使用C#从ASP.Net MVC中的视频文件中获取视频元数据的最佳方法是什么? [英] What's the best way to get video metadata from a video file in ASP.Net MVC using C#?

问题描述

我已经在Google和StackOverflow上搜索了好几个小时.在StackOverflow上似乎有很多类似的问题，但它们都存在大约3-5年.

I've been searching on Google and StackOverflow for a good couple of hours. There seems to be a lot of similar questions on StackOverflow but they are all about 3-5 years old.

如今，使用FFMPEG还是从.NET Web应用程序中的视频文件中提取元数据的最佳方法吗?如果是这样，那里最好的C#包装器是什么?

Is using FFMPEG still the best way these days to pull metadata from a video file in a .NET web application? And if so, what's the best C# wrapper out there?

我已经尝试了MediaToolkit，MediaFile.dll，但没有任何运气.我看到了ffmpeg-csharpe，但看起来好像几年都没碰过.

I've tried MediaToolkit, MediaFile.dll without any luck. I saw ffmpeg-csharpe but that looks like it hasn't been touched in a few years.

我尚未找到有关此主题的任何最新数据.现在是否可以从内置到最新版本的.NET的视频中提取元数据?

I haven't found any current data on this subject. Is the ability to pull metadata from a video built into the latest version of .NET now?

我现在基本上正在寻找任何方向.

I'm basically looking for any direction at this point.

我应该补充一点，就是我所使用的任何内容都可以每小时被调用数千次，因此它必须高效.

I should add that whatever I use could be invoked thousands of times per hour so it will need to be efficient.

推荐答案

看看MediaInfo项目( http://mediaarea. net/zh/MediaInfo )

它获取有关大多数媒体类型的广泛信息，并且该库与易于使用的c#helper类捆绑在一起.

it gets extensive information about most media types, and the library is bundled with a c# helper class which is easy to use.

您可以从此处下载Windows的库和帮助程序类:

You can download the library and helper class for windows from here:

http://mediaarea.net/en/MediaInfo/Download/Windows (没有DLL的安装程序)

helper类位于Developers\Source\MediaInfoDLL\MediaInfoDLL.cs，只需将其添加到您的项目中，然后将MediaInfo.dll复制到bin中即可.

The helper class is located at Developers\Source\MediaInfoDLL\MediaInfoDLL.cs, simply add it to your project and copy the MediaInfo.dll to your bin.

用法

您可以通过从库中请求特定参数来获取信息，这是一个示例:

you can obtain information by requesting specific parameter from the library, Here is a sample:

[STAThread]
static void Main(string[] Args)
{
    var mi = new MediaInfo();
    mi.Open(@"video path here");

    var videoInfo = new VideoInfo(mi);
    var audioInfo = new AudioInfo(mi);
     mi.Close();
}

public class VideoInfo 
{
    public string Codec { get; private set; }
    public int Width { get; private set; }
    public int Heigth { get; private set; }
    public double FrameRate { get; private set; }
    public string FrameRateMode { get; private set; }
    public string ScanType { get; private set; }
    public TimeSpan Duration { get; private set; }
    public int Bitrate { get; private set; }
    public string AspectRatioMode { get; private set; }
    public double AspectRatio { get; private set; }

    public VideoInfo(MediaInfo mi)
    {
        Codec=mi.Get(StreamKind.Video, 0, "Format");
        Width = int.Parse(mi.Get(StreamKind.Video, 0, "Width"));
        Heigth = int.Parse(mi.Get(StreamKind.Video, 0, "Height"));
        Duration = TimeSpan.FromMilliseconds(int.Parse(mi.Get(StreamKind.Video, 0, "Duration")));
        Bitrate = int.Parse(mi.Get(StreamKind.Video, 0, "BitRate"));
        AspectRatioMode = mi.Get(StreamKind.Video, 0, "AspectRatio/String"); //as formatted string
        AspectRatio =double.Parse(mi.Get(StreamKind.Video, 0, "AspectRatio"));
        FrameRate = double.Parse(mi.Get(StreamKind.Video, 0, "FrameRate"));
        FrameRateMode = mi.Get(StreamKind.Video, 0, "FrameRate_Mode");
        ScanType = mi.Get(StreamKind.Video, 0, "ScanType");
    }
}

public class AudioInfo
{
    public string Codec { get; private set; }
    public string CompressionMode { get; private set; }
    public string ChannelPositions { get; private set; }
    public TimeSpan Duration { get; private set; }
    public int Bitrate { get; private set; }
    public string BitrateMode { get; private set; }
    public int SamplingRate { get; private set; }

    public AudioInfo(MediaInfo mi)
    {
        Codec = mi.Get(StreamKind.Audio, 0, "Format");
        Duration = TimeSpan.FromMilliseconds(int.Parse(mi.Get(StreamKind.Audio, 0, "Duration")));
        Bitrate = int.Parse(mi.Get(StreamKind.Audio, 0, "BitRate"));
        BitrateMode = mi.Get(StreamKind.Audio, 0, "BitRate_Mode");
        CompressionMode = mi.Get(StreamKind.Audio, 0, "Compression_Mode");
        ChannelPositions = mi.Get(StreamKind.Audio, 0, "ChannelPositions");
        SamplingRate = int.Parse(mi.Get(StreamKind.Audio, 0, "SamplingRate"));
    }
}

您可以通过调用Inform()轻松获得字符串格式的所有信息:

You can easily obtain all information in string format by callingInform():

        var mi = new MediaInfo();
        mi.Open(@"video path here");
        Console.WriteLine(mi.Inform());
        mi.Close();

如果您需要有关可用参数的更多信息，只需调用Options("Info_Parameters")即可简单查询所有参数:

if you need more information about available parameters, you can simply query all of them by calling Options("Info_Parameters"):

        var mi = new MediaInfo();
        Console.WriteLine(mi.Option("Info_Parameters"));
        mi.Close();

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