// Construct a new DICOM dataset and populate required attributes
DicomDataSet ds = new DicomDataSet();
            
IFrameSource frameSource = new MpegFrameSource("mpeg.mpg");   
int frames = frameSource.CalculatedNumberOfFrames();
            
ds.Add(Keyword.Rows, 320);
ds.Add(Keyword.Columns, 560);
ds.Add(Keyword.BitsAllocated, 8);
ds.Add(Keyword.BitsStored, 8);
ds.Add(Keyword.HighBit, 7);
ds.Add(Keyword.SamplesPerPixel, 3);
ds.Add(Keyword.PixelRepresentation, 0); 
ds.Add(Keyword.PhotometricInterpretation, "YBR_PARTIAL_420");
ds.Add(Keyword.PlanarConfiguration, 0);     
ds.Add(Keyword.NumberOfFrames, frames);
            
ds.SetNonDicomCodec(frameSource);
            
// Example implementation of MpegFrameSource using Accord.Video.FFMPEG
public class MpegFrameSource : IFrameSource
{
    private readonly string _videoPath;
    private readonly int _frameCount;
            
    public MpegFrameSource(string path)
    {
        _videoPath = path;
            
        using (var reader = new VideoFileReader())
        {
            reader.Open(path);   
            int count = 0;
            while (true)
            {
                using (var frame = reader.ReadVideoFrame())
                {
                    if (frame == null)
                        break;
                    count++;
                }
            }
            _frameCount = count;
        }
    }
            
    public int CalculatedNumberOfFrames()
    {
        return _frameCount; 
    }
            
    public void ReadFrame(int frame0, Array result, int frameCount)
    {
        using (var reader = new VideoFileReader())
        {
            reader.Open(_videoPath);
            
            for (int i = 0; i <= frame0; i++)
            {
                using (var bmp = reader.ReadVideoFrame())
                {
                    if (i == frame0)
                    {
                        var rect = new Rectangle(0, 0, bmp.Width, bmp.Height);
                        var bmpData = bmp.LockBits(rect, ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
            
                        if (!(result is byte[] buffer))
                            throw new ArgumentException("Result must be a byte[]");
            
                        Marshal.Copy(bmpData.Scan0, buffer, 0, bmp.Width * bmp.Height * 3);
                        bmp.UnlockBits(bmpData);
                    }
                }
            }
        }
    }
            
    public IFrameSource Clone()
    {
        return new MpegFrameSource(_videoPath);
    }
}