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• avutil/encryption_info : Fix documentation problem.

  26 juin 2018, par Jacob Trimble

  avutil/encryption_info : Fix documentation problem.
  Signed-off-by : Jacob Trimble <modmaker@google.com>
  
  Signed-off-by : Michael Niedermayer <michael@niedermayer.cc>
  

  • [DH] libavutil/encryption_info.h

• Scheduled ffmpeg function gives thread.error and also fires ffmpeg too many times

  16 février 2016, par user2192778

  I want to record a clip of a radio stream every hour. Below is the code I am using to accomplish this so far.

      def sched(): # schedules a recording every hour
  
          def stream_record ():
  
              timeinfo = datetime.now().strftime('%Y%m%d_%H%M_%S%f')
  
              ffmpegEXE = "C:/path/to/ffmpeg.exe" 
  
              subprocess.call([ffmpegEXE, '-i', url, '-t', '00:07:00', 
  
              output_folder + timeinfo + '_' + str(start_minute) + 'url.mp3'], shell=True)
  
  
  
          i = 0
  
          while True:
  
  
  
          x = datetime.today()
  
          y=x.replace(day=x.day+1, hour=i, minute= start_minute, second=0, microsecond=0) 
  
          i = (i + 1) % 24
  
          delta_t=y-x
  
          secs=delta_t.seconds+1
  
          t = Timer(secs,stream_record)
  
          t.start()
  
  
  
  sched()

  Two things go wrong. (1) It will run, however an error reads :

  line X in (module)

  sched()

  line Y in sched

  t.start()

  line Z in start

  _start_new_thread(self.__bootstrap, ())

  thread.error : can’t start new thread

  And (2) when it runs, ffmpeg will initialize a recording anywhere from 5-15 times, saving many clips when I only want it to save one.

  How do I fix these errors and get ffmpeg to connect and record only one clip every hour ?

  I know this is an issue with the scheduling function ; the ffmpeg command works fine, as does the python script calling it.

• Running "FFMPEG" for several times in winfoms

  13 novembre 2015, par Ahmad

  In a C# Windows application, I try to call "ffmpeg" to multiplex video and audio. It may be called several times. In the first call, everything is fine, but in the next call I have some problems. One problem is that the earlier "ffmpeg" process isn’t closed. So, I tried to kill it if it exists. but now I got an error for a disposed object in the following code :

     public static void FFMPEG3(string exe_path, string avi_path, string mp3_path, string output_file)
  
      {
  
          const int timeout = 2000;
  
          Kill(exe_path);
  
          using (Process process = new Process())
  
          {
  
              process.StartInfo.FileName = exe_path;
  
              process.StartInfo.Arguments = string.Format(@"-i ""{0}"" -i ""{1}"" -acodec copy -vcodec copy ""{2}""",
  
                                             avi_path, mp3_path, output_file);
  
              process.StartInfo.UseShellExecute = false;
  
              process.StartInfo.CreateNoWindow = true;
  
              process.StartInfo.RedirectStandardOutput = true;
  
              process.StartInfo.RedirectStandardError = true;
  
  
  
              StringBuilder output = new StringBuilder();
  
              StringBuilder error = new StringBuilder();
  
  
  
              using (AutoResetEvent outputWaitHandle = new AutoResetEvent(false))
  
              using (AutoResetEvent errorWaitHandle = new AutoResetEvent(false))
  
              {
  
                  process.OutputDataReceived += (sender, e) =>
  
                  {
  
                      if (e.Data == null)
  
                      {
  
                          outputWaitHandle.Set();
  
                      }
  
                      else
  
                      {
  
                          output.AppendLine(e.Data);
  
                      }
  
                  };
  
                  process.ErrorDataReceived += (sender, e) =>
  
                  {
  
                      if (e.Data == null)
  
                      {
  
                          errorWaitHandle.Set();
  
                      }
  
                      else
  
                      {
  
                          error.AppendLine(e.Data);
  
                      }
  
                  };
  
  
  
                  process.Start();
  
  
  
                  process.BeginOutputReadLine();
  
                  process.BeginErrorReadLine();
  
  
  
                  if (process.WaitForExit(timeout) &&
  
                      outputWaitHandle.WaitOne(timeout) &&
  
                      errorWaitHandle.WaitOne(timeout))
  
                  {
  
                      // Process completed. Check process.ExitCode here.
  
                      process.Close();
  
                  }
  
                  else
  
                  {
  
                      // Timed out.
  
                      process.Close();
  
                  }
  
              }
  
          }
  
      }

  I get ObjectDisposedException for ErrorDataRecieved event on errorWaitHandle.Set();

  First, I want to resolve this error, but if you know any better solution to run the "ffmpeg" for several times please suggest me.