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• MVC RTSP forwarding request

  27 octobre 2015, par Benny Chen

  I’d like to restream my rtsp ip camera to be accessible from outside by make request to my web server. I have play around using ffserver and ffmpeg. But it always gave me about 10 seconds of latency on whatever setting. I have tried -fflags nobuffer, playing the value of probesize and analyzeduration, add zerolatency, etc. So I gave up using ffserver to be used as restreaming server.

  If there is no restreaming, just using the ffmpeg to output to a file or view, it gaves low latency below 1 sec.

  Now I am thinking to let the client to have indirect access to the camera to eliminate using restreaming server. My question is, how to forward a rtsp request coming to my server to my ip camera. My web server has 2 network interface. One for internal, which the ip camera connected, and the other for public access. I’d like to keep my ip camera keep private in internal network/not exposed to the internet. So I would like to forward incoming rtsp request to my ip camera.

  I work in MVC and IIS 7.5

• Google Speech API "Sample rate in request does not match FLAC header"

  13 février 2017, par kjdion84

  I’m trying to convert an mp4 video clip into a FLAC audio file and then have google speech spit out the words from the video so that I can detect if specific words were said.

  I have everything working except that I am getting an error from the Speech API :

  {
  
    "error": {
  
      "code": 400,
  
      "message": "Sample rate in request does not match FLAC header.",
  
      "status": "INVALID_ARGUMENT"
  
    }
  
  }

  I am using FFMPEG in order to convert the mp4 into a FLAC file. I am specifying that the FLAC file be 16 bits in the command, but when I right click on the FLAC file Windows is telling me it is 302kbps.

  Here is my PHP code :

  // convert mp4 video to 16 bit flac audio file
  
  $cmd = 'C:/wamp/www/ffmpeg/bin/ffmpeg.exe -i C:/wamp/www/test.mp4 -c:a flac -sample_fmt s16 C:/wamp/www/test.flac';
  
  exec($cmd, $output);
  
  
  
  // convert flac to text so we can detect if certain words were said
  
  $data = array(
  
      "config" => array(
  
          "encoding" => "FLAC",
  
          "sampleRate" => 16000,
  
          "languageCode" => "en-US"
  
      ),
  
      "audio" => array(
  
          "content" => base64_encode(file_get_contents("test.flac")),
  
      )
  
  );
  
  
  
  $json_data = json_encode($data);
  
  
  
  $ch = curl_init();
  
  curl_setopt($ch, CURLOPT_URL, 'https://speech.googleapis.com/v1beta1/speech:syncrecognize?key=MY_API_KEY');
  
  curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));
  
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  
  curl_setopt($ch, CURLOPT_POST, true);
  
  curl_setopt($ch, CURLOPT_POSTFIELDS, $json_data);
  
  curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
  
  
  
  $result = curl_exec($ch);

• Révision 111914 : Ticket #4052 : le nombre de messages publiés dans la boite d’infos d’un auteur d...

  8 octobre 2018, par tcharlss@bravecassine.com