scholer / pptx-downsizer Goto Github PK

Hi,
thank you for developing this tool, it really solves a pain point I have encountered before.
I have a suggestion of something that would be nice to have: list all media files by size, as a way to inform the user.
The reason I am asking this is that I often have video files included in presentations, and often they are the reason for presentations exploding in size. When content is mixed between images and movies, it would help me judge what I should aim at first.

Cheers!
Florian

@scholer I used pptx-downsizer package to compress the image in pptx file.
The order of the image are getting collapesd and mixed up.

Can you pleaase help with this issue.

I have a script that depends on python-pptx that removes unused slide layouts. This can amount to a huge size reduction in some cases. Would be cool if this functionality was included in this project.

See below standalone python script to get an idea:

#!/usr/bin/env python3

import argparse
import collections.abc  # Python 3.10 workaround https://github.com/scanny/python-pptx/issues/762
from pptx import Presentation

parser = argparse.ArgumentParser(description="Remove unused pptx slide layouts")
parser.add_argument("filename")
parser.add_argument("-o", "--output", required=True, help="Where to save the output")
args = parser.parse_args()

count = 0
prs = Presentation(args.filename)
for slide_layout in prs.slide_layouts:
    if not slide_layout.used_by_slides:
        print(f"Removing unused slide layout:  {slide_layout.name}")
        prs.slide_layouts.remove(slide_layout)
        count += 1

if count == 0:
    print("All slide layouts in use. Nothing to do.")
else:
    prs.save(args.output)

I believe PIL doesn't support svg images which is why a pptx with an svg will fail. Probably better to skip the file if it's unsupported rather than die with an exception.

Traceback (most recent call last):
  File "/home/chahu/.local/bin/pptx-downsizer", line 8, in <module>
    sys.exit(cli())
  File "/home/chahu/.local/lib/python3.10/site-packages/pptx_downsizer/pptx_downsizer.py", line 466, in cli
    downsize_pptx_images(**params)
  File "/home/chahu/.local/lib/python3.10/site-packages/pptx_downsizer/pptx_downsizer.py", line 147, in downsize_pptx_images
    img = Image.open(imgfn)
  File "/usr/lib/python3/dist-packages/PIL/Image.py", line 3008, in open
    raise UnidentifiedImageError(
PIL.UnidentifiedImageError: cannot identify image file '/tmp/tmpwp8xphkm/ppt/media/image16.svg'