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• use grunt for jshint and uglify

  12 mars 2013, par brandonaaron

  use grunt for jshint and uglify

• can't install ffmpeg in ubuntu

  5 février 2013, par john

  I tried to install ffmpeg in ubundu.using the command sudo apt-get install ffmpeg

  But i can't install it.It Shows an error.Following is the out put when i tried to install ffmpeg.

  wds@wds:~$ sudo apt-get install ffmpeg
  
  [sudo] password for wds: 
  
  Reading package lists... Done
  
  Building dependency tree       
  
  Reading state information... Done
  
  The following extra packages will be installed:
  
    libavfilter1
  
  The following NEW packages will be installed:
  
    ffmpeg libavfilter1
  
  0 upgraded, 2 newly installed, 0 to remove and 3 not upgraded.
  
  Need to get 357kB of archives.
  
  After this operation, 1,282kB of additional disk space will be used.
  
  Do you want to continue [Y/n]? y
  
  WARNING: The following packages cannot be authenticated!
  
    libavfilter1 ffmpeg
  
  Install these packages without verification [y/N]? y
  
  Err http://us.archive.ubuntu.com/ubuntu/ maverick-updates/main libavfilter1 i386 4:0.6-2ubuntu6.3
  
    404  Not Found [IP: 91.189.91.15 80]
  
  Err http://security.ubuntu.com/ubuntu/ maverick-security/main libavfilter1 i386 4:0.6-2ubuntu6.3
  
    404  Not Found [IP: 91.189.92.200 80]
  
  Err http://security.ubuntu.com/ubuntu/ maverick-security/main ffmpeg i386 4:0.6-2ubuntu6.3
  
    404  Not Found [IP: 91.189.92.200 80]
  
  Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/f/ffmpeg/libavfilter1_0.6-2ubuntu6.3_i386.deb  404  Not Found [IP: 91.189.92.200 80]
  
  Failed to fetch http://security.ubuntu.com/ubuntu/pool/main/f/ffmpeg/ffmpeg_0.6-2ubuntu6.3_i386.deb  404  Not Found [IP: 91.189.92.200 80]
  
  E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
  
  wds@wds:~$ 

  It shows a 404 error.when installing.

• how to allow a worker to run a ffmpeg command on heroku for my python/django app ?

  10 mars 2013, par GetItDone

  I've been stuck trying to figure this out for weeks. I previously asked a similar question found here but I never got any replies. I really cannot find any good documentation anywhere. All I need to do is use a worker (don't care what worker have django-celery and rq installed) to convert a file to flv when it is uploaded from a form. I was able to get this done easily locally, but after over a week I haven't been able to get it to work no matter what I have tried. I tried adding a tasks.py file for celery, or a worker.py file for rq, and I have no idea what else (if anything) needs to be done, such as in my settings.py or Procfile. My procfile looks like :

  web: gunicorn lftv.wsgi -b 0.0.0.0:$PORT
  
  celeryd: celery -A tasks worker --loglevel=info
  
  worker: python worker.py

  My requirements.txt showing what I have installed looks like this :

  Django==1.4.3
  
  Logbook==0.4.1
  
  amqp==1.0.6
  
  anyjson==0.3.3
  
  billiard==2.7.3.19
  
  boto==2.6.0
  
  celery==3.0.13
  
  celery-with-redis==3.0
  
  distribute==0.6.31
  
  dj-database-url==0.2.1
  
  django-celery==3.0.11
  
  django-s3-folder-storage==0.1
  
  django-storages==1.1.6
  
  gunicorn==0.16.1
  
  kombu==2.5.4
  
  pil==1.1.7
  
  psycopg2==2.4.5
  
  python-dateutil==1.5
  
  pytz==2012j
  
  redis==2.7.2
  
  requests==1.1.0
  
  rq==0.3.2
  
  six==1.2.0
  
  times==0.6

  The only thing relevant in my settings.py are as follows :

  BROKER_BACKEND = 'django'
  
  BROKER_URL = #For this I copy/pasted the code from my redistogo add-on from heroku. Not sure if correct
  
  BROKER_TRANSPORT_OPTIONS = {'visibility_timeout': 1800}

  Without trying to take up too much more space, my tasks.py looks like this :

  import subprocess
  
  
  
  @task
  
  def ffmpeg_conversion(input_file):
  
      converted_file = subprocess.call(input_file)
  
      return converted_file

  I use S3 to store my static and media files, and the upload works (adding uploads to my bucket), however no matter what I try the conversion never will. Is there a good tutorial for absolute beginners ? I followed the heroku redis tutorial, celery docs, rq docs, and whatever else I can find, and got the examples to work, but the worker will not execute the command from my view. For example one of the many things I tried :

  ...
  
  ffmpeg = "ffmpeg -i %s -acodec mp3 -ar 22050 -f flv -s 320x240 %s" % (sourcefile, targetfile)
  
  ffmpegresult = ffmpeg_conversion.delay(ffmpeg)
  
  ...

  or using rq

  ...
  
  q = Queue(connection=conn)
  
  result = q.enqueue(ffmpeg_conversion, ffmpeg)
  
  ...

  I seems like it should be simple, however I am completely self-taught and have never deployed a project whatsoever, and there just doesn't seem to be any good documentation or tutorial available for what I am trying to do. I can't judge whether I am completely off and completely missing something significant or relatively close to getting this to work. I really do appreciate any input whatsoever, this is driving me nuts. Thanks in advance.