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• FFmpeg - Extracting video and audio from transport stream file (.ts)

  25 juillet 2015, par Passepartout

  I wish to extract the audio and video of a certain program in a transport stream file (.ts) by specifying its PID without losing quality and using the same codec in the resulting file (the output file is a MPEG).

  Is that even possible with FFmpeg ? If so, how can I do it ?

  So far, I’ve come to this command :

   ffmpeg -i tsfile.ts -vcodec copy -acodec copy -q:v 1 output.mpg

  Edit : Note that the file output.mpg is created. The file contains the video but the audio isn’t attached (no sound). Also, I am unable to specify the program PID to extract.

  Edit 2 : Here’s the output of ffmpeg -i tsfile.ts

  ffmpeg version N-47062-g26c531c Copyright (c) 2000-2012 the FFmpeg developers
  
  built on Nov 25 2012 12:21:26 with gcc 4.7.2 (GCC)
  
      libavutil      52.  9.100 / 52.  9.100
  
      libavcodec     54. 77.100 / 54. 77.100
  
      libavformat    54. 37.100 / 54. 37.100
  
      libavdevice    54.  3.100 / 54.  3.100
  
      libavfilter     3. 23.102 /  3. 23.102
  
      libswscale      2.  1.102 /  2.  1.102
  
      libswresample   0. 17.101 /  0. 17.101
  
      libpostproc    52.  2.100 / 52.  2.100
  
  [mpeg2video @ 0201c7a0] mpeg_decode_postinit() failure
  
  Last message repeated 10 times
  
  [mpegts @ 0037b800] PES packet size mismatch
  
  Input #0, mpegts, from 'tsfile.ts':
  
  Duration: 00:01:30.58, start: 56297.848344, bitrate: 18045 kb/s
  
  Program 1
  
      Stream #0:0[0x31]: Video: mpeg2video (Main) ([2][0][0][0] / 0x0002), yuv420p, 1920x1080  [SAR 1:1 DAR 16:9], 29.97 fps, 29.97 tbr, 90k tbn, 59.94 tbc
  
      Stream #0:1[0x34]: Audio: ac3 ([129][0][0][0] / 0x0081), 48000 Hz, 5.1(side), s16, 384      kb/s

  Here’s a tsinfo.exe on the .ts file :

  Reading from C:\tsfile.ts
  
  Scanning 10000 TS packets
  
  
  
  Packet 1 is PAT
  
  Program list:
  
      Program 1 -> PID 0020 (32)
  
  
  
  Packet 2 is PMT with PID 0020 (32)
  
    Program 1, version 1, PCR PID 0031 (49)
  
       Program info (38 bytes): 0e 03 c0 b9 16 10 06 c0 02 71 c0 04 00 0b 02 42 3f 05 04
  
                                47 41 39 34 86 0d e2 65 6e 67 7e 3f ff 65 6e 67 c1 3f ff
  
   maximum bitrate (3 bytes): c0 b9 16
  
   smoothing buffer (6 bytes): c0 02 71 c0 04 00
  
   system clock (2 bytes): 42 3f
  
   Registration GA94
  
   Descriptor tag 86 (134) (13 bytes): e2 65 6e 67 7e 3f ff 65 6e 67 c1 3f ff
  
    Program streams:
  
  PID 0031 (  49) -> Stream type 02 (  2) H.262/13818-2 video (MPEG-2) or 11172-2 constrained video
  
  PID 0034 (  52) -> Stream type 81 (129) User private
  
      ES info (6 bytes): 6a 04 41 43 2d 33
  
      DVB AC-3 (4 bytes): 41 43 2d 33
  
  
  
  Found 14 PAT packets and 7 PMT packets in 10000 TS packets

• 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 error m4v to flv requested bitrate is too low

  20 décembre 2012, par Pradeep Singh

  ---

  FFMPEG OUTPUT

  ---

  COMMAND

  /usr/local/bin/ffmpeg -i '/home/machine/public_html/video_1355531272.m4v' -s '640x480' -sameq -ab '64k' -ar '44100' -f 'flv' -pass '1' -passlogfile '/home/machine/public_html/tmp/1355531273-50cbc4090d696-multipass'  -y /home/machine/public_html/tmp/1355531273-50cbc4090d2a9.flv &> /home/machine/public_html/tmp/1355531273-50cbc4090da7c.info
  
  /usr/local/bin/ffmpeg -i '/home/machine/public_html/video_1355531272.m4v' -s '640x480' -sameq -ab '64k' -ar '44100' -f 'flv' -pass '2' -passlogfile '/home/machine/public_html/tmp/1355531273-50cbc4090d696-multipass'  -y /home/machine/public_html/tmp/1355531273-50cbc4090d2a9.flv &> /home/machine/public_html/tmp/1355531273-50cbc4090da7c.info
  
  eng): Video: h264, yuv420p, 960x540, 3428 kb/s, 29.97 fps, 29.97 tbr, 2997 tbn, 5994 tbc
  
      Metadata:
  
        creation_time   : 2012-12-14 22:50:55
  
      Stream #0.1(eng): Audio: aac, 44100 Hz, stereo, s16, 111 kb/s
  
      Metadata:
  
        creation_time   : 2012-12-14 22:50:55
  
  [buffer @ 0xdd079d0] w:960 h:540 pixfmt:yuv420p
  
  [scale @ 0xdd07da0] w:960 h:540 fmt:yuv420p -> w:640 h:480 fmt:yuv420p flags:0xa0000004
  
  [flv @ 0xdd041c0] requested bitrate is too low
  
  Output #0, flv, to '/home/machine/public_html/tmp/1355531273-50cbc4090d2a9.flv':
  
      Stream #0.0(eng): Video: flv, yuv420p, 640x480, q=2-31, pass 2, 200 kb/s, 90k tbn, 29.97 tbc
  
      Metadata:
  
        creation_time   : 2012-12-14 22:50:55
  
      Stream #0.1(eng): Audio: adpcm_swf, 44100 Hz, stereo, s16, 64 kb/s
  
      Metadata:
  
        creation_time   : 2012-12-14 22:50:55
  
  Stream mapping:
  
    Stream #0.0 -> #0.0
  
    Stream #0.1 -> #0.1
  
  Error while opening encoder for output stream #0.0 - maybe incorrect parameters such as bit_rate, rate, width or height
  
  -------------------------------
  
  RESULT
  
  -------------------------------
  
  Execute error. Output for file "/home/machine/public_html/video_1355531272.m4v" was found, but the file contained no data. Please check the available codecs compiled with FFmpeg can support this type of conversion. You can check the encode decode availability by inspecting the output array from PHPVideoToolkit::getFFmpegInfo().