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• pyinstaller and moviepy, ffmpeg works from terminal but not from finder

  24 juin 2017, par Todd

  I am packaging python using pyinstaller 2.1 on OSX Mavericks. I have done this successfully in the past, but this is my first package that uses moviepy and ffmpeg. I use the following import :

  from moviepy.video.io import ffmpeg_reader

  Without this line in the code, everything works fine and I can launch my final package from its icon in finder. With the moviepy import, it will work if I launch from the terminal like this :

  open ./myapp.app

  but it will not open if I click on the icon from finder (opens quickly and crashes). I am assuming this has something to do with paths or environment variables that are set in terminal, but are not transferred to my packaged app. I have tried various hidden imports in pyinstaller for moviepy and its dependencies, but nothing seems to work. —debug mode hasn’t provided much info to track it down. Any other ideas ?

  Thanks !

• Doesn't python's ffmpy works with temporary files made using tempfile.TemporaryFile ?

  8 juin 2017, par tkhurana96

  I am making a function whose purpose is to take a mp3 file and analyse and process it. So, taking help from this SO answer, I am making a temporary wav file, and then using python ffmpy library I am trying to convert mp3(actual given file) to wav file. But the catch is that I am giving the temporary wav file generated above as the output file to ffmpy to store the result to i.e. I am doing this :

  import ffmpy
  
  import tempfile
  
  from scipy.io import wavfile
  
  
  
  # audioFile variable is known here
  
  
  
  tempWavFile = tempfile.TemporaryFile(suffix="wav")
  
  ff_obj = ffmpy.FFmpeg(
  
                        global_options="hide_banner",
  
                        inputs={audioFile:None},
  
                        outputs={tempWavFile: " -acodec pcm_s16le -ac 1 -ar 44000"}
  
                       )
  
  
  
  ff_obj.run()
  
  
  
  [fs, frames] = wavfile.read(tempWavFile)
  
  print(" fs is: ", fs)
  
  print(" frames is: ", frames)

  But on line ff_obj.run() this error occurs :

  File "/home/tushar/.local/lib/python3.5/site-packages/ffmpy.py", line 95, in run
  
      stderr=stderr
  
    File "/usr/lib/python3.5/subprocess.py", line 947, in __init__
  
      restore_signals, start_new_session)
  
    File "/usr/lib/python3.5/subprocess.py", line 1490, in _execute_child
  
      restore_signals, start_new_session, preexec_fn)
  
  TypeError: Can't convert '_io.TextIOWrapper' object to str implicitly

  So, my question is :

  • When I replaced tempWavFile = tempfile.TemporaryFile(suffix="wav") with tempWavFile = tempfile.mktemp('.wav'), no error occurs, why so ?
  • What does this error mean and what is the cause of it’s occurrence and how can it be corrected ?

• Doesn't python's ffmpy works with temporary files ?

  8 juin 2017, par tkhurana96

  I am making a function whose purpose is to take a mp3 file and analyse and process it. So, taking help from this SO answer, I am making a temporary wav file, and then using python ffmpy library I am trying to convert mp3(actual given file) to wav file. But the catch is that I am giving the temporary wav file generated above as the output file to ffmpy to store the result to i.e. I am doing this :

  import ffmpy
  
  import tempfile
  
  from scipy.io import wavfile
  
  
  
  # audioFile variable is known here
  
  
  
  tempWavFile = tempfile.TemporaryFile(suffix="wav")
  
  ff_obj = ffmpy.FFmpeg(
  
                        global_options="hide_banner",
  
                        inputs={audioFile:None},
  
                        outputs={tempWavFile: " -acodec pcm_s16le -ac 1 -ar 44000"}
  
                       )
  
  
  
  ff_obj.run()
  
  
  
  [fs, frames] = wavfile.read(tempWavFile)
  
  print(" fs is: ", fs)
  
  print(" frames is: ", frames)

  But on line ff_obj.run() this error occurs :

  File "/home/tushar/.local/lib/python3.5/site-packages/ffmpy.py", line 95, in run
  
      stderr=stderr
  
    File "/usr/lib/python3.5/subprocess.py", line 947, in __init__
  
      restore_signals, start_new_session)
  
    File "/usr/lib/python3.5/subprocess.py", line 1490, in _execute_child
  
      restore_signals, start_new_session, preexec_fn)
  
  TypeError: Can't convert '_io.TextIOWrapper' object to str implicitly

  So, my question is :

  • Doesn’t ffmpy work with temporary files, and if it doesn’t then what is the workaround(except the one mentioned in the linked question, as it increases a dependency) ?
  • What does this error mean and what is the cause of it’s occurrence and how can it be corrected ?