用途

• beamer 生成的 PDF 转 PPTX
• marp 导出的 PDF 转 PPTX
• PPTX 导出的 PDF 再转为高清图片档 PPTX

过程

• 将 PDF 文档导出为 PNG 图片，每页一张。
• 每张 PNG 作为一张 slide，做成一个 PPTX 文档。

安装

需安装

• python-pptx，pip install python-pptx
• pymupdf，pip install pymupdf

使用

用法：python pdf_to_pptx.py test.pdf {RATIO} {ZOOM-FACTOR}，

其中 {RATIO} 表示 PDF 页面的宽高比例，{ZOOM-FACTOR} 控制图片清晰度。

如

python pdf_to_pptx.py test.pdf 4:3 5

或

python pdf_to_pptx.py test.pdf 16:9 10

代码

pdf_to_pptx.py

# encoding: UTF-8

# pip install python-pptx
#     https://python-pptx.readthedocs.io/
# pip install pymupdf
#     https://pymupdf.readthedocs.io/en/latest/

import sys, math, io
from pptx import Presentation
from pptx.util import Inches
from pptx.parts.image import Image 
import fitz 

# args: pdf_filename, aspect_ratio, zoom_factor
pdf_filename = sys.argv[1]
width, height = list(map(int, sys.argv[2].split(\':\')))
zoom_factor = int(sys.argv[3])

prs = Presentation()
prs.slide_width = Inches(width)
prs.slide_height = Inches(height)
blank_slide_layout = prs.slide_layouts[6]

mat = fitz.Matrix(zoom_factor, zoom_factor)  # zoom factor in each dimension
doc = fitz.open(pdf_filename)  # open document
print(\'#pages\', len(doc))
for i, page in enumerate(doc):  # iterate through the pages
    pix = page.getPixmap(matrix = mat, alpha=False)  # use \'mat\' instead of the identity matrix
    png_data = pix.getImageData(\'png\')
    tmp_file = io.BytesIO(png_data)
    
    slide = prs.slides.add_slide(blank_slide_layout)
    pic = slide.shapes.add_picture(tmp_file, 0, 0, width=prs.slide_width)
    print(\'page {}, image size: ({}, {})\'.format(i+1, pix.width, pix.height))
        
pptx_filename = pdf_filename.replace(\'.pdf\', \'_converted.pptx\')
prs.save(pptx_filename)
print(\'saved to\', pptx_filename)

旧版本

安装及使用

需安装

• python-pptx，pip install python-pptx
• pdftk
• pdftoppm

用法：python pdf_to_pptx.py test.pdf {RATIO} {DPI}，

其中 {RATIO} 表示 PDF 页面的宽高比例，{DPI} 表示图片 DPI，控制图片清晰度。

如

python pdf_to_pptx.py test.pdf 4:3 500

或

python pdf_to_pptx.py test.pdf 16:9 1000

代码

pdf_to_pptx.py

# encoding: UTF-8

# pip install python-pptx
#     https://python-pptx.readthedocs.io/
# need pdftk, pdftoppm installed

import sys
import os
import re
import math
from pptx import Presentation
from pptx.util import Inches
from pptx.parts.image import Image 

# args: pdf_filename, aspect_ratio, dpi
pdf_filename = sys.argv[1]
width, height = list(map(int, sys.argv[2].split(\':\')))
dpi = int(sys.argv[3])

tmp_dir = \'png_tmps\'
os.system(\'mkdir -p {}\'.format(tmp_dir))

# dump pdf meta-data to get number of pages 
os.system(\'pdftk {} dump_data_utf8 output {}/data.txt\'.format(pdf_filename, tmp_dir))
data_content = open(\'{}/data.txt\'.format(tmp_dir)).read()
groups = re.findall(\'NumberOfPages: (\d+)\', data_content)
page_num = int(groups[0])
print(\'#pages:\', page_num)

prs = Presentation()
prs.slide_width = Inches(width)
prs.slide_height = Inches(height)
# _ = math.gcd(prs.slide_width, prs.slide_height)
# print(\'PPT Aspect Ratio: {}/{}\'.format(prs.slide_width//_, prs.slide_height//_))

blank_slide_layout = prs.slide_layouts[6]
for i in range(1, page_num+1):
    os.system(\'pdftoppm {0}  {1}/{2} -png -f {2} -singlefile -r {3}\'.format(pdf_filename, tmp_dir, i, dpi))
    img_path = \'{}/{}.png\'.format(tmp_dir, i)
    img = Image.from_file(img_path)
    
    slide = prs.slides.add_slide(blank_slide_layout)
    pic = slide.shapes.add_picture(img_path, 0, 0, width=prs.slide_width)
    
    img_width, img_height = img.size
    _ = math.gcd(img_width, img_height)
    
    print(i, img.size, \'{}:{}\'.format(img_width//_, img_height//_))
    
pptx_filename = pdf_filename.replace(\'.pdf\', \'_converted.pptx\')
prs.save(pptx_filename)
print(\'saved to\', pptx_filename)

END

2020.5.10 晚 22:13
2020.6.14 晚 21:08 添加新版本