Python

PPT转PDF转PNG图片 | Python | comtypes | pdf2image | poppler

业务上需要把PPT转换成PNG图片，使用comtypes先转换成pdf，然后pdf2image加poppler按页转换PNG。

环境加依赖库的准备

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Python 3.12.4
python -m pip install comtypes
python -m pip install pdf2image
poppler
# 下载地址 https://github.com/oschwartz10612/poppler-windows/releases/
# 安装后配置路径到环境变量Path中，验证工作正常
poppler -v

转换代码

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import comtypes.client
from pdf2image import convert_from_path
import os

def init_powerpoint():
    powerpoint = comtypes.client.CreateObject("Powerpoint.Application", dynamic=True)
    powerpoint.Visible = 1
    return powerpoint

def ppt_to_pdf(powerpoint, inputFileName, outputFileName, formatType=32):
    if outputFileName[-3:] != 'pdf':
        outputFileName = outputFileName + ".pdf"
    deck = powerpoint.Presentations.Open(inputFileName)
    deck.SaveAs(outputFileName, formatType)
    deck.Close()

def pdf_to_img(inputFileName):
    images = convert_from_path(inputFileName)
    for index, image in enumerate(images):
        image.save(f'{inputFileName}-{index}.png')

def convert_ppt_to_pdf(powerpoint, folder):
    files = os.listdir(folder)
    pptfiles = [f for f in files if f.endswith((".ppt", ".pptx"))]
    for pptfile in pptfiles:
        fullpath = os.path.join(folder, pptfile)
        ppt_to_pdf(powerpoint, fullpath, fullpath)

def convert_pdf_to_img(folder):
    files = os.listdir(folder)
    pdffiles = [f for f in files if f.endswith((".pdf"))]
    for pdffile in pdffiles:
        fullpath = os.path.join(folder, pdffile)
        pdf_to_img(fullpath)

if __name__ == "__main__":
    powerpoint = init_powerpoint()
    cwd = os.getcwd()
    convert_ppt_to_pdf(powerpoint, cwd)
    convert_pdf_to_img(cwd)
    powerpoint.Quit()

‘POINTER(IUnknown)’ object has no attribute ‘Presentations’错误解决

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    deck = powerpoint.Presentations.Open(inputFileName)
           ^^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'POINTER(IUnknown)' object has no attribute 'Presentations'

# 初始化powerpoint对象时加上 dynamic=True
    powerpoint = comtypes.client.CreateObject("Powerpoint.Application", dynamic=True)

参考文章

batch-ppt-to-pdf
Python实现ppt转pdf代码报错