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• 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

• Oddly-named file "not found" when trying to move/copy via MacOS Terminal [closed]

  15 juin 2024, par Ben C

  This is a head scratcher.

  


  I need to move these three oddly-named files from an external 2.5" SSD to my desktop. The file names were intended to have variables replaced by date info, however, clearly it didn't work. So I'm left with these filenames that MacOS seems to want to interpret rather than treat as a string. I wish it was as easy as tossing in single quotes or escaping chars, but so far, that hasn't worked.

  


  Files: Test01-$(internal:date_y)-$(internal:date_m)-$(internal:date_d)-.mp4 Test01-$(internal:date_y)-$(internal:date_m)-$(internal:date_d)-0001.mp4 Test01-$(internal:date_y)-$(internal:date_m)-$(internal:date_d)-0002.mp4

  


  I'm on MacOS. In the Finder, the files are not visible. But they are not hidden files.

  


  In Terminal, however, when I navigate to "/Volumes/TestDrive", then run a quick "ls", I can see all three files no problem. Including permissions, size, owners, full filename, etc.

  


  However, when I attempt to move the files to my desktop, and rename in the process (even if I don't rename), Terminal tells me that "No such file or folder can be found" or something very close to that.

  


  I've tried using mv and cp commands to put the filename in single quotes so the filename is read literally. Yet, I'm still given feedback that the file cannot be transferred because it cannot be found or doesn't exist.

  


  mv 'Test01-$(internal:date_y)-$(internal:date_m)-$(internal:date_d)-.mp4' ~/Desktop/Test01-01.mp4' 'cp 'Test01-$(internal:date_y)-$(internal:date_m)-$(internal:date_d)-.mp4' ~/Desktop/Test01-01.mp4

  


  When I try to escape special characters instead of quotes, I am also told the file doesn't exist. But clearly it does when I list out the contents of the drive. And there's only 3x .mp4 files, two hiddne files .fseventsd and some spotlight file.

  


  mv Test01-\$\(internal\:date_y\)-\$\(internal\:date_m\)-\$\(internal\:date_d\)-.mp4 ~/Desktop/Test01-01.mp4

  


  I've tried copying by inode. No luck. I've tried pulling the videos into ffmpeg (CLI based media mgmt tool) to see if I can get some info on the files, and same thing, ffmpeg (or ffprobe) both will tell me the file doesn't exist...even though I can list the files and see that it does.

  


  I hope I'm missing something obvious, but but it seems all the obvious approaches are not yet working for me.

  


  So my question is, what do I need to do to make these files "exist" so that I can rename them and back them up ? Happy to go down any rabbit hole.

  


  Thanks in advance !

  


• FFMPEG Command working ok from terminal but not when launched as a process

  16 juin 2023, par Pit Digger

  I am launching an FFMPEG process from C++ , the command is workign fine from command line, but gives error when laucnhed from code. What could cause this ?

  


  [AVFilterGraph @ 0x3cfadc0] Error parsing filterchain '"[0:v]split=3[v1][v2][v3] ;[v1]copy[v1out] ;[v2]scale=w=1280:h=720[v2out] ;[v3]scale=w=640:h=360[v3out]"'

  


  AVFilterGraph @ 0x3cfadc0] Trailing garbage after a filter : split=3[v1][v2][v3] ;[v1]copy[v1out] ;[v2]scale=w=1280:h=720[v2out] ;[v3]scale=w=640:h=360[v3out]"

  


  Command :

  


  ffmpeg -re -i input.mp4 -c copy -filter_complex "[0:v]split=3[v1][v2][v3] ;[v1]copy[v1out] ;[v2]scale=w=1280:h=720[v2out] ;[v3]scale=w=640:h=360[v3out]" -map [v1out] -c:v:0 libx264 -x264-params "nal-hrd=cbr:force-cfr=1" -b:v:0 1M -maxrate:v:0 2M -minrate:v:0 2M -bufsize:v:0 2M -preset fast -g 48 -sc_threshold 0 -keyint_min 48 -map [v2out] -c:v:1 libx264 -x264-params 'nal-hrd=cbr:force-cfr=1' -b:v:1 1M -maxrate:v:1 1M -minrate:v:1 1M -bufsize:v:1 1M -preset fast -g 48 -sc_threshold 0 -keyint_min 48 -map [v3out] -c:v:2 libx264 -x264-params 'nal-hrd=cbr:force-cfr=1' -b:v:2 500K -maxrate:v:2 500K -minrate:v:2 500K -bufsize:v:2 500K -preset fast -g 48 -sc_threshold 0 -keyint_min 48 -map a:0 -c:a:0 aac -b:a:0 96k -ac 2 -map a:0 -c:a:1 aac -b:a:1 96k -ac 2 -map a:0 -c:a:2 aac -b:a:2 48k -ac 2 -avoid_negative_ts 1 -f hls -hls_time 6 -hls_list_size 15 -hls_flags independent_segments -hls_segment_type mpegts -hls_segment_filename /output/stream_%v_data%02d.ts -master_pl_name index.m3u8 -var_stream_map 'v:0,a:0 v:1,a:1 v:2,a:2' /output/stream_%v.m3u8