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• 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.

• Exit Status with ffmpeg Command in Rails

  25 novembre 2012, par DragonFire353

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

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

  I was using purely paperclip before and making the user wait and it worked great, now I am having problems with the return of the error status for the command, I have tried editing to possible fix the command wondering if it was failing in the first place but I keep getting :

  undefined method `exitstatus' for nil:NilClass

  no matter what. I've tried looking this up and it's supposedly valid syntax that should work... Also I've commented out the actual spawn do part because I get another error if I leave that in :

  wrong number of arguments

  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
  
    include AASM
  
  
  
    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"
  
    #, :styles => { 
  
       # :video => { geometry: "800x480>", format: 'webm' },
  
       # :thumb => { geometry: "200x200>", format: 'png', time: 3 },
  
     # }, processors: [:ffmpeg], 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
  
  
  
    #acts as state machine plugin
  
    aasm state: :pending do
  
     state :pending, initial: true
  
     state :converting
  
     state :converted
  
     #, enter: :set_new_filename
  
     state :error
  
  
  
      event :convert do
  
       transitions from: :pending, to: :converting
  
     end
  
  
  
      event :converted do
  
       transitions from: :converting, to: :converted
  
     end
  
  
  
      event :failure do
  
        transitions from: :converting, to: :error
  
      end
  
    end
  
  
  
     # This method is called from the controller and takes care of the converting
  
    def convert
  
      self.convert!
  
  
  
      #spawn a new thread to handle conversion
  
      #spawn do
  
        success = delay.system(convert_command)
  
        logger.debug 'Converting File: ' + success.to_s
  
        if success && $?.exitstatus.to_i == 0
  
          self.converted!
  
        else
  
          self.failure!
  
        end
  
      #end
  
    end
  
  
  
    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
  
      def convert_command
  
        #construct new file extension
  
        webm =  "." + id.to_s + ".webm"
  
  
  
        #build the command to execute ffmpeg
  
        command = <<-end_command
  
          ffmpeg -i #{ RAILS_ROOT + '/public/users/:user_id/videos/:id/:basename_:style.:extension' }  -ar 22050 -ab 32 -s 1280x720 -vcodec webm -r 25 -qscale 8 -f webm -y #{ RAILS_ROOT + '/public/users/:user_id/videos/:id/:basename_.webm' }
  
  
  
        end_command
  
  
  
        logger.debug "Converting video...command: " + command
  
        command
  
      end
  
  
  
      handle_asynchronously :convert_command
  
  
  
      # 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.convert
  
          flash[:success] = "Uploaded Succefully!"
  
          redirect_to @video.user
  
      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