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• better way to record desktop via ffmpeg

  29 mars 2014, par Maged E William

  in my form there's a timer that capture the screen as jpeg every 85 ms, it captures until the user shutdown the windows or electricity cut off so the last frame(image) may get corrupt which is okay for me, now when the user log in the form run on the start up now on the on load event it ask if there images in temp folder if yes it open ffmpeg to convert all images into one video but that seems to take a lot of time i have +300000 image and that because it capture the screen for at least a 10 hour every day but that will take a lot of time to convert them, i wonder if there any other way to directly record at a video and when electricity cut off that video file stay good with no corruption and with that i mean :
  i can't scroll or navigate
  

  here is my ffmpeg command : -f image2 -framerate 10 -i C:\\Temp\\%06d.jpeg -c:v libx264 -r 10 -crf 37 -pix_fmt yuv420p C:Video\\" + s + ".mp4

• How to Save and Display a Video Simultaneously using C# Aforge.NET framework ?

  8 avril 2014, par Akshay

  I am able to display the video from my webcam or any other integrated device into a picturebox . Also i am able to Save the video into an avi file using FFMPEG DLL files.
  I want to do both things simultaneously ie Save the video in the avi file as well as at the same time display the live feed too.
  This is for a surveillance project where i want to monitor the live feed and save those too.

  using System;
  
  using System.Collections.Generic;
  
  using System.ComponentModel;
  
  using System.Data;
  
  using System.Drawing;
  
  using System.Text;
  
  using System.Windows.Forms;
  
  
  
  using AForge.Video;
  
  using AForge.Video.DirectShow;
  
  using AForge.Video.FFMPEG;
  
  using AForge.Video.VFW;
  
  using System.Drawing.Imaging;
  
  using System.IO;
  
  
  
  namespace cam_aforge1
  
  {
  
  public partial class Form1 : Form
  
  {
  
      private bool DeviceExist = false;
  
      private FilterInfoCollection videoDevices;
  
      private VideoCaptureDevice videoSource = null;
  
  
  
      public Form1()
  
      {
  
          InitializeComponent();
  
      }
  
  
  
      private void getCamList()
  
      {
  
          try
  
          {
  
              videoDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
  
              comboBox1.Items.Clear();
  
              if (videoDevices.Count == 0)
  
                  throw new ApplicationException();
  
  
  
              DeviceExist = true;
  
              foreach (FilterInfo device in videoDevices)
  
              {
  
                  comboBox1.Items.Add(device.Name);
  
              }
  
              comboBox1.SelectedIndex = 0; //make dafault to first cam
  
          }
  
          catch (ApplicationException)
  
          {
  
              DeviceExist = false;
  
              comboBox1.Items.Add("No capture device on your system");
  
          }
  
      }
  
  
  
      private void rfsh_Click(object sender, EventArgs e)
  
      {
  
          getCamList();
  
      }
  
  
  
      private void start_Click(object sender, EventArgs e)
  
      {
  
          if (start.Text == "&Start")
  
          {
  
              if (DeviceExist)
  
              {
  
                  videoSource = new VideoCaptureDevice(videoDevices[comboBox1.SelectedIndex].MonikerString);
  
                  videoSource.NewFrame += new NewFrameEventHandler(video_NewFrame);
  
                  videoSource.NewFrame += new NewFrameEventHandler(video_NewFrameSave);
  
                  CloseVideoSource();
  
                  videoSource.DesiredFrameSize = new Size(160, 120);
  
                  //videoSource.DesiredFrameRate = 10;
  
                  videoSource.Start();
  
                  label2.Text = "Device running...";
  
                  start.Text = "&Stop";
  
                  timer1.Enabled = true;
  
              }
  
              else
  
              {
  
                  label2.Text = "Error: No Device selected.";
  
              }
  
          }
  
          else
  
          {
  
              if (videoSource.IsRunning)
  
              {
  
                  timer1.Enabled = false;
  
                  CloseVideoSource();
  
                  label2.Text = "Device stopped.";
  
                  start.Text = "&Start";                    
  
              }
  
          }
  
      }
  
      private void video_NewFrame(object sender, NewFrameEventArgs eventArgs)
  
      {
  
          Bitmap img = (Bitmap)eventArgs.Frame.Clone();
  
          pictureBox1.Image = img;
  
      }
  
  
  
      Bitmap imgsave;
  
      private void video_NewFrameSave(object sender, NewFrameEventArgs eventArgs)
  
      {
  
          imgsave = (Bitmap)eventArgs.Frame.Clone();
  
      }
  
  
  
      private void CloseVideoSource()
  
      {
  
          if (!(videoSource == null))
  
              if (videoSource.IsRunning)
  
              {
  
                  videoSource.SignalToStop();
  
                  videoSource = null;
  
              }
  
      }
  
  
  
      private void timer1_Tick(object sender, EventArgs e)
  
      {
  
          label2.Text = "Device running... " + videoSource.FramesReceived.ToString() + " FPS";
  
      }
  
  
  
      private void Form1_FormClosed(object sender, FormClosedEventArgs e)
  
      {
  
          CloseVideoSource();
  
      }
  
  
  
      private void Form1_Load(object sender, EventArgs e)
  
      {
  
  
  
      }
  
  
  
      VideoFileWriter writer;
  
  
  
      private void button1_Click(object sender, EventArgs e)
  
      {
  
          int width = 640;
  
          int height = 480;
  
          writer = new VideoFileWriter();
  
          writer.Open("test.avi", width, height, 75, VideoCodec.MPEG4);
  
          for (int i = 0; i < 5000; i++)
  
          {
  
              writer.WriteVideoFrame(imgsave);
  
          }
  
  
  
      }
  
  
  
      private void button2_Click(object sender, EventArgs e)
  
      {
  
          writer.Close();
  
      }
  
  
  
  }
  
  }

  Thanks in advance.

• Add support for contentEditable tags

  28 octobre 2015, par dorner

  Add support for contentEditable tags
  Currently the validation library only works on classic form elements. However, there is no reason it can’t work on rich text elements that have names and use contentEditable. This change adds support for these tags.