YouTubeサムネを自動生成するシェルスクリプトを作った

#!/bin/bash

# this shellscript requires a YouTube video URL as an argument
# prefix and suffix of the thumbnail URL</span>
prefix="http://img.youtube.com/vi/"
suffix="/maxresdefault.jpg"

# make thumbnail URL from YouTube video URL
id=`echo ${1} | grep -oP "(?&lt;=\=)(.+)"`
url=$prefix$id$suffix

# download the thumnail image
curl -o image.jpg $url

# get the part number of the video
title=`curl ${1} 2>&1 | grep -oP "(?&lt;=)(.+)(?=)"`
number=`echo $title | grep -oP "(?&lt;=Part )(.+)(?= -)"`

# edit SVG image
sed -i -e "s:>#[0-9][0-9]\?:>#${number}:g" svg.svg
inkscape -e png.png svg.svg

# make a thumbnail image and remove intermidiate files
convert image.jpg png.png -composite ${number}.jpg
rm image.jpg png.png
mv *.jpg ~/ダウンロード/
exit 0

<!-- 前略 -->

<text 
  xml:space="preserve"
  style="font-style:normal;font-variant:normal;font-weight:bold;font-stretch:normal;font-size:56.99990463px;line-height:66.79676056px;font-family:'Super Mario';-inkscape-font-specification:'Super Mario Bold';font-variant-ligatures:normal;font-variant-position:normal;font-variant-caps:normal;font-variant-numeric:normal;font-variant-alternates:normal;font-feature-settings:normal;text-indent:0;text-align:end;text-decoration:none;text-decoration-line:none;text-decoration-style:solid;text-decoration-color:#000000;letter-spacing:normal;word-spacing:normal;text-transform:none;writing-mode:lr-tb;direction:ltr;text-orientation:mixed;dominant-baseline:auto;baseline-shift:baseline;text-anchor:end;white-space:normal;shape-padding:0;opacity:1;vector-effect:none;fill-opacity:1"
  x="152.92862"
  y="-190.62903"
  id="text2150">
  <tspan
    sodipodi:role="line"
    x="152.92862"
    y="-190.62903"
    id="tspan2168">
    #59
  </tspan>
</text>

<!-- 後略 -->