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• Revision 84e62427eb0dbdf3692f746d4848770f6be6b76f : liens_implicite.. au lieu de lien_implicite..., et on evacue le site qui ...

  25 septembre 2010, par Cerdic — Log

  liens_implicite.. au lieu de lien_implicite..., et on evacue le site qui part dans l’extension correspondante git-svn-id : svn ://trac.rezo.net/spip/spip@16308 caf5f3e8-d4fe-0310-bb3e-c32d5e47d55d

• Rails preview for active storage videos not working

  17 mai 2022, par Freebian

  I have a pretty standard model where you can upload videos - so far so good.
The video gets uploaded and is also displayed on the show view. Alle seems to be fine....but :

  


  I cannot get a preview fo to work.

  


  ActiveStorage::Blob.last.previewable?
--> false


  


  ActiveStorage::Blob.video?
--> true


  


  FFMPEG is installed on the system and in the gem file

  


  which ffmpeg   
--> /usr/local/bin/ffmpeg

gem 'streamio-ffmpeg'



  


  And of course if I run preview directly, I get an error

  


  ActiveStorage::Blob.last.preview(resize: "200x200>").processed
--> ActiveStorage::UnpreviewableError (ActiveStorage::UnpreviewableError)



  


  Previewers is having video included

  


  Rails.application.config.active_storage.previewers
--> [ActiveStorage::Previewer::PopplerPDFPreviewer, ActiveStorage::Previewer::MuPDFPreviewer, ActiveStorage::Previewer::VideoPreviewer]



  


  I also tried different video formats, but nothing works and I am out of ideas where to look.
Anybody had the same issue ?

  


• Getting video metadata in ruby script using ffmpeg, ffprobe or rvideo

  24 janvier 2013, par alex

  I want to get metadata of videos referenced by a URL using Ruby. At this point, I found many related posts, but could not find out how to solve my problem.

  I tried to use RVideo, but when I do :

  file = RVideo::Inspector.new(:file => 'http://www.agreatsite.com/avideo.mp4' ;)

  It throws

  'ArgumentError : File not found (http://www.agreatsite.com/avideo.mp4)...

  So I can't get the information using RVideo (but it works well when I have the file hosted on my local computer).

  I then tried to use ffprobe, but I don't know how to read the output.
  So far, I have the following method, which "shows" the information I want when I run it in the console, but it actually returns "true" and I can't find out how to capture the output I need...

    def media_info
  
      source = self
  
      command = <<-end_command
  
        ffprobe -v quiet -print_format json -show_format -show_streams  #{source}
  
      end_command
  
      command.gsub!(/\s+/, " ")
  
      system(command)
  
    end

  Would love some help, to make this work with either ffprobe or RVideo !

  UPDATE :
  I found a way to get what I needed. Not sure this is the best way to do it :

  def get_media_duration

  source = self.media[0][:url]    
  
  
  
  command = <<-end_command
  
    ffprobe -v quiet  -show_streams  #{source}
  
  end_command
  
  command.gsub!(/\s+/, " ")
  
  
  
  duration = ""
  
  IO.popen(command) { |io| while (line = io.gets) do
  
                          puts "++ "+line.inspect
  
                          duration = line.split("duration=")[1].gsub("\n", "") if line.split("duration=").length > 1
  
                        end
  
                    }
  
  duration   

  end

  I guess I could make it work that way, but doesn't seem very elegant to me. Better suggestions would be greatly appreciated !