SHELL-等比例批量生成缩略图

发布日期: 2020-12-23

文章字数: 149

阅读次数:

等比例批量生成缩略图

使用 graphicsmagick

`graphicsmagick` 安装

# ubuntu
apt-get install graphicsmagick
# macos
brew install GraphicsMagick

# 查看安装信息
# which gm && unalias gm
gm -version

图片压缩命令

gm convert input.jpg -thumbnail '240x135' output_1.jpg

处理脚本

src_path=. # 压缩源图输入目录
tgt_path=. # 压缩源图输出目录

# 方法一
function make_thumbnail {
  for file in `ls $1`
  do
    echo $file
    image="${1}/${file}"
    thumb="${2}/${file}"
    
    if [ -d ${image} ]
    then
      mkdir -p ${thumb}
      make_thumbnail ${image} ${thumb}
    elif [ ! -f ${thumb} ]
    then
      echo $thumb
      # gm convert -resize "240x135" -quality 85 -strip ${image} ${thumb}
      gm convert -thumbnail '240x135' -strip ${image} ${thumb}
    else
      echo "already exists"
    fi
    echo "***************"
  done
}
make_thumbnail $src_path $tgt_path

# 方法二
find $src_path -size +20k | xargs -i gm convert -thumbnail '240x135' -strip {} $tgt_path/{}