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• 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);

• ffprobe/ffmpeg exec doesn't return result on local machine, but works on production system

  27 juillet 2015, par Kinesias

  I want to get the duration of a movie, using ffprobe (part of ffmpeg).
  The command line I’m using is this :

  ffprobe -v error -show_entries format=duration -of
  
  default=noprint_wrappers=1:nokey=1
  
  path/to/video.mov

  It works perfectly in the shell, gives me a result of 4.5554 (seconds).

  However, if I call this command via exec on my local machine, I get an empty result.

  var_dump( exec("ffprobe -v .......") );
  
  returns string(0) ""

  Now comes the burner : It works perfectly on the production machine, though !!

  These are my configurations :

  Local machine:        Mac OS 10.9.5,      PHP 5.6.11   ffmpeg 2.7.1
  
  Production machine:   Mac OS Server 10.6  PHP 5.3.1    ffmpeg 2.7.2

  Is this kind of a bug in PHP 5.6 or something ???
  Thanks, Matt

• Windows python can't pass system variables [duplicate]

  14 mai 2016, par Soner B

  This question already has an answer here :

  • python subprocess Popen environment PATH ?
    
    4 answers
    

  I can cut video ffmpeg command prompt like this :

  ffmpeg -ss 00:41:12.200 -i "the_video.mp4" -t 00:00:03.100 -c:v
  libx264 -preset slow -profile:v high -crf 21 "the_video_cut.mp4" -y

  ffmpeg.exe is in C :\Windows\System32

  But I try with python.

  import subprocess as sp
  
  
  
  CRF_VALUE = '21'
  
  PROFILE = 'high'
  
  PRESET = 'slow'
  
  cmd = ['ffmpeg', '-ss', '%s'%start_time, '-i', '"%s"'%inputFile, '-t', '%s'%diffTime, '-c:v', 'libx264', '-preset', PRESET, '-profile:v', PROFILE, '-crf', CRF_VALUE, '"%s_cut.%s"'%('_'.join(file_strip[:-1]),file_strip[-1]), '-y']
  
  
  
  sp.call(' '.join(cmd))

  Error message :

  Traceback (most recent call last):
  
    File "test.py", line 81, in <module>
  
      main(sys.argv[1:])
  
    File "test.py", line 76, in main
  
      isle(inputFile, start_time, diffTime)
  
    File "test.py", line 48, in isle
  
      sp.call(' '.join(cmd))
  
    File "C:\Program Files (x86)\Python35-32\lib\subprocess.py", line 560, in call
  
      with Popen(*popenargs, **kwargs) as p:
  
    File "C:\Program Files (x86)\Python35-32\lib\subprocess.py", line 950, in __init__
  
      restore_signals, start_new_session)
  
    File "C:\Program Files (x86)\Python35-32\lib\subprocess.py", line 1220, in _execute_child
  
      startupinfo)
  
  FileNotFoundError: [WinError 2] Sistem belirtilen dosyayı bulamıyor
  
  </module>

  with try sp.call(' '.join(cmd), shell=True)

  This error message :

  ’ffmpeg’ is not recognized as an internal or external command,
  operable program or batch file.

  If i copy ffmpeg.exe in the same folder test.py, it’s okey, working.