sh youtube2gif.sh

Posted 2021-05-07

#!/bin/bash
# Todo:
# brew install youtube-dl imagemagick ffmpeg
#
# Usage:
# ./youtube2gif {youtube_video_id}

videoid=$1

# youtubeからダウンロード
echo "download video ..."
youtube-dl https://www.youtube.com/watch?v=${videoid} -f mp4 -o ${videoid}.mp4

# いったんpngで書き出す
echo "output png image ..."
mkdir out
ffmpeg -t 00:00:15 -i ${videoid}.mp4 -an -r 1 out/%05d.png
rm ${videoid}.mp4

# gifのresize
echo "resizing image ..."
find out/ -type f -name '*.png' | xargs mogrify -resize 400

# gifファイルにまとめる
echo "compress gif image ..."
convert out/*.png ${videoid}.gif
rm -rf out