Question

我正在研究如何将视频分成四个片段。我见过很多解决方案和库。我在看这个图书馆：

https://github.com/AydinAdn/MediaToolkit

这是分割视频的代码

var inputFile = new MediaFile {Filename = @"C:\Path\To_Video.flv"};
var outputFile = new MediaFile {Filename = @"C:\Path\To_Save_ExtractedVideo.flv"};

using (var engine = new Engine())
{
    engine.GetMetadata(inputFile);

    var options = new ConversionOptions();

    // This example will create a 25 second video, starting from the 
    // 30th second of the original video.
    //// First parameter requests the starting frame to cut the media from.
    //// Second parameter requests how long to cut the video.
    options.CutMedia(TimeSpan.FromSeconds(30), TimeSpan.FromSeconds(25));

    engine.Convert(inputFile, outputFile, options);
}

代码只拆分一个片段。有没有办法将它分成四个片段？

亲切的问候

PS：解决方案必须在C＃中，并且已经看过Directshow解决方案。

Answer 1

之前我没有使用过这个库，但这就是我要去做的。

var inputFile = new MediaFile {Filename = @"C:\Path\To_Video.flv"};
var outputName = "C:\Path\To_Save_ExtractedVideo";
var outputExtension = ".flv";

double t = inputFile.Length/4; //length of parts -- need to use method to get file playtime length

for(int i=0;i<4;i++){

    var engine = new Engine()
    engine.GetMetadata(inputFile);

    var options = new ConversionOptions();

    // This example will create a 25 second video, starting from the 
    // 30th second of the original video.
    //// First parameter requests the starting frame to cut the media from.
    //// Second parameter requests how long to cut the video.
    options.CutMedia(TimeSpan.FromSeconds(30 + (i*int.Parse(t))), TimeSpan.FromSeconds((i+1)*int.Parse(t)));

    engine.Convert(inputFile, $"{outputName}_{i.ToString()}{outputExtension}, options);

    engine.Destroy(); // Need to destroy object or close inputstream. Whichever the library offers

    }
}

Answer 2

它对我来说效果很好，但是我会修复算法，因为我错过了下面的最终视频，目前我的代码是这样的：

  static void Main(string[] args)
    {
        using (var engine = new Engine())
        {
            string file = @"C:\Users\wilso\Downloads\IZA - Meu Talismã.mp4";
            var inputFile = new MediaFile { Filename = file };
            engine.GetMetadata(inputFile);
            var outputName = @"C:\Users\wilso\Downloads\output";
            var outputExtension = ".mp4";
            double Duration = inputFile.Metadata.Duration.TotalSeconds;
            double currentPosition = 0;
            int contador = 0;
            while (currentPosition < Duration)
            {
                currentPosition = contador * 30;
                contador++;

                var options = new ConversionOptions();
                var outputFile = new MediaFile(outputName + contador.ToString("00") + outputExtension);

                options.CutMedia(TimeSpan.FromSeconds(currentPosition), TimeSpan.FromSeconds(30));

                engine.Convert(inputFile, outputFile, options);


            }
        }
    }

在C＃中分割四个文件中的视频

2 个答案: