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• How to execute a cmd command using java program [duplicate]

  21 mars 2013, par Yaswanth Veeramachaneni

  This question already has an answer here :

  • How to run Unix shell script from java code ?
    

    9 answers

  I want to execute a cmd command using java program

  ffmpeg -i input.mp4 output.mp3

  I want the above command to be executed in cmd using java language.
  and in above code I have directly given the input file name to execute but can I write a code so that user can manually give an input file ?

• Intermitent Connection Issues for FFMPEG Stream capture

  22 novembre 2014, par Quentin Spottiswoode

  I intend to create a Python shell script to open a connection to an MP3 stream and record the stream over a specified period and save the file to a .mp3 file for distribution. ffmpeg will likely be involved through a shell command, rather than using any kind of python wrapper class.

  Occasionally, the source of the stream may encounter connection issues with the internet, resulting in the listening client (ffmpeg) losing it’s connection with the host. Currently ffmpeg discards the recording entirely and forgets about attempting to reconnect to the host.

  having had a look through ffmpeg’s extensive documentation, I found myself very confused...

  • Is there some method to retain the recording up to the point of the connection failure ?
  • Is there a method of automatically re-connecting to the stream when the host reappears, or do I have to catch the error and try a certain number of times ?
  • Is there a method of passing the error to the python script in order to create a suitable response ?

  Many thanks for your insight :)

• How to catch the ffmpeg connection error on python

  6 janvier 2017, par user824624

  I am working on the ffmpeg with python.This works when the remote server is working well, however when the remote server is down, I could see the message on the shell saying
  ’Connection to tcp ://xxxxxxx failed : Connection refused, blabla’

  pro = sp.Popen(command, preexec_fn=os.setsid, shell=False, stderr=sp.PIPE, stdout=sp.PIPE)

  catch exception approach 1 :

  try:
  
     out = self.pro.stderr.readline()
  
     while out:
  
              print '......'
  
  except BrokenPipeError:
  
       print 'err'

  catch exception approach 2 :

  for line in self.pro.stderr:
  
      try:
  
          print line
  
      except BrokenPipeError:
  
          print 'error'

  However none of these works.