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• Calling python script using a php script accessed by the browser

  16 novembre 2014, par lfalmeida

  I have a php script which will receives uploaded videos and I would like to convert these videos using ffmpeg.

  I created a python script that receives parameters from php and calls ffmpeg to do the conversion.

  index.php

  <?php
  
  
  
  $data = array('filePath' => 'video.mov');
  
  
  
  $result = shell_exec('/usr/bin/python /home/fernando/Workspace/lab1/public_html/converter.py ' . escapeshellarg(json_encode($data)));

  converter.py

  #!/usr/bin/env python
  
  
  
  import os, sys, json, subprocess, string, random
  
  
  
  class Converter():
  
  
  
  WORK_DIR = '/home/fernando/Workspace/lab1/public_html'
  
  DESTINATION_DIR = '/home/fernando/Workspace/lab1/public_html/videos/'
  
  NEW_AUDIO = 'audio.mp3'
  
  
  
  def __init__(self, data):
  
      try:
  
          os.chdir(self.WORK_DIR)
  
          self.arg = data
  
      except:
  
          print "ERROR"
  
          sys.exit(1)     
  
  
  
  
  
  def generateId():
  
      return ''.join(random.choice(string.ascii_uppercase + string.digits + string.ascii_lowercase ) for _ in range(12))      
  
  
  
  
  
  def convertVideo(self, type):
  
  
  
      convertedFileName = self.DESTINATION_DIR + self.generateId() + '.' + type
  
  
  
      typesDic = {
  
                  'mp4': ['/usr/bin/ffmpeg', '-loglevel', 'quiet', '-i', self.arg['filePath'], '-i', self.NEW_AUDIO, '-map', '0:0', '-map', '1', '-shortest', '-codec', 'copy', convertedFileName, '-y'], 
  
                  'ogv': ['/usr/bin/ffmpeg', '-loglevel', 'quiet', '-i', self.arg['filePath'], '-i', self.NEW_AUDIO, '-map', '0:0', '-map', '1', '-shortest', '-vcodec', 'libtheora', '-acodec', 'libvorbis',  convertedFileName, '-y'] 
  
                 }
  
  
  
      sp = subprocess.Popen(typesDic[type], shell=True)
  
  
  
      out, err = sp.communicate()
  
  
  
      if err:
  
          return {'status': 'error'}
  
  
  
      return {'status': 'success', 'filename': convertedFileName}
  
  
  
  
  
  
  
  
  
  data = json.loads(sys.argv[1])
  
  
  
  c = Converter(data)
  
  print c.convertVideo('mp4')
  
  print c.convertVideo('ogv')

  These codes are working the way I need, but only if I call them
   via the command line.
  Ex : $ php index.php
  ou : $ ./converter.py '{"fileName": "video.avi"}'

  If I access via browser, which was my main intention, does not work.

  I wonder what is wrong ?
  You can do this via browser ?
  Would have a better approach ?
  

  edited :
  Output from apache error log

  Use -h to get full help or, even better, run 'man ffmpeg'

  ffmpeg version 1.2.6-7:1.2.6-1 trusty1 Copyright (c) 2000-2014 the FFmpeg developers
  built on Apr 26 2014 18:52:58 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  configuration : —arch=amd64 —disable-stripping —enable-avresample —enable-pthreads —enable-runtime-cpudetect —extra-version=’7:1.2.6-1 trusty1’ —libdir=/usr/lib/x86_64-linux-gnu —prefix=/usr —enable-bzlib —enable-libdc1394 —enable-libfreetype —enable-frei0r —enable-gnutls —enable-libgsm —enable-libmp3lame —enable-librtmp —enable-libopencv —enable-libopenjpeg —enable-libopus —enable-libpulse —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-vaapi —enable-vdpau —enable-libvorbis —enable-libvpx —enable-zlib —enable-gpl —enable-postproc —enable-libcdio —enable-x11grab —enable-libx264 —shlibdir=/usr/lib/x86_64-linux-gnu —enable-shared —disable-static
  libavutil 52. 18.100 / 52. 18.100
  libavcodec 54. 92.100 / 54. 92.100
  libavformat 54. 63.104 / 54. 63.104
  libavdevice 53. 5.103 / 53. 5.103
  libavfilter 3. 42.103 / 3. 42.103
  libswscale 2. 2.100 / 2. 2.100
  libswresample 0. 17.102 / 0. 17.102
  libpostproc 52. 2.100 / 52. 2.100
  Hyper fast Audio and Video encoder
  usage : ffmpeg [options] [[infile options] -i infile]... [outfile options] outfile...

  Use -h to get full help or, even better, run ’man ffmpeg’
  ffmpeg version 1.2.6-7:1.2.6-1 trusty1 Copyright (c) 2000-2014 the FFmpeg developers
  built on Apr 26 2014 18:52:58 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  configuration : —arch=amd64 —disable-stripping —enable-avresample —enable-pthreads —enable-runtime-cpudetect —extra-version=’7:1.2.6-1 trusty1’ —libdir=/usr/lib/x86_64-linux-gnu —prefix=/usr —enable-bzlib —enable-libdc1394 —enable-libfreetype —enable-frei0r —enable-gnutls —enable-libgsm —enable-libmp3lame —enable-librtmp —enable-libopencv —enable-libopenjpeg —enable-libopus —enable-libpulse —enable-libschroedinger —enable-libspeex —enable-libtheora —enable-vaapi —enable-vdpau —enable-libvorbis —enable-libvpx —enable-zlib —enable-gpl —enable-postproc —enable-libcdio —enable-x11grab —enable-libx264 —shlibdir=/usr/lib/x86_64-linux-gnu —enable-shared —disable-static
  libavutil 52. 18.100 / 52. 18.100
  libavcodec 54. 92.100 / 54. 92.100
  libavformat 54. 63.104 / 54. 63.104
  libavdevice 53. 5.103 / 53. 5.103
  libavfilter 3. 42.103 / 3. 42.103
  libswscale 2. 2.100 / 2. 2.100
  libswresample 0. 17.102 / 0. 17.102
  libpostproc 52. 2.100 / 52. 2.100
  Hyper fast Audio and Video encoder
  usage : ffmpeg [options] [[infile options] -i infile]... [outfile options] outfile...

  Use -h to get full help or, even better, run ’man ffmpeg’

• Can't break out of innermost while loop — Bash - Ubuntu

  16 novembre 2014, par Kenny Powers

  Whenever the two MD5 check sums ($SUMCHK1 & $SUMCHK2) match up in this script I get stuck in the innermost while loop, so the script never ends. When the two log files match, I get an endless echo of the two md5sums on the screen.

  #!/bin/bash
  
  
  
  FULLPATH=$1
  
  FPS=$2
  
  AVI=$(basename $1)
  
  AVIDIR=$HOME/q7video/$AVI
  
  TMPFILE=$AVIDIR/tmp.txt
  
  TMPFILE2=$AVIDIR/tmp2.txt
  
  NEWFILES=$AVIDIR/tmp3.txt
  
  FFLOG=$AVIDIR/ffmpeg.log
  
  LOGFILE=$AVIDIR/log.log
  
  FACESDIR=$AVIDIR/faces
  
  
  
  # CREATE FOLDER STRUCTURE, NO ERROR IF DIR PRE-EXISTS
  
  mkdir --parents $AVIDIR
  
  mkdir --parents $FACESDIR
  
  touch $TMPFILE $TMPFILE2 $NEWFILES $LOGFILE
  
  echo $AVI > $LOGFILE
  
  
  
  # DUMP THUMBNAILS FROM SPECIFIED AVI FILE
  
  ffmpeg -i $FULLPATH -f image2 -vf fps=fps=$FPS $AVIDIR/$AVI%03d.jpg null >/dev/null 2>$FFLOG &
  
  
  
  # DELAY TO ALLOW LOOP A WORKING DIRECTORY BEFORE START
  
  sleep 2
  
  
  
  #TOUCH FILES TO PREVENT NO FILE ERROR
  
  touch $TMPFILE $TMPFILE2
  
  
  
  # INITIALIZE VARIABLE FOR LOOP
  
  CHECK=`pgrep ffmpeg`
  
  I=0
  
  SUMCHK1=`md5sum $TMPFILE`
  
  SUMCHK2=`md5sum $TMPFILE2`
  
  
  
  while [[ "$CHECK" -gt "$I" ]]; do
  
      sleep 2
  
      echo FFMPEG RUNNING
  
      ls $AVIDIR/*.jpg > $TMPFILE
  
      while [[ "$SUMCHK1" != "$SUMCHK2" ]]; do
  
          comm -23 $TMPFILE $TMPFILE2 > $NEWFILES
  
          while read F ; do
  
              echo $F
  
              echo $F >> $TMPFILE2
  
              echo $F >> $LOGFILE
  
              python opencvtest.py $F >> $LOGFILE
  
          done < $NEWFILES
  
          ls $AVIDIR/*.jpg > $TMPFILE
  
          SUMCHK1=`md5sum $TMPFILE`
  
          SUMCHK2=`md5sum $TMPFILE2`
  
          echo $SUMCHK1
  
          echo $SUMCHK2
  
      done
  
      CHECK=`pgrep ffmpeg`
  
      echo $CHECK
  
  done
  
  
  
  
  
  
  
  # COPY IMAGES WITH A FACE TO FACESDIR
  
  
  
  
  
  # CLEANUP LOGS
  
  #rm $TMPFILE $TMPFILE2 $NEWFILES

• Bash process substitution in Python with Popen

  2 juin 2015, par moorej

  I’m attempting to create a looped video file by calling ffmpeg from the python subprocess library. Here’s the part that’s giving me problems :

  import subprocess as sp
  
  sp.Popen(['ffmpeg', '-f', 'concat', '-i', "<(for f in ~/Desktop/*.mp4; do echo \"file \'$f\'\"; done)", "-c", "copy", "~/Desktop/sample3.mp4"])

  With the above code I’m getting the following error :

  <(for f in /home/delta/Desktop/*.mp4; do echo "file '$f'"; done): No such file or directory

  I did find a similarly phrased question here. But I’m not sure how the solution might apply to solving my issue.

  Edit :
  Thanks for the help everyone ! Following the advice in the comments and looking elsewhere I ended up changing the code to this :

  sp.Popen("ffmpeg -f concat -i <(for f in ~/Desktop/*.mp4; do echo \"file \'$f\'\"; done) -c copy ~/Desktop/sample3.mp4", shell=True, executable="/bin/bash")

  —which works fine.