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• Is there any way to detect and cut out the real video part from a full video

  27 octobre 2020, par Jemma.Z

  Not sure whether I can explain my question. I have a bunch of video material. Some of them are recorded videos from mobile phones. When people record the video on their phone, their produced video may contain more than just the recorded video I need. I need to detect and cut out the useless part. The useless part would be still while the part I need is changing and on the play.

  


  I do not know whether there is any way for me to do it. I can write some code but I just do not know what libraries to use. Does it have something to do with OpenCV. Or is there a way to solve it with ffmpeg ?

  


  Hopefully someone can give me some ideas. Thanks a lot.

  


• Can't record full screen using FFMEG Video File Writer - C#

  2 avril 2019, par nsds

  My app need to record entire screen as video. For that I have installed

  AForge.Video.FFMPEG

  and did like below. Now I can record the screen. But some bottom area and right end area of screen is missing. Can anyone suggest what causes the issue ? I want to record the entire screen.

  SystemInformation.VirtualScreen

  is used to calculate screen size. it is getting as 1536*864

    private ScreenCaptureStream _streamVideo;
  
    private VideoFileWriter _Screenwriter;
  
    private Rectangle _screenArea;
  
    private bool _isScreenRecording;
  
    private int _Screenwidth;
  
    private int _Screenheight;
  
    public RecordVideo()
  
      {
  
          InitializeComponent(); 
  
          this._Screenwriter = new VideoFileWriter();
  
          this._Screenwidth = SystemInformation.VirtualScreen.Width;
  
          this._Screenheight = SystemInformation.VirtualScreen.Height;
  
          this._isScreenRecording = false;
  
          this._screenArea = Rectangle.Empty;
  
        }
  
   private void btn_startRecord_Click(object sender, EventArgs e)
  
      {
  
          try
  
          {        
  
          if (btn_screenRecord.Text == "Record")
  
          {
  
              FolderBrowserDialog fbd = new FolderBrowserDialog();
  
              if (fbd.ShowDialog() == DialogResult.OK)
  
              {
  
                  _isScreenRecording = true;
  
                  this.StartRecScreen(fbd.SelectedPath);
  
              }
  
          }
  
          else
  
          {
  
              _isScreenRecording = false;
  
              btn_screenRecord.Text = "Record";
  
              MessageBox.Show(@"Recorded !");
  
          }
  
          }
  
          catch (Exception EX)
  
          { MessageBox.Show(EX.Message); }
  
      }
  
  
  
  private void StartRecScreen(string path)
  
      {
  
         btn_screenRecord.Text = "Stop";
  
         this.SetScreenArea();
  
        _isRecording = true;
  
         string fullName = string.Format(@"{0}\{1}_{2}.mp4", path, "Record_", DateTime.Now.ToString("d_MMM_yyyy_HH_mm_ssff"));
  
  
  
              // Save File option
  
              _Screenwriter.Open(
  
                  fullName,
  
                  this._Screenwidth,
  
                  this._Screenheight,
  
                  10, VideoCodec.MPEG4, 1000000);
  
              // create screen capture video source
  
              this._streamVideo = new ScreenCaptureStream(this._screenArea);
  
  
  
              // set NewFrame event handler
  
              this._streamVideo.NewFrame += new NewFrameEventHandler(this.video_NewScreenFrame);
  
  
  
              // start the video source
  
              this._streamVideo.Start();
  
  
  
      }
  
      private void video_NewScreenFrame(object sender, NewFrameEventArgs eventArgs)
  
      {
  
          if (this._isScreenRecording)
  
          {              
  
              this._Screenwriter.WriteVideoFrame(eventArgs.Frame);             
  
          }
  
          else
  
          {             
  
              _streamVideo.SignalToStop();             
  
              _Screenwriter.Close();
  
          }
  
      }
  
  
  
      private void SetScreenArea()
  
      {
  
          // get entire desktop area size
  
          foreach (Screen screen in Screen.AllScreens)
  
          {
  
              this._screenArea = Rectangle.Union(_screenArea, screen.Bounds);
  
          }
  
      }

• swscale/output : Add rgba64/rgb48/bgra64/bgr48 output functions with full chroma inter...

  17 juin 2015, par Michael Niedermayer

  swscale/output : Add rgba64/rgb48/bgra64/bgr48 output functions with full chroma interpolation
  Signed-off-by : Michael Niedermayer <michaelni@gmx.at>
  

  • [DH] libswscale/output.c
  • [DH] libswscale/utils.c
  • [DH] tests/ref/fate/filter-pixfmts-scale