Newest 'ffmpeg' Questions - Stack Overflow

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  • How to join two ffmpeg commands

    26 novembre 2012, par Ambrose Bwangatto

    i have a script which uses this ffmpeg command's parameters for encoding videos.

    ffmpeg -i inputfile -acodec libfaac -keyint_min 20 -r 20 -vcodec libx264 -vpre hq -crf 25 -b 300k -bt 300k -y -v 0 -bf 16 -threads 0 outputfile

    and i have a custom command i would like to add to it, is like this 

    ffmpeg -i inputfile -vf "movie=watermark.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" outputfile

    so i replaced main command like this 

     ffmpeg -i inputfile -acodec libfaac -keyint_min 20 -r 20 -vcodec libx264 -vpre hq -crf 25 -b 300k -bt 300k -y -v 0 -bf 16 -threads 0 -vf "movie=watermark1.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" outputfile

    and tried it in command line, but this doesnt do anything, the output is nothing like this 

    [root@www test1]#  ffmpeg -i test1800.mp4 -acodec libfaac -keyint_min 20 -r 20 -vcodec libx264 -vpre hq -crf 25 -b 300k -bt 300k -y -v 0 -bf 16 -threads 0 -vf "movie=watermark1.png [watermark]; [in][watermark] overlay=main_w-overlay_w-10:main_h-overlay_h-10 [out]" outputfile.mp4
[root@www test1]#

    how do i solve this ?

    Thanks for your time.

    UPDATE My ffmpeg command details

    [root@www test1]# ffmpeg
ffmpeg version N-47061-gbe2c0bc Copyright (c) 2000-2012 the FFmpeg developers
  built on Nov 25 2012 09:32:08 with gcc 4.1.2 (GCC) 20080704 (Red Hat 4.1.2-52)
  configuration: --enable-gpl --enable-libmp3lame --enable-libvorbis --enable-libvpx --enable-libx264
  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
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...

Use -h to get full help or, even better, run 'man ffmpeg'

    thanks

  • ffmpeg crash after complaining about unreleased buffer ? [closed]

    26 novembre 2012, par twid

    I get following error in ffmpeg. And then ffmpeg crashes.....

    [mpeg4 @ 03b72ec0] Found 2 unreleased buffers!   
Assertion i < avci->buffer_count failed at libavcodec/utils.c:603

    I want know why and what circumstances it crashing?

  • join audio file in specific time of the video ffmpeg

    25 novembre 2012, par George L.

    i am trying to use the code bellow to merge an audio file at specific time (6th second of my input video) and create a new video autput file but i cant make it work.

    <?php

exec("/usr/local/bin/ffmpeg -sameq -i /home/xxx/public_html/xxx/video/full.mp4 -itsoffet 6 -i /home/xxx/public_html/xxx/sounds/names/george.mp3 /home/xxx/public_html/xxx/upload/sample.mpg");


?>

    Thank you a lot!

  • 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

  • Video Slideshow from png files + mp3 audio

    25 novembre 2012, par James Evans

    I have a bunch of .png frames and a .mp3 audio file which I would like to convert into a video. Unfortunately, the frames do not correspond to a constant frame rate. For instance, one frame may need to be displayed for 1 second, whereas another may need to be displayed for 3 seconds.

    Is there any open-source software (something like ffmpeg) which would help me accomplish this? Any feedback would be greatly appreciated.

    Many thanks!

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