什么'；这是使用C#从ASP.NETMVC中的视频文件中获取视频元数据的最佳方式

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

它获得了关于大多数媒体类型的大量信息，并且该库与一个易于使用的c#helper类捆绑在一起。

你可以从这里下载windows的库和助手类：

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

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复制到您的bin中。

用法

您可以通过向库请求特定参数来获取信息，下面是一个示例：

[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

        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"):即可查询所有参数

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

可能有点晚了。。。您可以使用MediaToolKit 的NuGet包，只需最少的代码就可以做到这一点

有关更多信息，请访问此处MediaToolKit

我建议您将ffmpeg与Process一起使用。首先，代码如下：

    private string GetVideoDuration(string ffmpegfile, string sourceFile) {
        using (System.Diagnostics.Process ffmpeg = new System.Diagnostics.Process()) {
            String duration;  // soon will hold our video's duration in the form "HH:MM:SS.UU"
            String result;  // temp variable holding a string representation of our video's duration
            StreamReader errorreader;  // StringWriter to hold output from ffmpeg
            // we want to execute the process without opening a shell
            ffmpeg.StartInfo.UseShellExecute = false;
            //ffmpeg.StartInfo.ErrorDialog = false;
            ffmpeg.StartInfo.WindowStyle = System.Diagnostics.ProcessWindowStyle.Hidden;
            // redirect StandardError so we can parse it
            // for some reason the output comes through over StandardError
            ffmpeg.StartInfo.RedirectStandardError = true;
            // set the file name of our process, including the full path
            // (as well as quotes, as if you were calling it from the command-line)
            ffmpeg.StartInfo.FileName = ffmpegfile;
            // set the command-line arguments of our process, including full paths of any files
            // (as well as quotes, as if you were passing these arguments on the command-line)
            ffmpeg.StartInfo.Arguments = "-i " + sourceFile;
            // start the process
            ffmpeg.Start();
            // now that the process is started, we can redirect output to the StreamReader we defined
            errorreader = ffmpeg.StandardError;
            // wait until ffmpeg comes back
            ffmpeg.WaitForExit();
            // read the output from ffmpeg, which for some reason is found in Process.StandardError
            result = errorreader.ReadToEnd();
            // a little convoluded, this string manipulation...
            // working from the inside out, it:
            // takes a substring of result, starting from the end of the "Duration: " label contained within,
            // (execute "ffmpeg.exe -i somevideofile" on the command-line to verify for yourself that it is there)
            // and going the full length of the timestamp
            duration = result.Substring(result.IndexOf("Duration: ") + ("Duration: ").Length, ("00:00:00").Length);
            return duration;
        }
    }

愿它有所帮助。

ffmpeg还提供了一个用于读取元数据的特殊应用程序ffprobe。我们为.net编写了一个包装器，并提供了一个nuget包，你可以在这里找到它：Alturos.VideoInfo

PM> Install-Package Alturos.VideoInfo

示例：

var videoFilePath = "myVideo.mp4";
var videoAnalyer = new VideoAnalyzer();
var analyzeResult = videoAnalyer.GetVideoInfo(videoFilePath);
var videoInfo = analyzeResult.VideoInfo;
//videoInfo.Format.Filename = "myVideo.mp4"
//videoInfo.Format.NbStreams = 1
//videoInfo.Format.NbPrograms = 0
//videoInfo.Format.FormatName = "mov,mp4,m4a,3gp,3g2,mj2"
//videoInfo.Format.FormatLongName = "QuickTime / MOV"
//videoInfo.Format.StartTime = 0
//videoInfo.Format.Duration = 120 //seconds
//videoInfo.Format.Size = 2088470 //bytes
//videoInfo.Format.BitRate = 139231
//videoInfo.Format.ProbeScore = 100
//videoInfo.Format.Tags["encoder"] = Lavf57.76.100
//videoInfo.Streams[0].CodecType = "video" //Video, Audio
//videoInfo.Streams[0]...