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• Background Video Processing with Rails

  23 octobre 2013, par Matthew Snyder

  I am trying to get uploaded videos to be converted in the background, running windows. Some of what I am using :

  gem 'paperclip'
  
  gem 'delayed_job_active_record'
  
  gem 'ffmpeg'

  I have edited the registry to allow the ffmpeg command to be ran from anywhere, I get a popup that I assume is ffmpeg because it goes away too quickly, guess the command is wrong so if anyone knows what's wrong with it please let me know. But the real problem is that it just hangs there, it says :

  [2012-12-09 22:47:03] ERROR invalid body size.
  
  [2012-12-09 22:47:03] ERROR Errno::ECONNABORTED: An established connection was a
  
  borted by the software in your host machine.
  
          C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpresponse.rb:396:i
  
  n `write'
  
          C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpresponse.rb:396:i
  
  n `<<'
  
          C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpresponse.rb:396:i
  
  n `_write_data'
  
          C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpresponse.rb:368:i
  
  n `send_body_string'
  
          C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpresponse.rb:249:i
  
  n `send_body'
  
          C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpresponse.rb:152:i
  
  n `send_response'
  
          C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/httpserver.rb:110:in
  
  `run'
  
          C:/RailsInstaller/Ruby1.9.3/lib/ruby/1.9.1/webrick/server.rb:191:in `blo
  
  ck in start_thread'

  Does anyone know how to properly get this working ? I've went through a few tutorials that have bits and pieces of what I need but I can't get them working together. Here's what I have so far, lemme know if you need more :

  Model :

  class Video < ActiveRecord::Base
  
  
  
    belongs_to :user
  
    has_many :comments, dependent: :destroy
  
    attr_accessible :video, :user_id, :video_file_name, :title, :public, :description, :views
  
  
  
    has_attached_file :video, url: "/users/:user_id/videos/:id/:basename_:style.:extension"
  
  
  
    #process_in_background :video #causes death
  
  
  
    validates :video, presence: true
  
    validates :description, presence: true, length: { minimum: 5, maximum: 100}
  
    validates :title, presence: true, length: { minimum: 1, maximum: 15 }
  
  
  
    validates_attachment_size :video, less_than: 1.gigabytes
  
    validates_attachment :video, presence: true
  
  
  
    default_scope order: 'created_at DESC'
  
  
  
    Paperclip.interpolates :user_id do |attachment, style|attachment.instance.user_id
  
    end
  
  
  
    #before_post_process do |video|
  
     # false if video.status == "converting"
  
    #end
  
  
  
    def perform
  
      command = <<-end_command
  
        start ffmpeg -i #{ '/public/users/:user_id/videos/:id/:basename_:style.:extension' }  -ar 22050 -ab 32 -s 1280x720 -vcodec webm -r 25 -qscale 8 -f webm -y #{ '/public/users/:user_id/videos/:id/:basename_.webm' }
  
  
  
      end_command
  
      success = system(command)
  
      logger.debug 'Converting File: ' + success.to_s
  
      if success && $?.exitstatus.to_i == 0
  
        #self.converted!
  
        self.status = "converted"
  
      else
  
        #self.failure!
  
        self.status = "failed"
  
      end
  
    end
  
  
  
    handle_asynchronously :perform
  
  
  
    def self.search(search)
  
      if search
  
        find(:all, conditions: ["public = 't' AND title LIKE ?", "%#{search}%"], order: "created_at DESC")
  
      else
  
        find(:all, conditions: ["public = 't'"], order: "created_at DESC")
  
      end
  
    end
  
  
  
    def self.admin_search(search)
  
      if search
  
        find(:all, conditions: ['title LIKE ?', "%#{search}%"], order: "created_at DESC")
  
      else
  
        find(:all, order: "created_at DESC")
  
      end
  
    end
  
  
  
    private
  
  
  
      # This updates the stored filename with the new flash video file
  
      def set_new_filename
  
        #update_attribute(:filename, "#{filename}.#{id}.webm")
  
        update_attribute(:content_type, "video/x-webm")
  
      end
  
  
  
  end

  Controller :

  class VideosController < ApplicationController
  
      before_filter :signed_in_user, only: [:upload, :update, :destroy]
  
      before_filter :admin_user, only: :admin_index
  
  
  
      def upload
  
          @video = Video.new
  
          # generate a unique id for the upload
  
          @uuid = (0..29).to_a.map {|x| rand(10)}
  
      end
  
  
  
      def create
  
          @video = Video.new(params[:video])
  
          @video.user_id = current_user.id
  
  
  
          if @video.save
  
              @video.delay.perform
  
              flash[:success] = "Uploaded Succefully!"
  
              redirect_to @video.user
  
              Delayed::Worker.new.start
  
          else
  
              render 'upload'
  
          end
  
      end
  
  
  
      def show
  
          @video = Video.find(params[:id])
  
          @comments = @video.comments.paginate(page: params[:page], per_page: 6)
  
          if !@video.public
  
              if !signed_in? || current_user.id != @video.user_id  && !current_user.admin && !current_user.approved?(@video.user)
  
              flash[:notice] = "Video is private"
  
              redirect_to root_path
  
          end
  
      end
  
      end
  
  
  
      def update
  
          @video = Video.find(params[:id])
  
          if @video.update_attributes(params[:video])
  
        flash[:success] = "Video preferences saved"
  
      else
  
          flash[:fail] = "Failed to update video preferences"
  
      end
  
      redirect_to :back
  
    end
  
  
  
      def destroy
  
          @video = Video.find(params[:id])
  
          @video.destroy
  
          flash[:deleted] = "Deleted Succefully!"
  
          redirect_to :back
  
      end
  
  
  
      def index
  
          @videos = Video.paginate(page: params[:page], per_page: 6).search(params[:search])
  
      end
  
  
  
      def admin_index
  
          @videos = Video.paginate(page: params[:page], per_page: 6).admin_search(params[:search])
  
      end
  
  
  
      def ajax_video_comments
  
          @video = Video.find(params[:id])
  
          @comments = @video.comments.paginate(page: params[:page], per_page: 6)
  
  
  
          respond_to do |format|
  
          format.js   { render partial: 'shared/comments', content_type: 'text/html' }
  
      end
  
      end
  
  
  
      def ajax_video_watched
  
          @video = Video.find(params[:id])
  
          @video.views += 1
  
          @video.save
  
      end
  
  
  
      private
  
  
  
      def signed_in_user
  
          redirect_to root_path, notice: "Please Login." unless signed_in?
  
      end
  
  
  
      def admin_user
  
          redirect_to(root_path) unless current_user.admin?
  
      end
  
  
  
  end

• ffmpeg : wmv files generated on Mac can't be played in Windows

  16 juin 2015, par TTZ

  On Mac OS X 10.6.8, I converted a animated gif to a video file in wmv (a requested file format) by using

  ffmpeg -i File.gif -s 400x400 NewFile.wmv

  The video file played fine using VLC on Mac.
  The file can’t be played on a Windows 7 machine using the Windows Media Player. Is there a way that I can save the animated gif as a WMV file that can be played using the Windows Media Player on a Windows 7 machine ?

  Many thanks for your time !

• FFMPEG streaming all Images instead of last

  8 juin 2015, par Sid411

  I am taking a snapshot of the screen and saving the image to hard disk.
  After saving the image I stream the image using FFMPEG to another machine. I replace the same image in the disk as I want to stream the latest image.
  However when I stream the image, the other machine plays all the previous images too.
  Can someone please tell me why this happens even though I delete my previous image.

  The FFMPEG command that I am using is

  ffmpeg -re -loop 1 -r 15 -vcodec mjpeg -i /home/image.jpg http://localhost:8072/feed1.ffm

  Also, the streaming stops after a certain time.

  Can some one guide me on these two issues ?

  Thank you.