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• Create a progresa bar in rails while converting a file with ffmpeg

  15 avril 2017, par Raxor

  How i can create a progress bar in my view that update with ffmpeg while is converting from a video file mkv to webm

  Im using the gem ’paperclip’ and ’paperclip-av-transcoder’

  The file is uploaded fine but i need to show to the user something that tell him how long he has to wait

  postController.rb

  def create
  
  
  
   @article = current_user.articles.create(params_article)
  
  
  
   if @article.valid?
  
      @article.save
  
      if !@article.video_file_name.nil?
  
          @article.change_name_video
  
          @article.save
  
          @article.destroy_video_original
  
          respond_to do |format|
  
              format.js {render :create}
  
          end
  
      end
  
   else
  
      render :new
  
   end
  
  end
  
  
  
    def params_article
  
      params.require(:article).permit(:title, :body, :cover, :video)
  
    end

  form

      =simple_form_for @article ,html:{ :"data-type" => "js", id: "form"}, :remote => true do |f|
  
          .progress-wrapper
  
              .progress
  
                  .progress-bar{role: "progressbar"}
  
                      0%
  
          = f.input :video
  
          = f.input :cover 
  
          =f.input  :title
  
          =f.input  :body 
  
          =f.button  :submit

• Revision 52af8e3ee6 : flv.h, flvmeta.c, flvdump.c : Added support for Screen Video V2, and On2 VP6 with

  20 septembre 2007, par Marc Noirot

  Changed Paths :
   Modify /AUTHORS

  
   Modify /ChangeLog

  
   Modify /Makefile.am

  
   Modify /README

  
   Add /THANKS
  (from /AUTHORS
  :7eef48a76c31888eb3e6267fb8c200419059f1dd)
   Add /TODO

  
   Modify /flv.h

  
   Modify /flvdump.c

  
   Modify /flvmeta.c

  
  
  flv.h, flvmeta.c, flvdump.c : Added support for Screen Video V2, and On2 VP6 with
  alpha channel.
  flvdump.c (compute_metadata) : Fixed a compilation issue on MacOSX caused by a
  misplaced minus sign.
  flvmeta.c (main) : Added protection against giving the same file as input and
  output.
  flv.h, flvmeta.c : Fixed the padding in the flv_tag to better reflect its role.
  flvmeta.c : Made error messages more uniform.
  flvmeta.c (compute_h263_size) : Added Picture Start Code check.
  flvdump.c (main) : Suppressed a compilation warning.
  Makefile.am : Added -Wall.
  Makefile.am : Removed non-existant directory `doc' from EXTRA_DIST.
  Added THANKS, TODO standard files.
  AUTHORS, README, Changelog : Standard stuff.

• C# Using NReco FFMpegConverter to take live video screenshots

  21 novembre 2014, par Lance Bloom

  I have an an application running as an Azure Web Role where I want to take screenshots of live RTSP video streams on a Wowza server. I am using the NReco FFMpegConverter wrapper. I am having issues with consistency. Sometimes the code doesn’t execute at all, sometimes it executes right away, sometimes it take 2-3 minutes for the screenshot to be created. I’ve tested this on static (not live) mp4 videos and everything is executed flawlessly (within 1-2 seconds).

  Stream thumb1 = new System.IO.MemoryStream();
  
  
  
  var ffMpeg = new NReco.VideoConverter.FFMpegConverter();                
  
  ffMpeg.GetVideoThumbnail("rtsp://99.99.99.99:1935/streamurl", thumb1);
  
  
  
  //Code to upload file to blob storage
  
  blob = testContainer.GetBlockBlobReference("test.jpg");
  
  
  
  thumb1.Seek(0, SeekOrigin.Begin);
  
  blob.Properties.ContentType = "image/jpg";
  
  blob.UploadFromStream(s);

  The error I get during failed execution is "Output file #0 does not contain any stream". I am really curious why it takes 2-3 minutes to get an output screenshot sometimes, while other times only a few seconds. Looking for any advice on how to improve this approach and still use the C# NReco wrapper.

  Thanks !