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content/posts/goodnight-video.md

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+date: 2013-03-04 12:31:36
+title: Goodnight video
+category: English
+tags: Music, Video, Kdenlive, slowmoVideo, Omashay, AWS, Amazon, cloud computing, EC2, ImageMagick, Twixtor, Ubuntu, Kubuntu
+
+A new video has been released by [Omashay](http://omashay.com). Here is Goodnight, on which I did the slow-motion:
+
+http://www.youtube.com/watch?v=bAKmRTV7Lek
+
+The video is [based on a series of 70 sketches](http://omashay.com/2013/02/22/goodnight-the-video/) Tomasito's made for a college project:
+
+![](/static/uploads/2013/02/goodnight-drawings-keyframes.jpg)
+
+He wanted to explore the possibilities of reusing them for a music video. I had the perfect secret weapon for this kind of job: [slowmoVideo](http://slowmovideo.granjow.net/), an open-source clone of [Twixtor](http://www.revisionfx.com/products/twixtor/).
+
+In fact I tried to use that software 14 months ago, but never went as far as producing something. First I realized I had no <a target="_blank" href="http://www.amazon.com/s/?_encoding=UTF8&camp=1789&creative=390957&field-keywords=nVidia%20GPU&linkCode=ur2&tag=kevideld-20&url=search-alias%3Daps">nVidia GPU</a><img src="https://www.assoc-amazon.com/e/ir?t=kevideld-20&l=ur2&o=1" width="1" height="1" border="0" alt="" style="border:none !important; margin:0px !important;" /> at hand. So I rented a *GPU Quadruple Extra Large* EC2 instance (`cg1.4xlarge`) from Amazon's cloud. It cost me $4.70 (without VAT) for 3 hours. But I failed to compiles slowmoVideo.
+
+I forgot about it until recently, when I learned it no longer required a GPU to compute the optical flow. And last month I found a way to [compile slowmoVideo on Ubuntu 12.10](http://kevin.deldycke.com/2013/02/slowmo-video-ubuntu-12-10/).
+
+Now it's time to prepare my keyframes. I batch-resized all original drawings to 1080p with a white background. This was done in one command line thanks to <a target="_blank" href="http://www.amazon.com/s/?_encoding=UTF8&camp=1789&creative=390957&field-keywords=ImageMagick&linkCode=ur2&rh=i%3Aaps%2Ck%3AImageMagick&tag=kevideld-20&url=search-alias%3Daps">ImageMagick</a><img src="https://www.assoc-amazon.com/e/ir?t=kevideld-20&l=ur2&o=1" width="1" height="1" border="0" alt="" style="border:none !important; margin:0px !important;" />:
+
+    :::bash
+    $ convert -resize 1920x1080 -background white -gravity center -extent 1920x1080 ./keyframes/* pict%04d.png
+
+Then I applied a paper texture to add some grain:
+
+    :::bash
+    $ find ./ -iname "pict*.png" -exec composite -gravity center -compose Multiply ./paper-texture.png "{}" "{}"-texturized.png \;
+
+The series of images were imported in slowmoVideo, and I created a 4 minutes linear ultra-slowmotion with the default parameters.
+
+Finally, the raw rendering was assembled in Kdenlive with [Goodnight's audio track](http://omashay.bandcamp.com/track/goodnight) and title cards to produce the result that is now [available on YouTube](http://www.youtube.com/watch?v=bAKmRTV7Lek).

content/templates/videos.html

@@ -18,7 +18,7 @@ <h1>
     , 'thumb': "/static/uploads/2013/02/goodnight-preview.jpg"
     , 'roles': ["Music video"]
     , 'tools': ["2013"]
-    , 'links': ["http://www.youtube.com/watch?v=bAKmRTV7Lek"]
+    , 'links': ["http://www.youtube.com/watch?v=bAKmRTV7Lek", "http://kevin.deldycke.com/2013/03/goodnight-video/"]
     },
     { 'name':  "The making of <em>Where is she ?</em>"
     , 'desc':  ""