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mirakui/memo.txt

Created September 2, 2012 12:48
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ffmpeg+ImageMagickによる分割アニメーションGIF作成コマンドメモ
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memo.txt
# 元の動画をトリミング
ffmpeg -i DSC_3872.avi -vcodec copy -acodec copy -ss '00:00:04.33' -t '00:00:05.48' trim01.avi
# 横幅500px（tumblrの上限）にリサイズしつつ animated gif に変換
convert -resize 500 trim01.avi trim01.gif
# 明るさ・コントラストをいじりつつ63色に減色（クロップ処理後に1MBに収まるように色数調整）
convert -brightness-contrast 40x40 -colors 63 trim01.gif trim01-v3.gif
# 横3x縦2にクロップする（画像同士の間隔は10px）
convert -crop 160x135+0+0 +repage trim01-v3.gif trim01-v3-1.gif
convert -crop 160x135+170+0 +repage trim01-v3.gif trim01-v3-2.gif
convert -crop 160x135+340+0 +repage trim01-v3.gif trim01-v3-3.gif
convert -crop 160x136+0+145 +repage trim01-v3.gif trim01-v3-4.gif
convert -crop 160x136+170+145 +repage trim01-v3.gif trim01-v3-5.gif
convert -crop 160x136+340+145 +repage trim01-v3.gif trim01-v3-6.gif
# 結果: http://diary.mirakui.com/post/30721296029/tjparty
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