This script converts PDFs and images into markdown text using OpenAI's GPT-4 model.

The script first checks if the input file is a PDF or an image (PNG, JPEG, WEBP, or non-animated GIF). If it's a PDF, it converts the PDF into images. Then, it sends each image to OpenAI's GPT-4 model, which returns the text in the image converted into markdown. The markdown text is then written to a markdown file.

1. Install the required Python packages by running pip install -r requirements.txt.
2. Set your OpenAI API key in the config.ini file under the OpenAI section.
3. Set the source directory (the directory containing the PDFs and images you want to convert) in the config.ini file under the Directories section.
4. Run the script with python pdf-to-markdown.py.

The script supports PNG (.png), JPEG (.jpeg and .jpg), WEBP (.webp), and non-animated GIF (.gif) image formats. If the input file is not a PDF or one of these image formats, the script will print an error message and skip the file.