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• Use Windows ffmpeg to record audio output without using the StereoMix

  5 janvier 2019, par DevtelSoftware

  I am looking for a way to record the audio output (speakers) using Windows ffmpeg.
  I need to do this WITHOUT installing any extra dshow filters and without having the StereoMix input enabled (since this is not available on many computers).

  I have read in the ffmpeg documentation that the -map would allow redirecting an audio output so that ffmpeg sees it as an audio input but I can’t find any example of how to do that.

  In Linux I managed to do it like this :

  ffmpeg -f pulse -ac 2 -ar 44100 -i alsa_output.pci-0000_00_1f.4.analog-stereo.monitor -f pulse -ac 2 -ar 44100 -i alsa_input.pci-0000_00_1f.4.analog-stereo -filter_complex amix=inputs=2 test.mp4

  However I can’t find a similar way to do it in Windows and MacOSX.

  So in short, is it possible with the Windows ffmpeg to record audio from the speakers without extra dshow filters (out-of-the-box) ? Same question goes for MacOSX.

  Thanks !

• Cannot find the class in php oop [duplicate]

  30 décembre 2018, par mr stark

  This question already has an answer here :

  • PHP class not found when using namespace
    
    2 answers
    

  I’m trying to make a class for video streaming with FFMpeg Php package.

  I’m getting this error on browser :

  Fatal error : Uncaught Error : Class ’Classes\Video’ not found in C :\xampp\htdocs\php\index.php:5 Stack trace : #0 main thrown in C :\xampp\htdocs\php\index.php on line 5

  this is my index.php :

    use Classes\Video;
  
  
  
    $video = new Video();
  
  
  
    $video->videoStreaming("video.mp4",320,240,"myVideo","WMV");

  and Video in Classes directory :

      namespace Classes;
  
      use FFMpeg\Coordinate\Dimension;
  
      use FFMpeg\FFMpeg;
  
      use FFMpeg\Format\Video\WMV;
  
      require "../vendor/autoload.php";
  
  
  
      class Video
  
      {
  
          private $ffmpeg;
  
          private $video;
  
  
  
  public function __construct()
  
  {
  
      $this->ffmpeg = FFMpeg::create([
  
          'ffmpeg.binaries' => 'C:\ffmpeg\ffmpeg.exe',
  
          'ffprobe.binaries' => 'C:\ffmpeg\ffprobe.exe',
  
          'timeout' => 3600,
  
          'ffmpeg.threads' => 12,
  
      ]);
  
  }
  
  
  
  public function videoStreaming($videoPath,$width,$height,$newName,$newExtension)
  
  {
  
      $this->video = $this->ffmpeg->open($videoPath);
  
      if ($width && $height) {
  
          $this->video->filters()->resize(new Dimension($width,$height))->synchronize();
  
      }
  
      $this->video->save(new WMV(), $newName . $newExtension);
  
  }
  
  
  
      }

• Video Streaming shows not working in Micorsoft Edge

  22 novembre 2018, par Ragesh S

  I am newbi in using Video streaming in ASP.Net MVC project. I have a video library webpplication, most of the videos are .mp4 format. Please see my code below.

  Code

  public HttpResponseMessage Get(string filename)
  
      {
  
          var filePath = new FileStreameHelpers().GetFilePath(filename);
  
          if (!File.Exists(filePath))
  
              return new HttpResponseMessage(HttpStatusCode.NotFound);
  
  
  
          var response = Request.CreateResponse();
  
          response.Headers.AcceptRanges.Add("bytes");
  
  
  
          var streamer = new FileStreameHelpers();
  
          streamer.FileInfo = new FileInfo(filePath);
  
          response.Content = new PushStreamContent(streamer.WriteToStream, new FileStreameHelpers().GetMimeType(Path.GetExtension(filePath)));
  
  
  
          RangeHeaderValue rangeHeader = Request.Headers.Range;
  
          if (rangeHeader != null)
  
          {
  
              long totalLength = streamer.FileInfo.Length;
  
              var range = rangeHeader.Ranges.First();
  
              streamer.Start = range.From ?? 0;
  
              streamer.End = range.To ?? totalLength - 1;
  
  
  
              response.Content.Headers.ContentLength = streamer.End - streamer.Start + 1;
  
              response.Content.Headers.ContentRange = new ContentRangeHeaderValue(streamer.Start, streamer.End,
  
                  totalLength);
  
              response.StatusCode = HttpStatusCode.PartialContent;
  
          }
  
          else
  
          {
  
              response.StatusCode = HttpStatusCode.OK;
  
          }
  
  
  
          return response;
  
      }
  
    public async Task WriteToStream(Stream outputStream, HttpContent content, TransportContext context)
  
      {
  
          try
  
          {
  
              var buffer = new byte[6553600];
  
              using (var video = FileInfo.OpenRead())
  
              {
  
                  if (End == -1)
  
                  {
  
                      End = video.Length;
  
                  }
  
                  var position = Start;
  
                  var bytesLeft = End - Start + 1;
  
                  video.Position = Start;
  
                  while (position <= End)
  
                  {
  
                      var bytesRead = video.Read(buffer, 0, (int)Math.Min(bytesLeft, buffer.Length));
  
                      await outputStream.WriteAsync(buffer, 0, bytesRead);
  
                      position += bytesRead;
  
                      bytesLeft = End - position + 1;
  
                  }
  
              }
  
          }
  
          catch (Exception ex)
  
          {
  
              // fail silently
  
              Utilities.SaveException("FileStreameHelpers - WriteToStream", ex);
  
          }
  
          finally
  
          {
  
              outputStream.Close();
  
          }
  
      }

  it works fine in Firefox and Chrome but it shows error in Microsoft Edge browser like below.

  HTML

  <video width="320" height="240" controls="controls">
  
      <source src="/api/Media/Get?filename=SampleVideo_1280x720_1mb.mp4" type="video/mp4">
  
      Your browser does not support the video tag.
  
  </source></video>

  The remote host closed the connection. The error code is 0x800703E3.

  Please advice.