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• Traceback error with Python when using ffmpeg to convert a video

  16 mai 2013, par TheMickeyNick

  The simple way my script runs is the user provides a folder location and a filetype and glob.glob() finds the files with the filetype provided and adds them to a list. It then uses a for loop and goes through the list and converts each video. But it doesn't like when I try to run my ffmpeg command. Any help would be awesome. I'm also using Win 7 64 bit with 64 bit ffmpeg and Python 3.3
  Here's the error :

  OS Error
  
  Traceback (most recent call last):
  
    File "C:\Python33\lib\subprocess.py", line 1106, in _execute_child
  
      startupinfo)
  
  FileNotFoundError: [WinError 2] The system cannot find the file specified
  
  
  
  During handling of the above exception, another exception occurred:
  
  
  
  Traceback (most recent call last):
  
    File "C:\Users\user\Workspace\PythonConverter\HTMLandPythonConverter\Converter.py", line 77, in <module>
  
      massConvert(fileNames)
  
    File "C:\Users\user\Workspace\PythonConverter\HTMLandPythonConverter\Converter.py", line 47, in massConvert
  
      convertVideotoNewFormat(&#39;.mp4&#39;, x)
  
    File "C:\Users\user\Workspace\PythonConverter\HTMLandPythonConverter\Converter.py", line 61, in convertVideotoNewFormat
  
      myFile = subprocess.Popen(ffmpegString)#, stdout=subprocess.PIPE, stderr=subprocess.PIPE
  
    File "C:\Python33\lib\subprocess.py", line 820, in __init__
  
      restore_signals, start_new_session)
  
    File "C:\Python33\lib\subprocess.py", line 1112, in _execute_child
  
      raise WindowsError(*e.args)
  
  FileNotFoundError: [WinError 2] The system cannot find the file specified
  
  </module>

  Here is my code :

  import subprocess
  
  from subprocess import call
  
  import glob
  
  
  
  fileNames = []
  
  fileLocation = {}
  
  filetype = {}
  
  def convertString(location):
  
      s = list(location)
  
      for i in range(len(s)):
  
          if s[i] in '\\':
  
              s[i] = '/'
  
  
  
      if s[len(s)-1] != '/':
  
          s.append('/')
  
      location = "".join(s)
  
      return location
  
  
  
  def convertStringBack(stringTo):
  
      s = list(stringTo)
  
      for i in range(len(s)):
  
          if s[i] in '/':
  
              s[i] = '\\'
  
      stringTo = "".join(s)
  
      return stringTo
  
  
  
  def fileTypeTester():
  
      FieldType = '*' + input('What\'s the file type we are converting from?')
  
      typeSplit = list(FieldType)
  
      if typeSplit[1] != '.':
  
          typeSplit.insert(1,'.')
  
      FieldType = "".join(typeSplit)
  
      if FieldType not in ['*.flv','*.kdb']:
  
          print('Not a valid file type')
  
      else:
  
          return FieldType
  
      return None
  
  
  
  def massConvert(listOfFiles):
  
      print('Starting Conversion')
  
      for x in listOfFiles:
  
          #x = convertStringBack(x)
  
          print('Converting ' + x + ' to .mp4')
  
          convertVideotoNewFormat('.mp4', x)
  
      print('Finished File Conversion')
  
  
  
  
  
  def convertVideotoNewFormat(newFormat, fileLoc):
  
      newFilePath = fileLoc[0:len(fileLoc)-4]
  
      ffmpegString = ["ffmpeg64","-i", fileLoc,"-qscale","0","-ar","22050","-vcodec","libx264",newFilePath,newFormat]
  
      try:
  
          subprocess.check_call(newFilePath)
  
      except OSError:
  
          print('OS Error')
  
      except subprocess.CalledProcessError:
  
          print('Subprocess Error')
  
      myFile = subprocess.Popen(ffmpegString)
  
      print(myFile)
  
  
  
  #This will replace old HTML flv object tag with new video tag, but it is yet to be implemented
  
  def replaceHTML():
  
      pass
  
  
  
  fileLocation = input('What is the path of the files you\'d like to convert?')
  
  fileLocation = convertString(fileLocation)
  
  fileType = fileTypeTester()
  
  fileNames = glob.glob(fileLocation + fileType)
  
  massConvert(fileNames)

  I've looked around and most of the tutorials are in 2.7 the code is 3.3 and I can't find a tutorial to use ffmpeg for 3.3. My ffmpeg is set to 'ffmpeg64' on my PATH.

  Thanks !

• Revision 8357292a5a : Fix test on maximum downscaling limits There is a normative scaling range of (x

  18 juin 2014, par Adrian Grange

  Changed Paths :
   Modify /vp9/common/vp9_convolve.c

  
   Modify /vp9/encoder/vp9_encoder.c

  
  
  Fix test on maximum downscaling limits

  There is a normative scaling range of (x1/2, x16)
  for VP9. This patch fixes the maximum downscaling
  tests that are applied in the convolve function.

  The code used a maximum downscaling limit of x1/5
  for historic reasons related to the scalable
  coding work. Since the downsampling in this
  application is non-normative it will revert to
  using a separate non-normative scaler.

  Change-Id : Ide80ed712cee82fe5cb3c55076ac428295a6019f

• Revision 090d07984f : Fix AQ mode 2 bug where delta causes Q 0. In Aq mode 2 for kf/arf/gf the segmen

  3 juin 2014, par Paul Wilkins

  Changed Paths :
   Modify /vp9/encoder/vp9_aq_complexity.c

  
  
  Fix AQ mode 2 bug where delta causes Q 0.

  In Aq mode 2 for kf/arf/gf the segment q delta
  is calculated and then applied by re-quantization without
  going through the rd loop again. If the base Q != 0
  but the segment Q == 0 (lossless) this can could give rise
  to a situation where we have an illegal combination of
  transform size and Q. (Q == 0 requires that all blocks
  are coded 4x4 WHT).

  Change-Id : I241a58c6494ed442e9e4630070b0cde0fb99ae45