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• How do I read ffmpeg log with c# ?

  24 septembre 2018, par mr_blond

  I want to make "./ffmpeg -i vid.mkv" command, to get info and then I need to read it in c#.

  Thereby I run ffmpeg as Process :

  var proc = new Process
  
  {
  
      StartInfo = new ProcessStartInfo
  
      {
  
          FileName = "ffmpeg",
  
          Arguments = "-i vid.mkv",
  
          UseShellExecute = false,
  
          RedirectStandardOutput = true,
  
          CreateNoWindow = true
  
      }
  
  };

  Then I try to read id :

  proc.Start();
  
  while (!proc.StandardOutput.EndOfStream)
  
  {
  
      string line = proc.StandardOutput.ReadLine();
  
  }

  At the step

  proc.Start()

  new console window opens and ffmpeg writes log to it. And at the step

  while()

  proc.StandardOutput.EndOfStream becomes true.

  How do I read this log ?

• PHP FFMpeg error ffprobe failed to execute command "ffprobe.exe" "-help" "-loglevel" "quiet"

  5 mars 2017, par Michele

  I’m searching for a way to compress and convert uploaded videos on my site, I’m trying to use FFMpeg with this PHP basic code (on windows) :

  <?php
  
  ini_set('display_errors', 'On'); error_reporting(E_ALL);
  
  require("vendor/autoload.php");
  
  $ffmpeg = FFMpeg\FFMpeg::create(array(
  
      'ffmpeg.binaries'  => 'C:/inetpub/wwwroot/FFmpeg/ffmpeg.exe',
  
      'ffprobe.binaries' => 'C:/inetpub/wwwroot/FFmpeg/ffprobe.exe',
  
      'timeout'          => 3600, // The timeout for the underlying process
  
      'ffmpeg.threads'   => 12,   // The number of threads that FFMpeg should use
  
  ));
  
  $video = $ffmpeg->open('input.mp4');
  
  $video
  
      ->filters()
  
      ->resize(new FFMpeg\Coordinate\Dimension(320, 240))
  
      ->synchronize();
  
  $video
  
      ->frame(FFMpeg\Coordinate\TimeCode::fromSeconds(10))
  
      ->save('frame.jpg');
  
  $video
  
      ->save(new FFMpeg\Format\Video\X264(), 'export-x264.mp4')
  
      ->save(new FFMpeg\Format\Video\WMV(), 'export-wmv.wmv')
  
      ->save(new FFMpeg\Format\Video\WebM(), 'export-webm.webm');
  
  ?>

  but I’m getting this error :

  Fatal error: Uncaught Alchemy\BinaryDriver\Exception\ExecutionFailureException: ffprobe failed to execute command "C:/inetpub/wwwroot/FFmpeg/ffprobe.exe" "-help" "-loglevel" "quiet" in C:\inetpub\wwwroot\site\vendor\alchemy\binary-driver\src\Alchemy\BinaryDriver\ProcessRunner.php:100 Stack trace: #0 C:\inetpub\wwwroot\site\vendor\alchemy\binary-driver\src\Alchemy\BinaryDriver\ProcessRunner.php(72): Alchemy\BinaryDriver\ProcessRunner->doExecutionFailure('"C:/inetpub/www...') #1 C:\inetpub\wwwroot\site\vendor\alchemy\binary-driver\src\Alchemy\BinaryDriver\AbstractBinary.php(209): Alchemy\BinaryDriver\ProcessRunner->run(Object(Symfony\Component\Process\Process), Object(SplObjectStorage), false) #2 C:\inetpub\wwwroot\site\vendor\alchemy\binary-driver\src\Alchemy\BinaryDriver\AbstractBinary.php(137): Alchemy\BinaryDriver\AbstractBinary->run(Object(Symfony\Component\Process\Process), false, NULL) #3 C:\inetpub\wwwroot\site\vendor\php-ffmpeg\php-ffmpeg\src\FFMpeg\FFProbe\OptionsTester.php(61): Alchemy\Binary in C:\inetpub\wwwroot\site\vendor\php-ffmpeg\php-ffmpeg\src\FFMpeg\FFProbe\OptionsTester.php on line 63

  what am I doing wrong ? there are better libraries ?

• ffmpeg using MediaCodec, avcodec_open2 says error code :-1 (0xffffffff) text : "Operation not permitted"

  11 mai 2017, par Miguel Del Amor

  I’m trying to use the Android API MediaCoded that have been supported by ffmpeg but while I try to open the codec I got "Operation not permitted" all times, I’ve tried some changes and I’ve tried to find examples without not luck.

  This is what I’m doing

  av_jni_set_java_vm(QAndroidJniEnvironment::javaVM(), NULL);
  
  
  
  av_register_all();
  
  avcodec_register_all();
  
  
  
  AVCodec *_codec(nullptr);
  
  AVCodecContext *_codecContext(nullptr);
  
  
  
  if (_codec == nullptr)
  
      _codec = avcodec_find_decoder_by_name("h264_mediacodec");
  
  
  
  if (_codecContext == nullptr)
  
      _codecContext = avcodec_alloc_context3(_codec);
  
  
  
  int ret = 0;
  
  if( (ret = avcodec_open2(_codecContext, _codec, NULL)) < 0 ) {
  
  
  
      char str[AV_ERROR_MAX_STRING_SIZE];
  
      memset(str, 0, sizeof(str));
  
      av_strerror(ret, str, sizeof(str));
  
  
  
      qDebug("avcodec_open2 \"%s\" error[code:%d text:\"%s\"]",_codec->long_name, ret, str);
  
  }

  And I’m getting this output

  avcodec_open2 "H.264 Android MediaCodec decoder" error[code:-1 text:"Operation not permitted"]

  What I’m doing wrong ?