Recherche avancée

Sur d’autres sites (17800)

• Executing ffmpeg command using Popen

  21 septembre 2014, par dragonator

  I have a strange problem trying to execute ffmpeg command using Popen.
  I have the following piece of code, which I use for executing an external commands in Python :

  from subprocess import Popen, PIPE
  
  from datetime import datetime
  
  
  
  
  
  class Executor(object):
  
  
  
      @classmethod
  
      def execute(cls, command):
  
          """
  
          Executing a given command and
  
          writing into a log file in cases where errors arise.
  
          """
  
          p = Popen(command, stdin=PIPE, stdout=PIPE, stderr=PIPE)
  
          output, err = p.communicate()
  
          if p.returncode:
  
              with open("failed_commands.log", 'a') as log:
  
                  now = datetime.now()
  
                  log.write('{}/{}/{} , {}:{}:{}\n\n'.format(now.day, now.month,
  
                                                             now.year, now.hour,
  
                                                             now.minute,
  
                                                             now.second))
  
  
  
                  log.write("COMMAND:\n{}\n\n".format(" ".join(command)))
  
                  log.write("OUTPUT:\n{}\n\n".format(output.decode("utf-8")))
  
                  log.write("ERRORS:\n{}\n".format(err.decode("utf-8")))
  
                  log.write('-'*40)
  
                  log.write('\n')
  
  
  
              return ''
  
  
  
          if not output:
  
              output += ' '
  
  
  
          return output

  I’ve tested it with others commands, but when I try to execute ffmpeg command - it fails.
  I’m trying to convert some audio format to mp3 format.
  Here is an example of my command :

  ffmpeg -i "/path/old_song.m4a" "/path/new_song.mp3"

  ...simple as that.When I run it in terminal it works fine, but when I try to execute it using the above function it fails.
  Here is the exact error :

  ----------------------------------------
  
  21/9/2014 , 19:48:50
  
  
  
  COMMAND:
  
  ffmpeg -i "/path/old_song.m4a" "/path/new_song.mp3"
  
  
  
  OUTPUT:
  
  
  
  
  
  ERRORS:
  
  ffmpeg version 2.2.3 Copyright (c) 2000-2014 the FFmpeg developers
  
    built on Jun  9 2014 08:01:43 with gcc 4.9.0 (GCC) 20140521 (prerelease)
  
    configuration: --prefix=/usr --disable-debug --disable-static --enable-avisynth --enable-avresample --enable-dxva2 --enable-fontconfig --enable-gnutls --enable-gpl --enable-libass --enable-libbluray --enable-libfreetype --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopencore_amrnb --enable-libopencore_amrwb --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libspeex --enable-libtheora --enable-libv4l2 --enable-libvorbis --enable-libvpx --enable-libx264 --enable-libx265 --enable-libxvid --enable-pic --enable-postproc --enable-runtime-cpudetect --enable-shared --enable-swresample --enable-vdpau --enable-version3 --enable-x11grab
  
    libavutil      52. 66.100 / 52. 66.100
  
    libavcodec     55. 52.102 / 55. 52.102
  
    libavformat    55. 33.100 / 55. 33.100
  
    libavdevice    55. 10.100 / 55. 10.100
  
    libavfilter     4.  2.100 /  4.  2.100
  
    libavresample   1.  2.  0 /  1.  2.  0
  
    libswscale      2.  5.102 /  2.  5.102
  
    libswresample   0. 18.100 /  0. 18.100
  
    libpostproc    52.  3.100 / 52.  3.100
  
  "/path/old_song.m4a": No such file or directory
  
  Conversion failed!
  
  
  
  ----------------------------------------

  ...and as you can think of - the file exists.

  I think there is something in passing the command to Popen.communicate but I don’t know exactly.

  Kind regards,

  Teodor D.
  PS : I’m passing the command to Executor.execute as Python list.

  PSS : Calling the Executor.execute :

  def process_conversion(self):
  
      for song in self.files_to_convert:
  
          current_format = song.rsplit('.', 1)[-1]
  
  
  
          old_file = '"{}{}{}"'.format(self.target_dir, os.sep, song)
  
          new_file = '"{}{}{}"'.format(self.target_dir, os.sep,
  
                                       song.replace(current_format, 'mp3'))
  
  
  
          command = ["ffmpeg", "-i", old_file, new_file]
  
          Executor.execute(command)

• Revision 87176 : Amélioration de la gestion des logos, permet (via un autre plugin par ...

  22 janvier 2015, par kent1@… — Log

  Amélioration de la gestion des logos, permet (via un autre plugin par exemple) d’avoir d’autres fichiers dans le formulaire d’édition d’auteur

• How do I compile the x264 encoder with Visual studio 2013 ? [on hold]

  26 avril 2015, par Pazuzukin

  Is it possible to build the x264 encoder with Visual Studio 2013 community edition, and if it is what are the steps to build the x264 encoder with VS2013 ?
  I’m running Windows 7 Profession 64 bit and Visual Studio 2013 Community