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• Using AFORGE to record the videos in c#

  11 octobre 2015, par Muhammad Nauman

  i’ve try the following way to record the video from the Webcam by 25 Frame-rate per sec for 10sec but when i get the out put video it is of 2sec and the frames are played to fast as compare to the video stream.

  The code is as follows.

      using System;
  
  using System.Drawing;
  
  using System.Windows.Forms;
  
  using AForge.Video;
  
  using AForge.Video.DirectShow;
  
  using System.Threading;
  
  using AForge.Video.FFMPEG;
  
  
  
  namespace AforgeTutorial
  
  {
  
      public partial class Form1 : Form
  
      {
  
          private FilterInfoCollection ListOfCams;
  
          private VideoCaptureDevice SelectedCam; //From where we will take image
  
          System.Timers.Timer tim;
  
  
  
          Thread t;
  
          bool isNewFrame = false;
  
          VideoFileWriter writer;
  
  
  
          public Form1()
  
          {
  
              InitializeComponent();
  
              tim = new System.Timers.Timer(10000);
  
              tim.Elapsed += new System.Timers.ElapsedEventHandler(tim_Elapsed);
  
              t = new Thread(saveVideo);
  
          }
  
  
  
          void tim_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
  
          {
  
              if (isRecord)
  
              {
  
                  writer.Close();
  
                  isRecord = false;
  
              }
  
          }
  
  
  
          private void Form1_Load(object sender, EventArgs e)
  
          {
  
              ListOfCams = new FilterInfoCollection(FilterCategory.VideoInputDevice);
  
  
  
              if (ListOfCams.Count == 0)
  
                  return;
  
  
  
              comboBox1.Items.Clear();
  
              foreach (FilterInfo Cam in ListOfCams)
  
              {
  
                  comboBox1.Items.Add(Cam.Name);
  
              }
  
          }
  
  
  
          private void StopCamera()
  
          {
  
              SelectedCam.SignalToStop();
  
              SelectedCam.Stop();
  
          }
  
  
  
          bool isRecord = false;
  
  
  
          private void Start_Click(object sender, EventArgs e)
  
          {
  
              if (comboBox1.Text == string.Empty)
  
                  return;
  
  
  
              SelectedCam = new VideoCaptureDevice(ListOfCams[comboBox1.SelectedIndex].MonikerString);
  
  
  
              SelectedCam.NewFrame += new NewFrameEventHandler(SelectedCam_NewFrame);
  
              SelectedCam.Start();
  
          }
  
  
  
          Bitmap image;
  
          void SelectedCam_NewFrame(object sender, NewFrameEventArgs eventArgs)
  
          {
  
              image = (Bitmap)eventArgs.Frame.Clone();
  
              isNewFrame = true;
  
              pictureBox1.Image = (Bitmap)eventArgs.Frame.Clone();            
  
          }
  
  
  
          private void Form1_FormClosing(object sender, FormClosingEventArgs e)
  
          {
  
              StopCamera();
  
          }
  
  
  
          private void Stop_Click(object sender, EventArgs e)
  
          {
  
              StopCamera();
  
          }
  
  
  
          private void btnRecord_Click(object sender, EventArgs e)
  
          {
  
              tim.Start();
  
  
  
              if (!isRecord)
  
              {
  
                  writer = new VideoFileWriter();
  
                  writer.Open(@"C:/code-bude_test_video.mp4", 640, 480, 25, VideoCodec.MPEG4,10000);
  
              }
  
  
  
              isRecord = !isRecord;
  
              if (isRecord)
  
                  t.Start();
  
          }
  
  
  
          void saveVideo()
  
          {
  
              while (isRecord)
  
              {
  
                  if (isNewFrame)
  
                  {
  
                      writer.WriteVideoFrame(image);
  
                      isNewFrame = false;
  
                  }
  
              }
  
          }
  
      }
  
  }

• FFmpeg works on command line but not working on PHP script [on hold]

  6 août 2014, par burakcakirel

  Here is the screenshot to compare the results of command line output and PHP script output.

  http://screencast.com/t/e8Cdmr6aQ

  

  It works when ffmpeg command runs on command line, but it doesn’t work when using exec() command in php script. Any solution ?

  Also, the following screenshot shows that all about ffmpeg on the server :

  http://screencast.com/t/N9TnOORJkx

  

  I’ve tried /opt/mct/bin/ffmpeg and /usr/local/bin/ffmpeg. Nothing works on php script.

  safe_mode => OFF
  
  
  
  FFmpeg paths => 755

  EDIT : FFmpeg command already exists in the screenshot. Anyway here are the commands which none of them don’t work :

  /root/bin/ffmpeg -y -i Intro1.mp4 -strict -2 -s 640x480 Intro1_mp4.mp4 2>&1
  
  
  
  /opt/mct/bin/ffmpeg -y -i Intro1.mp4 -strict -2 -s 640x480 Intro1_mp4.mp4 2>&1
  
  
  
  /usr/local/bin/ffmpeg -y -i Intro1.mp4 -strict -2 -s 640x480 Intro1_mp4.mp4 2>&1

• Revision 899585ebe9 : Fix reference frame size restrictions. The issue was introduced by commit g9f37

  28 juillet 2014, par Jim Bankoski

  Changed Paths :
   Modify /test/test-data.sha1

  
   Modify /test/test.mk

  
   Modify /test/test_vectors.cc

  
   Modify /vp9/decoder/vp9_decodeframe.c

  
  
  Fix reference frame size restrictions.

  The issue was introduced by commit g9f37d14 with adding explicit
  restrictions on reference-frame scale factors. The restriction
  is checked against aligned-by-8 frame dimensions, not against
  original ones. So, for example, frame of 35×35 actually can refer
  to frame of 70×70, but the new check won’t allow this. It will
  compare 35 vs 72 (not 70), so 2x downscale limit will be exceeded.

  Change-Id : Ic663693034440f64ac8312cbff9e1e773a921060