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• Extract frames from a large video c#

  21 janvier 2014, par las

  I am developing a video editing software.
  For that I need to first load a video for editing.
  After loading the video I need to create a timeline of the video with its Thumbnail images which should take in every one seconds.

  I have tried many options for that but still have an issue with more 10 - 15 mins videos.

  First I used ffmpeg.
  There I tired two options.They ended up with following results
   One is very slow
   Another one is fast but thumbnails are not accurate

  Next I used Aforge.Net
   There I can save images to disk but cannot access after 2000-3000 thumbnails
  (It gives out of memory exception)

  Please if you have good suggestion let me know for this task.
  Any one like to see my tried code samples let me know , I will add it to this question.

  Following is the method for reading images which are in the Disk

    void AddThumbnailImages(int i)
  
    {
  
  
  
       PictureBox pictureBox = new PictureBox();
  
       pictureBox.Size = new System.Drawing.Size(100, 75);
  
  
  
        pictureBox.Image = (Bitmap)new Bitmap("Snaps\\" + i + ".jpeg").Clone();
  
  
  
          if (i == totalFrames)
  
        { pictureBox.Tag = totalTimeForFrames; }
  
        else { pictureBox.Tag = (i / frameRate); }
  
        pictureBox.MouseClick += new MouseEventHandler(ViewImageTag);
  
        pictureBox.MouseDoubleClick += new MouseEventHandler(videoCuting);
  
        pictureBox.MouseHover += new EventHandler(pictureBox_MouseHover);
  
        pictureBox.SizeMode = PictureBoxSizeMode.Zoom;
  
        pictureBox.BringToFront();
  
  
  
       pictureBox.Location = new Point(pictureBoxlocationX + (100 * (i/frameRate)),         pictureBoxlocationY);
  
       panelTimeline.Controls.Add(pictureBox);
  
  
  
     }

• Way to bypass video upload when testing using Rspec

  1er mars 2014, par Justin

  I'm testing a page on my app that shows videos. I'm trying to speed up the test by bypassing the video upload process or another way ??

  Maybe I'm using FactoryGirl incorrectly for file uploads..

  Using FactoryGirl, I'm creating the video with

  FactoryGirl.define do
  
   factory :video do
  
    user_id 1
  
    type "Live"
  
    title "FooBar"
  
    description "Foo bar is the description"
  
    video { fixture_file_upload(Rails.root.join('spec', 'files', 'concert.mov'), 'video/mp4') }
  
   end
  
  end

  And in the request's spec I'm describing the videos as :

  describe "videos page" do
  
  
  
    let(:user) { FactoryGirl.create(:user) }
  
    let!(:video1) { FactoryGirl.create(:video) }
  
  
  
    before { visit user_video_path(user) }
  
  
  
    it { should have_title(user.name) }
  
    it { should have_content(user.name) }
  
  
  
    describe "videos" do
  
      it { should have_content(video1.description) }
  
    end
  
  end

  Now, everytime I run the test for this page it goes through the file upload process which takes more time. I'm also using FFmpeg

  **video.rb (video model)**
  
  
  
  validates :video, presence: true
  
  has_attached_file :video, :styles => {
  
                                        :medium => { :geometry => "640x480", :format => 'mp4' },
  
                                        :thumb => { :geometry => "470x290#", :format => 'jpg', :time => 10 }
  
                                       }, 
  
                            :processors => [:ffmpeg]

  What this does when I test the page is the CLI goes through the video upload process like it would if you were uploading the video and watching your local server.

• FFMPEG install on server

  23 juillet 2013, par s19k15

  I have an online server (shared hosting plan) in linux, i do not know a lot stuff about linux and i am trying to install ffmpeg.

  I have tryied a lot of scripts but no luck.
  Now i am trying to install the below script via putty.
  <a href="https://github.com/heidisoft/FFMPEG-install-script-for-shared-host" rel="nofollow">https://github.com/heidisoft/FFMPEG-install-script-for-shared-host</a>

  When the install was running i get this message and the installation stops...

  Installation of MPlayer-1.0rc1.tar.bz2 ....... started
  
    % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
  
                                   Dload  Upload   Total   Spent    Left  Speed
  
  100  1233  100  1233    0     0   7713      0 --:--:-- --:--:-- --:--:--  7803
  
  bzip2: (stdin) is not a bzip2 file.
  
  tar: Child returned status 2
  
  tar: Error is not recoverable: exiting now
  
  mplayer.sh: line 32: cd: MPlayer-1.0rc1/: No such file or directory
  
  mplayer.sh: line 33: ./configure: No such file or directory
  
  make: *** No targets specified and no makefile found.  Stop.
  
  make: *** No rule to make target `install'.  Stop.
  
  cp: cannot stat `etc/codecs.conf': No such file or directory
  
  Installation of MPlayer-1.0rc1.tar.bz2 ....... Completed
  
  
  
          Mplayer installation Failed :( , please visit the forum

  What can i do to install ??? Thanks !