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• 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);
  
          }
  
      }

• How to record sound/audio via FFmpeg, Alsa, PulseAudio or Sox without a soundcard (using the commandline)

  13 avril 2019, par Heart Of A Lion

  I’m trying to record audio on an Ubuntu server that has no soundcard or any other audio device. When I use the following Alsa command to list any audio devices, then it can’t find any devices.

  arecord -l

  I’ve tried recording/capturing audio using the following packages, but because there is no soundcard they all fail to record any audio :

  ffmpeg, alsa, pulseaudio, sox

  Now it should be possible to record sound on a server that has no soundcard, as some people have managed to do it. The question is how.

  Can someone give a step by step commandline walk-through of how to do this on an Ubuntu server, so that audio can be recorded on the server using any of the above-mentioned packages ?

• FFMPEG PHP enter command lines ?

  3 mai 2019, par Robert

  You will have to excuse me I have been spending the past 2 days reading through old FFMPEG posts for an answer but did little but confuse myself.
  It seems from what I read FFMPEG-PHP wrappers aren’t supported anymore ??? and to be honest they don’t seem like the proper way of learning how to incorporate it with PHP as there is a whole lot more help for command line FFMPEG usage and the FFMPEG-PHP wrapper usage looks nothing like the command line as far as I can tell.

  So I have 2 questions on using ffmpeg with PHP. So we are on the same page I posted a little info below.

  I downloaded FFMPEG static for windows 64bit.
  I then ran (in composer)

        $ composer require php-ffmpeg/php-ffmpeg

  in my vendor folder i have the following path.

      vendor\ffmpeg-20190429-ac551c5-win64-static\bin

  if I open the command prompt in that folder and type FFMPEG I get.

   ffmpeg version N-93710-gac551c54b1 Copyright (c) 2000-2019 the FFmpeg 
  
   developers
  
  built with gcc 8.3.1 (GCC) 20190414
  
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable- 
  
   fontconfig --enable-gnutls --enable-iconv --enable-libass --enable- 
  
   libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame -- 
  
   enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg 
  
   --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr -- 
  
   enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack 
  
   --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 -- 
  
   enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable- 
  
   libvidstab --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa 
  
   --enable-libspeex --enable-libxvid --enable-libaom --enable-libmfx -- 
  
   enable-amf --enable-ffnvcodec --enable-cuvid --enable-d3d11va --enable- 
  
   nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt
  
   libavutil      56. 26.100 / 56. 26.100
  
   libavcodec     58. 52.100 / 58. 52.100
  
   libavformat    58. 27.103 / 58. 27.103
  
   libavdevice    58.  7.100 / 58.  7.100
  
   libavfilter     7. 50.100 /  7. 50.100
  
   libswscale      5.  4.100 /  5.  4.100
  
   libswresample   3.  4.100 /  3.  4.100
  
   libpostproc    55.  4.100 / 55.  4.100
  
   Hyper fast Audio and Video encoder
  
   usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

  So I’m pretty sure FFMPEG is installed which was my goal.

  Now on my PHP side here is where I am at, and I’m not sure how this works.

  1ST QUESTION. Do I need to save my $_POST files to the drive before manipulating them ? Or can I use the $file and $filep as is ? I don’t really want to store those files, only the output.

  My SLIM code.

   $app->post('/telestrator', function(Request $request, Response $response) 
  
   {
  
  
  
   $response = array();
  
  
  
   if (isset ($_POST['ID']) && ($_POST['position']) && $_FILES['video'] 
  
   ['error'] === UPLOAD_ERR_OK && $_FILES['image']['error'] === 
  
   UPLOAD_ERR_OK) {
  
  
  
   $file = $_FILES['video']['tmp_name'];
  
   $filep = $_FILES['image']['tmp_name'];
  
   $time = $_POST['position'];
  
   $position = msToTime($time);
  
   $filetime = round(microtime(true) * 1000);
  
   $outputfolder = 'teletemp/';
  
  
  
   $ID = $_POST['ID'];
  
  
  
   $tempvid = $ID . 'tempvid' . 'mp4';
  
   $finalvid = $ID  . $filetime . 'mp4';
  
  
  
  
  
   $ffmpegpath = "public/ffmpeg.exe";
  
  
  
  echo "Starting ffmpeg...\n\n";
  
  echo shell_exec("$ffmpegpath -loop 1 -i $filep -c:v libx264 -t 3 -pix_fmt 
  
  yuv420p \"$outputfolder.\" $tempvid /");
  
   echo shell_exec("$ffmpegpath -i $file -t $position -c copy 
  
  \"$outputfolder\" 
  
   small-1.mp4 -ss $position -codec copy \"$outputfolder\" small-2.mp4 ");
  
   echo shell_exec("$ffmpegpath -i small-1.mp4 -i $tempvid.mp4 -i small- 
  
  2.mp4 \ 
  
   -filter_complex \"[0:v:0][1:v:0][2:v:0]concat=n=3:v=1:a=1[outv]\" \ 
  
   -map \"[outv]\" $finalvid" );
  
   echo "Done.\n";
  
  
  
   $upload = new videouploads();
  
  
  
          $desc = 'telestrated video for ' . $ID . $filetime;
  
          $ID = $_POST['ID'];  
  
  
  
          if ($upload->saveVideoFile($finalvid, getFileExtension($finalvid), 
  
   $desc, $ID)) {
  
              $response['error'] = false;
  
              $response['message'] = 'File Uploaded Successfullly';
  
          }
  
       else {
  
          $response['error'] = true;
  
          $response['message'] = 'Required parameters are not available';
  
      }
  
      echo json_encode($response);
  
    } 
  
   });
  
  
  
   function getFileExtension($file)
  
   {
  
   $path_parts = pathinfo($file);
  
   return $path_parts['extension'];
  
   }
  
  
  
   function msToTime($duration) {
  
   $seconds = floor($duration / 1000);
  
   $minutes = floor($seconds / 60);
  
   $hours = floor($minutes / 60);
  
   $milliseconds = $duration % 1000;
  
   $seconds = $seconds % 60;
  
   $minutes = $minutes % 60;
  
  
  
   $format = '%02u:%02u:%02u.%03u';
  
   $time = sprintf($format, $hours, $minutes, $seconds, $milliseconds);
  
   return rtrim($time, '0');
  
  
  
   }

  so it’s not running here is my postman. How do I get it to actually run the FFMPEG.

   Starting ffmpeg...
  
  
  
   Done.
  
  
  
   <br />
  
   <b>Notice</b>:  Undefined index: extension in
  
   <b>C:\xampp\htdocs\Pathways\public\index.php</b> on line
  
   <b>14741</b>
  
   <br />
  
   {"error":false,"message":"File Uploaded Successfullly"}