PDF 压缩

复制import subprocess
import os

# 使用 Ghostscript 压缩 PDF，三档质量
input_pdf = "input.pdf"
output_pdf = "output.pdf"

# 质量档位：/screen (低), /ebook (中), /prepress (高)
quality = "/ebook"  # 中等质量

# 构建 Ghostscript 命令
cmd = [
    "gs",
    "-sDEVICE=pdfwrite",
    "-dCompatibilityLevel=1.4",
    f"-dPDFSETTINGS={quality}",
    "-dNOPAUSE",
    "-dQUIET",
    "-dBATCH",
    f"-sOutputFile={output_pdf}",
    input_pdf
]

try:
    subprocess.run(cmd, check=True)
    print(f"压缩完成：{output_pdf}")
except subprocess.CalledProcessError as e:
    print(f"压缩失败：{e}")

复制package main

import (
	"fmt"
	"os"
	"os/exec"
)

func main() {
	inputPDF := "input.pdf"
	outputPDF := "output.pdf"
	quality := "/ebook" // 可选: /screen, /ebook, /prepress

	cmd := exec.Command("gs",
		"-sDEVICE=pdfwrite",
		"-dCompatibilityLevel=1.4",
		"-dPDFSETTINGS="+quality,
		"-dNOPAUSE",
		"-dQUIET",
		"-dBATCH",
		"-sOutputFile="+outputPDF,
		inputPDF,
	)

	if err := cmd.Run(); err != nil {
		fmt.Fprintf(os.Stderr, "压缩失败: %v\n", err)
		os.Exit(1)
	}
	fmt.Println("压缩完成:", outputPDF)
}

复制const { execSync } = require('child_process');
const path = require('path');

const inputPDF = 'input.pdf';
const outputPDF = 'output.pdf';
const quality = '/ebook'; // 可选: /screen, /ebook, /prepress

const cmd = [
  'gs',
  '-sDEVICE=pdfwrite',
  '-dCompatibilityLevel=1.4',
  `-dPDFSETTINGS=${quality}`,
  '-dNOPAUSE',
  '-dQUIET',
  '-dBATCH',
  `-sOutputFile=${outputPDF}`,
  inputPDF
].join(' ');

try {
  execSync(cmd, { stdio: 'inherit' });
  console.log('压缩完成:', outputPDF);
} catch (err) {
  console.error('压缩失败:', err.message);
  process.exit(1);
}