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• Using dragonfly and ffmpeg to process a video in Rails

  26 novembre 2015, par Maikell

  I am writing a Ruby on Rails 4 Web application, that gives the user an image-upload functionality. For this I followed this tutorial, which is using the gems

  dragonfly
  
  jquery-fileupload-rails
  
  remotipart

  This is working fine.
  Now I want to extend the image-upload functionality, to upload videos as well. But unfortunately I’m stuck with it. Here is what I have tried so far :

  config/initializers/dragonfly.rb

  require 'dragonfly'
  
  
  
  # Configure
  
  Dragonfly.app.configure do
  
    plugin :imagemagick
  
  
  
    secret 'd045734b043b4383a246c5c8daf2d3e31217dc8b030f21861e4fd16c4b72d382'
  
  
  
    url_format '/media/:job/:name'
  
  
  
    datastore :file,
  
              root_path: Rails.root.join('uploads/images/'),
  
              server_root: Rails.root.join('uploads')
  
  end
  
  
  
  Dragonfly.app(:videos).configure do
  
    secret 'd045734b043b4383a246c5c8daf2d3e31217dc8b030f21861e4fd16c4b72d382'
  
  
  
    url_format "/media/:job/:name"
  
  
  
    datastore :file,
  
              root_path: Rails.root.join('uploads/videos/'),
  
              server_root: Rails.root.join('uploads')
  
  end
  
  
  
  # Logger
  
  Dragonfly.logger = Rails.logger
  
  
  
  # Mount as middleware
  
  Rails.application.middleware.use Dragonfly::Middleware
  
  
  
  # Add model functionality
  
  if defined?(ActiveRecord::Base)
  
    ActiveRecord::Base.extend Dragonfly::Model
  
    ActiveRecord::Base.extend Dragonfly::Model::Validations
  
  end

  models/video.rb

  class Video < ActiveRecord::Base
  
    dragonfly_accessor :video, app_name: :videos do
  
      storage_options do |video|
  
        { path: "videos/#{Video.gen_uuid}-#{video.name}.webm" }
  
      end
  
    end
  
  end

  I upload the video with ajax. It is succesfully saved in the systems /tmp-directory. Than in the video-controller I call

  @video = Video.new[video_params]
  
  @video.save

  Now the video-params are correctly saved in the database, but the video is not saved in the given directory /uploads/videos Also my goal is, to process the video with ffmpeg, to convert it to a webm. ffmpeg is installed in the system and converting a video on the command line works fine.

  • But how do I get dragonfly to start the conversion process and save the video in the rails project ? Where do I have to put the ffmpeg-commands to dragonfly ?
  • Why does dragonfly not save the video in the directory uploads/videos ?

  Everything works fine with images and imagemagick. Only videos are causing problems.

• i can not upload video in background with delayed_job on heroku ?

  23 novembre 2015, par mokariya

  I used paperclip background process with delay jobs with ffmpeg.

  In paperclip processors folder i have ffmpeg.rb file also.

  my model

  class product < ActiveRecord::Base
  
      has_attached_file :video, :styles => {
  
      :mp4video => { :geometry => "640x480", :format => 'mp4', :convert_options => {:output => {:ar => 44100}} },
  
      :webmvideo =>{ :geometry => "1024x576", :format => 'webm', :convert_options => {:output => {:ar => 44100}} },
  
      :oggvideo => { :geometry => "1024x576", :format => 'ogg', :convert_options => {:output => {:ar => 44100}} },
  
      :thumb => { :geometry => "100x100#", :format => 'jpg', :time => 10 }
  
    },
  
    :storage => :s3,
  
    :s3_credentials => "#{Rails.root}/config/aws.yml",
  
    :processors => [:transcoder]
  
  
  
    process_in_background :video
  
  
  
  end

• mp4,m4v vidoes not play on firefox

  20 novembre 2015, par Waqas Ahad

  Using paperclip-ffmpeg for video uploading in Rails.
  It plays on Chrome but not on Firefox and throws :

  Video format or MIME type is not supported

  I have this code in my model :

  has_attached_file :videod, :styles => { 
  
                          medium => { :geometry => "640x480", :format => 'mp4' },
  
                         :thumb => { :geometry => "100x100#", :format => 'jpg', :time => 10 }
  
  }, :processors => [:ffmpeg]
  
  validates_attachment_size :videod, :less_than => 100.megabytes
  
  validates_attachment_presence :videod
  
  validates_attachment_content_type :videod, :content_type => /\Avideo\/.*\Z/

  I also installed ubuntu-restricted-extras which was required to play it on firefox.

  Result of ffprobe :

  ffprobe version 2.4.3-1ubuntu1~trusty6 Copyright (c) 2007-2014 the FFmpeg developers
  
  built on Nov 22 2014 17:07:19 with gcc 4.8 (Ubuntu 4.8.2-19ubuntu1)
  
  configuration: --prefix=/usr --extra-version='1ubuntu1~trusty6' --build-suffix=-ffmpeg --toolchain=hardened --extra-cflags= --extra-cxxflags= --libdir=/usr/lib/x86_64-linux-gnu --shlibdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --enable-gpl --enable-shared --disable-stripping --enable-avresample --enable-avisynth --enable-fontconfig --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-opengl --enable-x11grab --enable-libxvid --enable-libx265 --enable-libdc1394 --enable-libiec61883 --enable-libzvbi --enable-libzmq --enable-frei0r --enable-libx264 --enable-libsoxr --enable-openal --enable-libopencv
  
    libavutil      54.  7.100 / 54.  7.100
  
    libavcodec     56.  1.100 / 56.  1.100
  
    libavformat    56.  4.101 / 56.  4.101
  
    libavdevice    56.  0.100 / 56.  0.100
  
    libavfilter     5.  1.100 /  5.  1.100
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  0.100 /  3.  0.100
  
    libswresample   1.  1.100 /  1.  1.100
  
    libpostproc    53.  0.100 / 53.  0.100
  
  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'SampleVideo_360x240_2mb.mp4':
  
  Metadata:
  
    major_brand     : isom
  
    minor_version   : 512
  
    compatible_brands: isomiso2avc1mp41
  
    creation_time   : 1970-01-01 00:00:00
  
    encoder         : Lavf53.24.2
  
  Duration: 00:00:26.80, start: 0.000000, bitrate: 626 kb/s
  
  Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 239 kb/s, 15 fps, 15 tbr, 15360 tbn, 30 tbc (default)
  
  Metadata:
  
    creation_time   : 1970-01-01 00:00:00
  
    handler_name    : VideoHandler
  
  Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
  
  Metadata:
  
    creation_time   : 1970-01-01 00:00:00
  
    handler_name    : SoundHandler

  After ffmpeg -i :

  Input #0, mov,mp4,m4a,3gp,3g2,mj2, from 'SampleVideo_360x240_2mb.mp4':
  
  Metadata:
  
    major_brand     : isom
  
    minor_version   : 512
  
    compatible_brands: isomiso2avc1mp41
  
    creation_time   : 1970-01-01 00:00:00
  
    encoder         : Lavf53.24.2
  
  Duration: 00:00:26.80, start: 0.000000, bitrate: 626 kb/s
  
  Stream #0:0(und): Video: h264 (Main) (avc1 / 0x31637661), yuv420p, 320x240 [SAR 1:1 DAR 4:3], 239 kb/s, 15 fps, 15 tbr, 15360 tbn, 30 tbc (default)
  
  Metadata:
  
    creation_time   : 1970-01-01 00:00:00
  
    handler_name    : VideoHandler
  
  Stream #0:1(und): Audio: aac (mp4a / 0x6134706D), 48000 Hz, 5.1, fltp, 383 kb/s (default)
  
  Metadata:
  
    creation_time   : 1970-01-01 00:00:00
  
    handler_name    : SoundHandler