumbnail)
{
    var cmd = "ffmpeg  -itsoffset -1  -i " + '"' + video + '"' + " -vcodec mjpeg -vframes 1 -an -f rawvideo -s 320x240 " + '"' + thumbnail + '"';

    var startInfo = new ProcessStartInfo
    {
        WindowStyle = ProcessWindowStyle.Hidden,
        FileName = "cmd.exe",
        Arguments = "/C " + cmd
    };

    var process = new Process
    {
        StartInfo = startInfo
    };

    process.Start();
    process.WaitForExit(5000);

    return LoadImage(thumbnail);
}

static Bitmap LoadImage(string path)
{
    var ms = new MemoryStream(File.ReadAllBytes(path));
    return (Bitmap)Image.FromStream(ms);
}

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