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• Paperclip autoconvert GIF to MP4

  2 décembre 2014, par Mark Boulder

  I’m trying to autoconvert animated GIFs to MP4 using paperclip-ffmpeg — but why are the newly created .flv files empty ?

  app/models/photo.rb

  class Photo < ActiveRecord::Base
  
    has_attached_file :attachment, :styles => {
  
      medium: {format: "flv"},
  
      thumbnail: {format: "png"}
  
    }, :processors => [:ffmpeg]
  
  
  
    belongs_to :post, class_name: "Forem::Post"
  
  
  
    validates_attachment :attachment, presence: true, content_type: { content_type: ["image/jpg", "image/jpeg", "image/png", "image/gif"] }
  
  end

  config/environments/development.rb
  Paperclip.options[:command_path] = "/usr/bin/"

  Please try with this live app : http://runnable.com/VF91dsT_ufU_OLLG/rails-paperclip-gif-to-mp4

  Login : admin@example.com

  Password : admin1234

  Example GIF :

  

  ffmpeg

  # ffmpeg
  
  ffmpeg version 0.8.7-6:0.8.7-1ubuntu2
  
  # which ffmpeg
  
  /usr/bin/ffmpeg

  Log

  # tail log/development.log
  
  Started POST "/default/topics" at 2014-12-02 06:47:58 +0000
  
  Processing by Forem::TopicsController#create as HTML
  
    Parameters: {"utf8"=>"✓", "authenticity_token"=>"8W8wk42e28JOUnUNvPjgfslVNV//aAmj4nxz/8dfqM0=", "topic"=>{"subject"=>"dfhfhdfhdfhdf", "posts_attribute
  
  s"=>{"0"=>{"text"=>"sdfsdfsdfsdf", "photos_attributes"=>{"0"=>{"attachment"=>#RackMultipart20141202-40-hqit2u>, @original_filename="gif.gif", @content_type="image/gif", @headers="Content-Disposition: form-data; name=\"topic[posts
  
  _attributes][0][photos_attributes][0][attachment]\"; filename=\"gif.gif\"\r\nContent-Type: image/gif\r\n">}}}}}, "commit"=>"Create Topic", "forum_id"=>"
  
  default"}
  
    User Load (0.3ms)  SELECT  "users".* FROM "users"  WHERE "users"."id" = 1  ORDER BY "users"."id" ASC LIMIT 1
  
    Forem::Forum Load (0.2ms)  SELECT  "forem_forums".* FROM "forem_forums"  WHERE "forem_forums"."slug" = 'default'  ORDER BY "forem_forums"."name" ASC L
  
  IMIT 1
  
    Forem::Category Load (0.1ms)  SELECT  "forem_categories".* FROM "forem_categories"  WHERE "forem_categories"."id" = ? LIMIT 1  [["id", 1]]
  
  Command :: file -b --mime '/tmp/d38252762d3d4fd229faae637fd13f4e20141202-40-17gal7n.gif'
  
  [paperclip] [ffmpeg] ffprobe "/tmp/d38252762d3d4fd229faae637fd13f4e20141202-40-16dhhg1.gif" 2>&1
  
  [paperclip] [ffmpeg] Command Success
  
  [paperclip] [ffmpeg] Making...
  
  [paperclip] [ffmpeg] Building Destination File: 'd38252762d3d4fd229faae637fd13f4e20141202-40-16dhhg1' + 'flv'
  
  [paperclip] [ffmpeg] Destination File Built
  
  [paperclip] [ffmpeg] Adding Geometry
  
  [paperclip] [ffmpeg] Adding Format
  
  [paperclip] [ffmpeg] Adding Source
  
  [paperclip] [ffmpeg] Building Parameters
  
  [paperclip] [ffmpeg] -i :source -y :dest
  
  Command :: ffmpeg -i '/tmp/d38252762d3d4fd229faae637fd13f4e20141202-40-16dhhg1.gif' -y '/tmp/d38252762d3d4fd229faae637fd13f4e20141202-40-16dhhg120141202
  
  -40-t4mbua.flv'
  
  Command :: file -b --mime '/tmp/d38252762d3d4fd229faae637fd13f4e20141202-40-16dhhg120141202-40-t4mbua.flv'
  
  [paperclip] [ffmpeg] ffprobe "/tmp/d38252762d3d4fd229faae637fd13f4e20141202-40-16dhhg1.gif" 2>&1
  
  [paperclip] [ffmpeg] Command Success
  
  [paperclip] [ffmpeg] Making...
  
  [paperclip] [ffmpeg] Building Destination File: 'd38252762d3d4fd229faae637fd13f4e20141202-40-16dhhg1' + 'png'
  
  [paperclip] [ffmpeg] Destination File Built
  
  [paperclip] [ffmpeg] Adding Geometry
  
  [paperclip] [ffmpeg] Adding Format
  
  [paperclip] [ffmpeg] Adding Source
  
  [paperclip] [ffmpeg] Building Parameters
  
  [paperclip] [ffmpeg] -ss 3 -i :source -vframes 1 -f image2 -y :dest
  
  Command :: ffmpeg -ss 3 -i '/tmp/d38252762d3d4fd229faae637fd13f4e20141202-40-16dhhg1.gif' -vframes 1 -f image2 -y '/tmp/d38252762d3d4fd229faae637fd13f4e
  
  20141202-40-16dhhg120141202-40-1d5qljm.png'
  
     (0.2ms)  begin transaction
  
    Forem::Topic Exists (0.3ms)  SELECT  1 AS one FROM "forem_topics"  WHERE ("forem_topics"."id" IS NOT NULL) AND "forem_topics"."slug" = 'dfhfhdfhdfhdf'
  
   LIMIT 1
  
  Command :: file -b --mime '/tmp/d38252762d3d4fd229faae637fd13f4e20141202-40-zc9uyd.gif'
  
    SQL (0.7ms)  INSERT INTO "forem_topics" ("created_at", "forum_id", "slug", "subject", "updated_at", "user_id") VALUES (?, ?, ?, ?, ?, ?)  [["created_a
  
  t", "2014-12-02 06:47:59.655386"], ["forum_id", 1], ["slug", "dfhfhdfhdfhdf"], ["subject", "dfhfhdfhdfhdf"], ["updated_at", "2014-12-02 06:47:59.655386"
  
  ], ["user_id", 1]]
  
    SQL (0.3ms)  INSERT INTO "forem_posts" ("created_at", "text", "topic_id", "updated_at", "user_id") VALUES (?, ?, ?, ?, ?)  [["created_at", "2014-12-02
  
   06:47:59.658316"], ["text", "sdfsdfsdfsdf"], ["topic_id", 24], ["updated_at", "2014-12-02 06:47:59.658316"], ["user_id", 1]]
  
    Forem::Topic Load (0.1ms)  SELECT  "forem_topics".* FROM "forem_topics"  WHERE "forem_topics"."id" = ? LIMIT 1  [["id", 24]]
  
    SQL (5.9ms)  UPDATE "forem_topics" SET "last_post_at" = '2014-12-02 06:47:59.658316' WHERE "forem_topics"."id" = 24
  
    Forem::Subscription Load (0.1ms)  SELECT  "forem_subscriptions".* FROM "forem_subscriptions"  WHERE "forem_subscriptions"."topic_id" = ?  ORDER BY "fo
  
  rem_subscriptions"."id" ASC LIMIT 1000  [["topic_id", 24]]
  
    SQL (0.1ms)  UPDATE "forem_posts" SET "notified" = 't' WHERE "forem_posts"."id" = 24
  
    SQL (0.1ms)  UPDATE "forem_posts" SET "state" = 'approved' WHERE "forem_posts"."id" = 24
  
  Binary data inserted for `string` type on column `attachment_content_type`
  
    SQL (0.2ms)  INSERT INTO "photos" ("attachment_content_type", "attachment_file_name", "attachment_file_size", "attachment_updated_at", "created_at", "
  
  post_id", "updated_at") VALUES (?, ?, ?, ?, ?, ?, ?)  [["attachment_content_type", "image/gif"], ["attachment_file_name", "gif.gif"], ["attachment_file_
  
  size", 1660134], ["attachment_updated_at", "2014-12-02 06:47:58.645579"], ["created_at", "2014-12-02 06:47:59.676633"], ["post_id", 24], ["updated_at",
  
  "2014-12-02 06:47:59.676633"]]
  
     (0.1ms)  SELECT COUNT(*) FROM "forem_subscriptions"  WHERE "forem_subscriptions"."topic_id" = ? AND "forem_subscriptions"."subscriber_id" = 1  [["top
  
  ic_id", 24]]
  
    SQL (0.1ms)  INSERT INTO "forem_subscriptions" ("subscriber_id", "topic_id") VALUES (?, ?)  [["subscriber_id", 1], ["topic_id", 24]]
  
    SQL (0.2ms)  UPDATE "forem_topics" SET "state" = 'approved' WHERE "forem_topics"."id" = 24
  
     (16.3ms)  commit transaction
  
  Redirected to http://web-fdf7b3ef-c097-41fe-ac7a-1cf06815fcbc.runnable.com/default/topics/dfhfhdfhdfhdf
  
  Completed 302 Found in 1114ms (ActiveRecord: 25.7ms)

• VB.Net Stream Bitmap/Image TO FFMpeg is not working :(

  6 février 2015, par Zakir_SZH

  I m trying to port images to FFMpeg using StandardInput. It’s not working somehow ? :(

  it’s throwing me bellow error :(

  

  Here is the code i tried :

      Dim objBitmap As System.Drawing.Bitmap
  
      Dim objFProcess As System.Diagnostics.Process
  
      Dim objStream As System.IO.BinaryWriter
  
      Dim strFiles() As String
  
      Dim strEachFile As String
  
      Dim intFile As Integer
  
      Dim intFrame As Integer
  
      Dim intFLoop As Integer
  
      objFProcess = New System.Diagnostics.Process
  
      objFProcess.StartInfo.FileName = "c:\ffmpeg.exe"
  
      objFProcess.StartInfo.Arguments = "-r 1 -f image2pipe -i pipe:.bmp -pix_fmt yuv420p -crf 35.0 -vcodec libx264 -an -coder 1 -rc_lookahead 50 -threads 0 D:\test.mp4"
  
      objFProcess.StartInfo.UseShellExecute = False
  
      objFProcess.StartInfo.RedirectStandardInput = True
  
      objFProcess.StartInfo.RedirectStandardOutput = True
  
      objFProcess.StartInfo.RedirectStandardError = True
  
      rem objFProcess.StartInfo.WindowStyle = ProcessWindowStyle.Hidden
  
      rem objFProcess.StartInfo.CreateNoWindow = True
  
      objFProcess.Start()
  
      objStream = New System.IO.BinaryWriter(objFProcess.StandardInput.BaseStream)
  
      strFiles = My.Computer.Clipboard.GetText().Split({System.Environment.NewLine}, StringSplitOptions.None)
  
      intFrame = 0
  
      intFile = 0
  
      For Each strEachFile In strFiles
  
          rem MessageBox.Show(strEachFile)
  
          intFile = intFile + 1
  
          objBitmap = New System.Drawing.Bitmap(strEachFile)
  
          For intFLoop = 0 To 24
  
              intFrame = intFrame + 1
  
              cmd1.Text = intFile.ToString & "-" & intFrame.ToString
  
              My.Application.DoEvents()
  
              objBitmap.Save(objStream.BaseStream, System.Drawing.Imaging.ImageFormat.Bmp) Rem this line give me above (attached) error :(
  
          Next
  
          objBitmap.Dispose()
  
      Next
  
      System.Threading.Thread.Sleep(3000)
  
      objStream.Close()
  
      MessageBox.Show("Done!")
  
      rem objFProcess.Kill()

  any help would be highly appreciated

  thanks in advance...

  Edit-1 :
  As asked by some one :) here is :

  View Detail Result : (Sorry, the image is very large in width/height)

  

  And here is the Copy Details Result :

  System.Runtime.InteropServices.ExternalException was unhandled
  
  ErrorCode=-2147467259
  
  Message=A generic error occurred in GDI+.
  
  Source=System.Drawing
  
  StackTrace:
  
     at System.Drawing.Image.Save(Stream stream, ImageCodecInfo encoder, EncoderParameters encoderParams)
  
     at System.Drawing.Image.Save(Stream stream, ImageFormat format)
  
     at FFMpeg_Stream.Form1.cmd1_Click(Object sender, EventArgs e) in g:\My Documents\FFMpeg Stream\FFMpeg Stream\Form1.vb:line 40
  
     at System.Windows.Forms.Control.OnClick(EventArgs e)
  
     at System.Windows.Forms.Button.OnClick(EventArgs e)
  
     at System.Windows.Forms.Button.WndProc(Message& m)
  
     at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
  
     at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
  
     at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
  
     at System.Windows.Forms.UnsafeNativeMethods.SendMessage(HandleRef hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
  
     at System.Windows.Forms.Control.SendMessage(Int32 msg, IntPtr wparam, IntPtr lparam)
  
     at System.Windows.Forms.Control.ReflectMessageInternal(IntPtr hWnd, Message& m)
  
     at System.Windows.Forms.Control.WmCommand(Message& m)
  
     at System.Windows.Forms.Control.WndProc(Message& m)
  
     at System.Windows.Forms.ScrollableControl.WndProc(Message& m)
  
     at System.Windows.Forms.Form.WndProc(Message& m)
  
     at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
  
     at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
  
     at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
  
     at System.Windows.Forms.UnsafeNativeMethods.CallWindowProc(IntPtr wndProc, IntPtr hWnd, Int32 msg, IntPtr wParam, IntPtr lParam)
  
     at System.Windows.Forms.NativeWindow.DefWndProc(Message& m)
  
     at System.Windows.Forms.Control.DefWndProc(Message& m)
  
     at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
  
     at System.Windows.Forms.Control.WndProc(Message& m)
  
     at System.Windows.Forms.ButtonBase.WndProc(Message& m)
  
     at System.Windows.Forms.Button.WndProc(Message& m)
  
     at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
  
     at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
  
     at System.Windows.Forms.NativeWindow.DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)
  
     at System.Windows.Forms.UnsafeNativeMethods.DispatchMessageW(MSG& msg)
  
     at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager.FPushMessageLoop(IntPtr dwComponentID, Int32 reason, Int32 pvLoopData)
  
     at System.Windows.Forms.Application.ThreadContext.RunMessageLoopInner(Int32 reason, ApplicationContext context)
  
     at System.Windows.Forms.Application.ThreadContext.RunMessageLoop(Int32 reason, ApplicationContext context)
  
     at System.Windows.Forms.Application.Run(ApplicationContext context)
  
     at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.OnRun()
  
     at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.DoApplicationModel()
  
     at Microsoft.VisualBasic.ApplicationServices.WindowsFormsApplicationBase.Run(String[] commandLine)
  
     at FFMpeg_Stream.My.MyApplication.Main(String[] Args) in 17d14f5c-a337-4978-8281-53493378c1071.vb:line 81
  
     at System.AppDomain._nExecuteAssembly(RuntimeAssembly assembly, String[] args)
  
     at System.AppDomain.ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)
  
     at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()
  
     at System.Threading.ThreadHelper.ThreadStart_Context(Object state)
  
     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state, Boolean ignoreSyncCtx)
  
     at System.Threading.ExecutionContext.Run(ExecutionContext executionContext, ContextCallback callback, Object state)
  
     at System.Threading.ThreadHelper.ThreadStart()
  
  InnerException:

  that’s all i can give as information :(

• bash script to install / update ffmpeg static builds

  1er mars 2017, par Joakim

  Hi I’m trying to make my first "real" bash script to do some real work than can be executed both manually and through cron jobs.

  The script should download and install the ffmpeg-static-build from https://johnvansickle.com/ffmpeg

  Here is what I’ve got so far :

  #!/bin/bash
  
  # Still to come, see if the script runs with root privileges else exit
  
  #Download FFMPEG static daily build and it's md5
  
  cd ~
  
  wget https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz | tar -xf
  
  #wget https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5
  
  curl -L https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5 | tar -xf | tee -a https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz | cut -d\  -f1 | md5sum > md5sum.txt
  
  
  
  
  
  #Chech the md5 is currect
  
  #md5sum -c MD5SUMS
  
  file1="md5sum.txt"
  
  file2="ffmpeg-git-64bit-static.tar.xz.md5"
  
  
  
  if ! cmp --silent "$file1" "$file2"; then
  
      echo "md5sum doesn't match...\n exit" >&2
  
      exit 1
  
  fi
  
  
  
  
  
  #tar -xf ffmpeg-*.tar.xz
  
  cp ffmpeg-*-static/ff* /usr/bin/
  
  cp ffmpeg-*-static/ff* /usr/local/bin/
  
  cp ffmpeg-*-static/qt-faststart /usr/bin/
  
  cp ffmpeg-*-static/qt-faststart /usr/local/bin/
  
  # Consider change second location to use ln -s
  
  # Remove downloads and do some clean up
  
  
  
  rm -fr ffmpeg-*
  
  
  
  #EOF

  As you can see in the script i would like to add the md5sum check but it fails (got the md5sum check part from Compare md5 sums in bash script)

  If i remove the md5sum part the script is working, but right now the script fails at the | tar -xf | part with this code

  2017-02-28 00:10:24 (617 KB/s) - ‘ffmpeg-git-64bit-static.tar.xz’ saved [17564756/17564756]
  
  
  
  tar: option requires an argument -- 'f'
  
  Try 'tar --help' or 'tar --usage' for more information.
  
  tee: 'https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz': No such file or directory
  
    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
  
                                   Dload  Upload   Total   Spent    Left  Speed
  
  100    65  100    65    0     0     87      0 --:--:-- --:--:-- --:--:--    87
  
  (23) Failed writing body
  
  md5sum doesn't match...
  
   exit

  As this is my first, I would appreciate any "I’m 4 years old" advices and why

  update

  Have made some changes to the script based on the suggestions in this thread, but my problem is I have no output what so ever at this state :( So I think it’s time to ask for the next clue

  #!/bin/bash
  
  
  
  # version 0.3z
  
  
  
  ## Download FFMPEG static daily build and it's md5
  
  ## 
  
  ## To make this script working you might need to change the below values
  
  ## based on whether you are using a 32bit or 64 bit OS
  
  ## to obtain the right links you have to have a look @ https://johnvansickle.com/ffmpeg/
  
  ## and then change those below
  
  ## 
  
  ## If you are running on a shared server or dowsn't have root priviliges you might need to uncomment
  
  ## point 5.
  
  
  
  
  
  # a "~" means running users home folder :) and should be different from destination dir
  
  download_dir=~
  
  
  
  # as this can change if the ffmpeg is to be stored on ex. shared server
  
  dest_dir=/usr/bin/
  
  
  
  # The version it equal the filename from above link
  
  version=ffmpeg-git-64bit-static.tar.xz
  
  
  
  ## Do not change anything below here!!
  
  source_url=https://johnvansickle.com/ffmpeg/builds/${version}
  
  md5_url=https://johnvansickle.com/ffmpeg/builds/${version}.md5
  
  
  
  # Still to come, see if the script runs with write privileges else exit
  
  
  
  # 1. Can we enter download directory else exit
  
  cd ${download_dir} ||
  
  
  
          printf "%s\n" "You can't enter this folder.\nPlease chage download_dir in this script..." >&2
  
          exit 1
  
  
  
  # 2. Check the md5 is correct or have changed from last check
  
  ## instead of downloading ffmpeg-git-64bit-static.tar.xz every time,
  
  ## regardless if it is new or not, I recommend only downloading it
  
  ## if the md5 does not match. Would save John some bandwidth at least
  
  ## thx for the idea to @LordNeckbeard
  
  
  
  
  
  
  
  ## So somehow i'll guess some sed or grep only first part is nessesary :(
  
  ## This is getting more advance than expected for a first time script :/
  
  
  
  if ! diff <(md5sum ${version}) <(curl -s ${md5_url})
  
  
  
      then
  
          printf "%s\n" "md5sum doesn't match...\n
  
                          Downloading new version" >&2
  
          rm -f ${version} >&2
  
          curl ${source_url} -o ${download_dir}/${version} >&2
  
          #exit 2
  
  
  
      elif
  
          diff <(md5sum ${version}) <(curl -s ${md5_url})
  
          printf "%s\n" "Nothing new to download" >&2
  
        exit 3
  
  fi
  
  
  
  # 3. untar
  
  tar -xf ffmpeg-git-*-static.tar.xz
  
  
  
  # 4. Move builds to destination directories
  
  
  
  mv ${download_dir}/ffmpeg-*-static/ff* ${dest_dir}/
  
  mv ${download_dir}/ffmpeg-*-static/qt-faststart ${dest_dir}/
  
  
  
  # 5. Make soft links to static builds
  
  ln -sfn ${dest_dir}/qt-faststart /usr/local/bin/qt-faststart
  
  ln -sfn ${dest_dir}/ffmpeg /usr/local/bin/ffmpeg
  
  ln -sfn ${dest_dir}/ffmpeg-10bit /usr/local/bin/ffmpeg-10bit
  
  ln -sfn ${dest_dir}/ffprobe /usr/local/bin/ffprobe
  
  ln -sfn ${dest_dir}/ffserver /usr/local/bin/ffserver
  
  
  
  # Remove unzipped folder to do some clean up
  
  
  
  rm -fr ffmpeg-git-*-static/
  
  
  
  #EOF

  note : do to some more in depth answering of why not compile from source :
  1. This precompiled is usable on all Linux variations, despite distro and version
  2. It usable on shared hosting servers with ssh access

  UPDATE 2

      #!/bin/bash
  
  
  
  # version 0.4z
  
  
  
  ## Download FFMPEG static daily build and it's md5
  
  ## 
  
  ## To make this script working you might need to change the below values
  
  ## based on whether you are using a 32bit or 64 bit OS
  
  ## to obtain the right links you have to have a look @ https://johnvansickle.com/ffmpeg/
  
  ## and then change those below
  
  ## 
  
  ## Finished and working script should be distributed under GPLv3: free as in freedom
  
  ## 
  
  ## If you are running on a shared server or dowsn't have root priviliges you might need to uncomment
  
  ## point 5.
  
  
  
  
  
  # a "~" means running users home folder :) and should be different from destination dir
  
  download_dir=~
  
  
  
  # as this can change if the ffmpeg is to be stored on ex. shared server
  
  dest_dir=/usr/bin/
  
  
  
  # The version it equal the filename from above link
  
  version=ffmpeg-git-64bit-static.tar.xz
  
  
  
  ## Do not change anything below here!!
  
  source_url=https://johnvansickle.com/ffmpeg/builds/${version}
  
  md5="curl -s https://johnvansickle.com/ffmpeg/builds/${version}.md5"
  
  
  
  # Still to come, see if the script runs with write privileges else exit
  
  
  
  # 1. Can we enter download directory else exit
  
  cd ${download_dir} || 
  
          printf "%s\n" "You can't enter this folder.\nPlease chage download_dir in this script..." >&2
  
          exit 1
  
  
  
  # 2. Check the md5 is correct or have changed from last check
  
  ## instead of downloading ffmpeg-git-64bit-static.tar.xz every time,
  
  ## regardless if it is new or not, I recommend only downloading it
  
  ## if the md5 does not match. Would save John some bandwidth at least
  
  ## thx for the idea to @LordNeckbeard
  
  
  
  ## This is getting more advance than expected for a first time script :/
  
  
  
  if diff <(md5sum ${version}) <(${md5})
  
  
  
      then
  
          printf "%s\n" "No new version availeble" >&2
  
          exit 1
  
  
  
  elif ! diff <(md5sum ${version}) <(${md5})
  
      then
  
          rm -f ${version}
  
          curl ${source_url} > ${version}
  
          exit 0
  
  
  
          #only proceed if downloaded version match it's md5
  
          if ! diff <(md5sum ${version}) <(${md5})
  
              then
  
              rm -f ${version}
  
              printf "%s\n" "Downloaded version is damaged, try later\ndamaged version have been deleted" >&2
  
              exit 1
  
          fi
  
  
  
              # 3. untar
  
              tar -xf ffmpeg-git-*-static.tar.xz
  
  
  
              # 4. Move builds to destination directories
  
              mv ${download_dir}/ffmpeg-*-static/ff* ${dest_dir}/
  
              mv ${download_dir}/ffmpeg-*-static/qt-faststart ${dest_dir}/
  
  
  
              # 5. Make soft links to static builds
  
              ln -sfn ${dest_dir}/qt-faststart /usr/local/bin/qt-faststart
  
              ln -sfn ${dest_dir}/ffmpeg /usr/local/bin/ffmpeg
  
              ln -sfn ${dest_dir}/ffmpeg-10bit /usr/local/bin/ffmpeg-10bit
  
              ln -sfn ${dest_dir}/ffprobe /usr/local/bin/ffprobe
  
              ln -sfn ${dest_dir}/ffserver /usr/local/bin/ffserver
  
  
  
              # Remove unzipped folder to do some clean up
  
              rm -fr ffmpeg-git-*-static/
  
              printf "%s\n" "Going to install new version" >&2
  
              exit 1
  
  fi
  
  #EOF

  But still having some issues :(

  1. Running this script returns : a blanc shell, but I’ve expected one of the printf statements
  2. When I’m trying to narrow down the problem and going back to basic and trying to run the script with only the "if" part it fails with 44 : Syntax error : "(" unexpected

  3. running the very same "if" part typed directly into the shell/terminal itself it’s all happy !!
     if diff <(md5sum ffmpeg-git-64bit-static.tar.xz) <(curl -s "https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5"); then printf "%s\n" "No new version availeble" >&2; elif ! diff <(md5sum ffmpeg-git-64bit-static.tar.xz) <(curl -s "https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz.md5"); then rm -f ffmpeg-git-64bit-static.tar.xz; curl https://johnvansickle.com/ffmpeg/builds/ffmpeg-git-64bit-static.tar.xz > ffmpeg-git-64bit-static.tar.xz; printf "%s\n" "Going to install new version" >&2; fi

  4. I’m confused