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• LoaderLock error in videoreader [duplicate]

  22 août 2016, par Naseer Ahmed

  This question already has an answer here :

  • Loader lock error
    
    7 answers
    

  I am getting Following Error

  

  Following is my code

  private void btnVideoBrowse_Click(object sender, EventArgs e)
  
      {
  
          string videoPath = @"******\video.mp4";
  
          VideoFileReader reader = new VideoFileReader();
  
          reader.Open(videoPath);
  
          Bitmap videoFrame = reader.ReadVideoFrame();
  
          pcBoxImage.Image = videoFrame;
  
          videoFrame.Dispose();
  
          reader.Close();
  
      }

  Update

  So I tried to use another method

  VideoFileSource video = new VideoFileSource(@"******\video.mp4");

  But I got the same error.

• Merge commit 'fd8de7f2d8c31195d309247cb129c0ad787ef76e'

  19 mai 2017, par Clément Bœsch

  Merge commit 'fd8de7f2d8c31195d309247cb129c0ad787ef76e'
  * commit 'fd8de7f2d8c31195d309247cb129c0ad787ef76e' :
  
    dxtory : Convert to the new bitstream reader
  
    apedec : Convert to the new bitstream reader
  This commit is a noop, see
  
  http://ffmpeg.org/pipermail/ffmpeg-devel/2017-April/209609.html
  Merged-by : Clément Bœsch <u@pkh.me>
  

• Picturebox from AForge FFMPEG empty - C#/WinForms

  1er août 2017, par Jake Delson

  I’ve done a ton of research and looked at a lot of questions here but can’t seem to find anything to help me. I should preface I’m very new to C#, Windows Forms, and SO ! I’m a 1st year CompSci student coming from C++ experimenting with my own projects for the summer. I’m trying to display a series of bitmaps from a .avi using the AForge.Video.FFMPEG video file reader.

  It seems to be finding the file, getting its’ data (console prints dimensions, framerate, and codec) and creating the picturebox, but the picturebox comes up blank/empty. I get the bitmap from the frames of a .avi :

  From AForge example code here

  Then I’m trying to display it with a picture box :

  From MS example code here as well

  And here’s my code. Essentially a combination of the two :

      public class Simple : Form
  
  {
  
      Bitmap videoFrame;
  
  
  
      public Simple()
  
      {
  
          try
  
          {
  
              // create instance of video reader
  
              VideoFileReader reader = new VideoFileReader();
  
              // open video file
  
              reader.Open(@"C:\Users\User\Desktop\ScanTest3.AVI");
  
              // check some of its attributes
  
              Console.WriteLine("width:  " + reader.Width);
  
              Console.WriteLine("height: " + reader.Height);
  
              Console.WriteLine("fps:    " + reader.FrameRate);
  
              Console.WriteLine("codec:  " + reader.CodecName);
  
  
  
              PictureBox pictureBox1 = new PictureBox();
  
  
  
              // read 100 video frames out of it
  
              for (int i = 0; i < 100; i++)
  
              {
  
                  videoFrame = reader.ReadVideoFrame();
  
  
  
                  pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
  
                  pictureBox1.ClientSize = new Size(videoFrame.Width, videoFrame.Height);
  
                  pictureBox1.Image = videoFrame;
  
  
  
                  // dispose the frame when it is no longer required
  
                  videoFrame.Dispose();
  
              }
  
  
  
              reader.Close();
  
          }
  
  
  
          catch
  
          {
  
              Console.WriteLine("Nope");
  
          }
  
  
  
      }
  
  }
  
  
  
  class MApplication
  
  {
  
      public static void Main()
  
      {
  
          Application.Run(new Simple());
  
      }
  
  }

  So that’s it pretty much. Just a blank picture box coming up, when it should have the first frame of the video, even though no exception caught (though I’m pretty confident I’m using the try/catch very poorly), and the console printing the correct data for the file :

  width:  720
  
  height: 480
  
  fps:    29
  
  codec:  dvvideo
  
  [swscaler @ 05E10060] Warning: data is not aligned! This can lead to a speedloss

  Though if anyone could tell me what that warning means, that would be great as well, but I’m mainly just lost as to why there’s no picture printing to the screen.

  Thanks !