Unable to get page count. Is poppler installed and in PATH？

现象

Traceback (most recent call last):
  File "/home/lp/iocr-pdf-service/app/utils.py", line 135, in request_api_update
    img_list, img_base64_list = pdf2img_bytes(file, show_flag=True)
  File "/home/lp/iocr-pdf-service/app/utils.py", line 42, in pdf2img_bytes
    image_from_path = convert_from_bytes(pdf_file, output_folder=path, fmt=IMAGE_FMT)
  File "/usr/local/python3.6.9/lib/python3.6/site-packages/pdf2image/pdf2image.py", line 380, in convert_from_bytes
    hide_annotations=hide_annotations,
  File "/usr/local/python3.6.9/lib/python3.6/site-packages/pdf2image/pdf2image.py", line 128, in convert_from_path
    pdf_path, userpw, ownerpw, poppler_path=poppler_path
  File "/usr/local/python3.6.9/lib/python3.6/site-packages/pdf2image/pdf2image.py", line 595, in pdfinfo_from_path
    "Unable to get page count. Is poppler installed and in PATH?"
pdf2image.exceptions.PDFInfoNotInstalledError: Unable to get page count. Is poppler installed and in PATH?

解决

系统中未安装 poppler，这是一个用于呈现可移植文档格式(PDF)文档的免费软件实用程序库。

poppler 官网：https://poppler.freedesktop.org/

Centos

直接用下面的命令进行安装：

yum install poppler poppler-cpp-devel poppler-utils

如果没有安装“poppler-utils”就会出现如下所示的错误：Exception: Unable to get page count. Is poppler installed and in PATH?

Ubuntu

直接用下面的命令进行安装：

apt-get install -y poppler-utils libpoppler-dev

安装完成之后，可以通过输入以下命令检查 Poppler 版本:

pdftotext -v

输出 pdftotext version 代表成功

pdftotext version 0.86.1
Copyright 2005-2020 The Poppler Developers - http://poppler.freedesktop.org
Copyright 1996-2011 Glyph & Cog, LLC

windows

poppler-windows 下载地址：https://github.com/oschwartz10612/poppler-windows/releases/

下载压缩包 zip 即可。下载后解压到任意一个文件目录，建议是c盘，如 C:\Program Files

有两种方式使用：

1. 将解压后目录 C:\Program Files\poppler-23.05.0\Library\bin 添加到系统的环境变量中。加完之后需要重启 pycharm。

2. 修改源码，修改安装包内的 pdf2image.py 中的 poppler 路径

   def convert_from_path(
       pdf_path,
       dpi=200,
       output_folder=None,
       first_page=None,
       last_page=None,
       fmt="ppm",
       jpegopt=None,
       thread_count=1,
       userpw=None,
       use_cropbox=False,
       strict=False,
       transparent=False,
       single_file=False,
       output_file=uuid_generator(),
       poppler_path=r'C:\Program Files\poppler-23.05.0\Library\bin',  #将这里改为你解压安装的poppler路径
       grayscale=False,
       size=None,
       paths_only=False,
       use_pdftocairo=False,
       timeout=None,
   }