TL;DR

Collection of PDF processing tools

Docker Image

Here is an example of how to use the Docker image to get a command prompt and run commands:

docker run \
         --rm \
         -v /PATH/TO/YOUR/PDFs:/pdfutil \
         -it ghcr.io/ragingtiger/pdfutil:master

Where /PATH/TO/YOUR/PDF is clearly meant to be the user-specific path to the directory containing your PDF(s).

You could also execute pdftitle in the Docker run command:

docker run \
         --rm \
         -v /PATH/TO/YOUR/PDFs:/pdfutil \
         -it ghcr.io/ragingtiger/pdfutil:master \
           pdftitle -p your_untitled_pdf_file.pdf

Parallel

The Docker image also has GNU-Parallel installed and can be used as follows:

docker run \
         --rm \
         -v /PATH/TO/YOUR/PDFs:/pdfutil \
         -it ghcr.io/ragingtiger/pdfutil:master \
           ls *.pdf | parallel --eta 'echo {} $(pdftitle -p {}) >> rename_list.txt'

This command will create a file with two columns: the pdf file name, and the pdf title (if it can be found). Then you can edit the rename_list.txt file removing any unwanted results, and simply run:

cat rename_list.txt | parallel 'mv {}'

Examples

NOTE: The following examples all assume usage of the above Docker image.

PDF Title

Using the Python library pdftitle we can extract the title of the PDF a follows:

$ pdftitle -p your_untitled_pdf_file.pdf