2019-03-03 11:33:18 +01:00
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<title>Einführung in Linux</title>
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<meta name="description" content="YALC - Yet Another Linux Course ">
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<meta name="author" content="Daniel Schubert">
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.reveal img{ max-height: 60vh}
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</style>
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</head>
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<body>
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<div class="reveal">
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<!-- Any section element inside of this container is displayed as a slide -->
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<div class="slides">
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<section data-transition="slide" data-background="#4d7e65" data-background-transition="zoom">
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<h1>LINUX</h1>
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<h3>Das universelle Betriebssystem</h3>
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<p>Eine Einführung - Teil 16
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<p> <small>Deutsche Angestellten Akademie</small> </p>
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<aside class="notes">
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Frage: Fragen zur letzten Stunde?
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</aside>
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</section>
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<section data-transition="slide" data-background="#b5533c" data-background-transition="convex" ><h3 >Linux und Multimedia</h3></section>
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<section data-transition="slide" data-background="img/trianglify.svg" data-background-transition="convex"> <h3 style="color: lightgrey; text-shadow: 1px 1px black">Bildbearbeitung</h3></section>
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<section>
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<h5>the Gimp</h5>
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<p>GNU Image Manipulation Programm</p>
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<img src="img/2019-03-02-124423_1366x768_scrot.png">
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</section>
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<section>
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<h5>Darktable</h5>
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<img src="img/2019-03-02-124938_1366x768_scrot.png">
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</section>
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<section>
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<h5>Inkscape</h5>
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<p>Vektorbilder </p>
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<img src="img/2019-03-02-125227_1366x768_scrot.png">
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</section>
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<section>
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2019-03-04 13:24:35 +01:00
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<p><a href="https://imagemagick.org/index.php" target="_blank">ImageMagick</a>
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<pre><code> sudo apt install imagemagick</code></pre>
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2019-03-03 11:33:18 +01:00
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<ul>
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<li>convert / mogrify
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</ul>
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2019-03-04 13:24:35 +01:00
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<pre><code class="bash">convert bild.jpg out.gif </code></pre>
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<ul>
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<li>montage</li>
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</ul>
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<pre><code>montage *.jpg out.jpg</code></pre>
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<ul>
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<li>import</li>
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</ul>
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<pre><code>import screen.jpg</code></pre>
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</section>
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<section>
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<pre><code class="bash" contenteditable>
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2019-03-03 11:33:18 +01:00
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# komprimiert ein jpg ohne sichtbare Qualitätsverluste
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# ( zb für Webseiten Deployment )
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convert -strip -interlace Plane -sampling-factor 4:2:0 \
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-quality 85% quelle.jpg result.jpg
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# das selbe, aber rekursiv und destruktiv
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find . -name "*.jpg" -exec mogrify -strip -interlace Plane \
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-sampling-factor 4:2:0 -quality 85% {} \;
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# Bild beschneiden und zentrieren
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convert input.jpg -crop '1900x1400+0+0'\
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-gravity Center output.jpg
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2019-03-04 13:24:35 +01:00
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</code></pre>
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2019-03-03 11:33:18 +01:00
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</section>
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<section>
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<pre style="width: 80vw; font-size: .5em"><code class="bash">convert -size 320x90 canvas:none -stroke snow4 -size 1x90 -tile gradient:white-snow4 \
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-draw 'roundrectangle 16, 5, 304, 85 20,40' +tile -fill snow \
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-draw 'roundrectangle 264, 5, 304, 85 20,40' -tile gradient:chartreuse-green \
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-draw 'roundrectangle 16, 5, 180, 85 20,40' -tile gradient:chartreuse1-chartreuse3 \
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-draw 'roundrectangle 140, 5, 180, 85 20,40' +tile -fill none \
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-draw 'roundrectangle 264, 5, 304, 85 20,40' -strokewidth 2 \
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-draw 'roundrectangle 16, 5, 304, 85 20,40' \( +clone -background snow4 \
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-shadow 80x3+3+3 \) +swap -background none -layers merge \( +size -pointsize 90 \
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-strokewidth 1 -fill red label:'50 %' -trim +repage \( +clone -background firebrick3 \
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-shadow 80x3+3+3 \) +swap -background none -layers merge \) -insert 0 -gravity center \
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-append -background white -gravity center -extent 320x200 cylinder_shaded.png</code></pre>
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</section>
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<section>Ein Bild verschlüsseln
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<pre><code class="bash">convert rose.jpg -encipher passphrase.txt rose.png</code></pre>
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<pre><code class="bash"># ein anders Bild als Passwort
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convert rose.jpg -encipher smiley.gif rose.png</code></pre>
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<pre><code class="bash"># entschlüsseln
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convert rose.png -decipher smiley.gif rose.jpg</code></pre>
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<a href="https://imagemagick.org/Usage/transform/#encipher">ImageMagick Hilfe Seite</a>
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</section>
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<section>
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<span style="color: orange">Aufgabe:</span>
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<ul>
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<li>Bereitet <a href="https://www.schubertdaniel.de/linuxkurs/bilder.zip">diese Bilder</a> vor für eine Bildergallerie. </li>
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<li>Die Bilder sollen nicht grösser als 1200x800px sein.</li>
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<li>Die Bilder sollen nicht beschnitten werden.</li>
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<li>Die Metadaten sollen entfernt werden.</li>
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<li>Veröffentlicht die Bilder in einer Gallerie auf eurer Wordpress Seite.</li>
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</ul>
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2019-03-04 13:24:35 +01:00
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Hinweis:
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<pre><code>convert input.jpg -resize '1200x800' output.jpg</code></pre>
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2019-03-03 11:33:18 +01:00
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</section>
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<section>
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screenshots mit scrot
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<pre><code class="bash">~$ scrot -d 5 '%Y-%m-%d_$wx$h.png'</code></pre>
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</section>
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<section data-transition="slide" data-background="img/trianglify.svg" data-background-transition="convex"> <h3 style="color: lightgrey; text-shadow: 1px 1px black">Video Editing / Transkodierung</h3></section>
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<section>
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<h4>Einfacher Videoschnitt</h4>
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<ul>
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2019-03-04 13:24:35 +01:00
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<li class="fragment">OpenShot
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<div><img src="img/openshot-screen.jpg"></div></li>
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2019-03-03 11:33:18 +01:00
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<li class="fragment">Pitivi</li>
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<li class="fragment">KDEnlive</li>
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</ul>
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2019-03-04 13:24:35 +01:00
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</section>
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<section>
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2019-03-03 11:33:18 +01:00
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<h4 class="fragment">Anspruchsvoller Videoschnitt</h4>
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<ul>
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2019-03-04 13:24:35 +01:00
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<li class="fragment">Blender - eigentl. 3D-Rendering <ul><li><a href="https://www.youtube.com/watch?v=YE7VzlLtp-4">Big Buck Bunny bei YouTube</a></li>
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<li><a href="https://www.blenderguru.com/articles/27-inspiring-blender-animations-that-will-make-your-jaw-drop">Blender Videos</a></li></ul>
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2019-03-03 11:33:18 +01:00
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<li class="fragment">Lightworks</li>
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</ul>
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</section>
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2019-03-04 13:24:35 +01:00
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<section>
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<h3>Ausflug</h3>
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Video Container
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</section>
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<section>
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Ein Video Container beinhält
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<ul>
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<li class="fragment ">Eine Videospur</li>
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<li class="fragment ">eine oder mehrere Audiospuren</li>
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<li class="fragment ">Untertitel</li>
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</ul>
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</section>
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<section>
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Die Videospur ist meist kodiert mit
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<ul>
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<li class="fragment ">mpeg-1</li>
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<li class="fragment ">mpeg-4</li>
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<li class="fragment ">mpeg4-part10: h264 / h265</li>
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<li class="fragment ">vp8 / vp9 </li>
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<li class="fragment ">theora</li>
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</ul>
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</section>
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<section>
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Die Audiospur ist meist kodiert mit
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<p>
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<ul>
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<li class="fragment ">mp3</li>
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<li class="fragment ">aac</li>
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<li class="fragment ">ogg vorbis</li>
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<li class="fragment ">opus</li>
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</ul>
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</section>
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<section>
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Zusammengesetzt ergeben sich Container
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<ul>
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<li class="fragment ">mp4 : h264 + mp3 ( <a href="https://de.wikipedia.org/wiki/MP4">Wikipedia</a> )</li>
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<li class="fragment ">webm : vp9 + opus ( <a href="https://de.wikipedia.org/wiki/WebM">Wikipedia</a> )</li>
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<li class="fragment ">ogv : theora + ogg ( <a href="https://de.wikipedia.org/wiki/Ogg">Wikipedia</a> )</li>
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<li class="fragment ">mehr <a href="https://de.wikipedia.org/wiki/Containerformat">Wikipedia</a></li>
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</ul>
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</section>
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2019-03-03 11:33:18 +01:00
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<section>
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<h4>ffmpeg</h4>
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<h5>Das Schweizer Taschenmesser der Audio / Video Konvertierung</h5>
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<pre><code class="bash"># einfache Transkodierung
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ffmpeg -i videoi.avi video.mpg
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# DVD Rip
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ffmpeg -i snatch_1.vob -f avi -c:v mpeg4 -b:v 800k \
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-g 300 -bf 2 -c:a libmp3lame -b:a 128k snatch.mpg
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# h264 kodiertes mp4 zur Darstellung im Browser
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ffmpeg -i infile.avi -vf scale=1200:800 -b:v 600k \
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-b:a 128k -c:v libx264 -preset medium outfile.mp4
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# mp3 aus wav
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ffmpeg -i infile.wav -b:a 192k outfile.mp3
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2019-03-03 11:33:18 +01:00
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</code></pre>
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</section>
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2019-03-04 13:24:35 +01:00
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<section>
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<pre><code class="bash" contenteditable>
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# produziert 3 Videos; benötigt für Webseiten
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# damit alle Browser d. Video abspielen
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# video: h264; audio: aac ( default )
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ffmpeg -i infile -b:v 600k -b:a 128k -c:v libx264 out.mp4
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# video: vp9; audio: opus ( default )
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ffmpeg -i infile -b:v 600k -b:a 128k out.webm
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# video: theora; audio: ogg vorbis
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ffmpeg -i infile -codec:v libtheora -qscale:v 7 \
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-codec:a libvorbis -qscale:a 5 out.ogv
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</code></pre>
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</section>
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2019-03-03 11:33:18 +01:00
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<section>
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<ul>
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<li>Handbrake</li>
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<li>libdvdcss</li>
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</ul>
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</section>
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<section>
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2019-03-04 13:24:35 +01:00
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<span style="color: orange">Aufgabe:</span>
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2019-03-03 11:33:18 +01:00
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<ul>
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2019-03-04 13:24:35 +01:00
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<li>installiert ffmpeg</li>
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<li>erstellt aus <a href="/beispiele/16/infile.m4v">DIESEM</a> Video einen 10sec langen mp4 Video-Snippet.</li>
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<li>erstellt aus <a href="/beispiele/16/wav-file.zip">DIESEM</a> Wav ein MP3 mit 192kB Bitrate.</li>
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<li>erstellt aus der Wav-Datei eine flac Datei.</li>
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<li>vergleicht die Grössen.</li>
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<li>Warum ist es nicht sinnvoll aus einem mp3 ein wav zu machen?</li>
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2019-03-03 11:33:18 +01:00
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</ul>
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2019-03-04 13:24:35 +01:00
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Hinweis:
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<pre><code class="bash" contenteditable># 10sec langes video:
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ffmpeg -t 10 -i ..... </code></pre>
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2019-03-03 11:33:18 +01:00
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</section>
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2019-03-04 13:24:35 +01:00
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<section data-transition="slide" data-background="img/Jaromir-Chalabala1.jpg" data-background-transition="convex"> <h3 style="color: lightgrey; text-shadow: 1px 1px black">Audio Production</h3></section>
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2019-03-03 11:33:18 +01:00
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<section>
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2019-03-04 13:24:35 +01:00
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Audio unter Linux ist .... interessant.
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<p>Meist Kombination aus Pulseaudio / ALSA
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<p>PulseAudio -> Middleware
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<p>ALSA -> Treiber
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<p>Für Echtzeit-Audio-Verarbeitung ( möglichst geringe Latenzen ) muss die Kombination Jack / ALsa konfiguriert werden
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<aside class="notes">alsamixer</aside>
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2019-03-03 11:33:18 +01:00
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</section>
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2019-03-04 13:24:35 +01:00
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<section>Audacity
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<div><img src="img/audacity.png"></div></section>
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<section>
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Ardour - Professionelles Recording
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<div><img src="img/ardour.jpg"></div>
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</section>
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<section>
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Guitarix - Virtueller Gitarrenamp
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<div><img src="img/guitarix.jpg"></div>
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</section>
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<section>
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<p><a href="http://kxstudio.linuxaudio.org/index.php">Plugins und andere Tools</a>
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</section>
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<section>
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Jack
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<div><img src="img/QjackctlConnectionsForm.png"></div>
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</section>
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2019-03-03 11:33:18 +01:00
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<section>
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<h4>Abspielprgramme</h4>
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<ul>
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<li class="fragment">VLC</li>
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<li class="fragment">Mplayer</li>
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<li class="fragment">Rhythmbox</li>
|
2019-03-04 13:24:35 +01:00
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<li class="fragment">mocp</li>
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2019-03-03 11:33:18 +01:00
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</ul>
|
2019-03-04 13:24:35 +01:00
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</section>
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<section>
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<h4>Multimedia Distributionen</h4>
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<ul>
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<li><a href="http://www.bandshed.net/avlinux/">avlinux</a></li>
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<li><a href="http://ubuntustudio.org">UbuntuStudio</a></li>
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</ul>
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</section>
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<section>
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<h4>Gaming</h4>
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<ul>
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<li class="fragment ">Steam</li>
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<li class="fragment ">GOG</li>
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<li class="fragment ">viele Open Source Spiele
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<ul>
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<li>Sauerbraten</li>
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<li>Assault Cube</li>
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<li>Zero-K</li>
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<li>0 A.D.</li>
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<li>Flightgear</li>
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</ul>
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</li>
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</ul>
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2019-03-03 11:33:18 +01:00
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</section>
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</div>
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</div>
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<script src="lib/js/head.min.js"></script>
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<script src="js/reveal.js"></script>
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<script>
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// More info https://github.com/hakimel/reveal.js#configuration
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Reveal.initialize({
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transition: 'slide', // none/fade/slide/convex/concave/zoom
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// More info https://github.com/hakimel/reveal.js#dependencies
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dependencies: [
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