https://github.com/slhck/compress-pptx
Compress a PPTX file, converting all PNG/TIFF images to lossy JPEGs
https://github.com/slhck/compress-pptx
pptx python
Last synced: 6 months ago
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Compress a PPTX file, converting all PNG/TIFF images to lossy JPEGs
- Host: GitHub
- URL: https://github.com/slhck/compress-pptx
- Owner: slhck
- License: other
- Created: 2021-01-26T10:12:21.000Z (over 4 years ago)
- Default Branch: main
- Last Pushed: 2023-10-02T19:15:25.000Z (about 2 years ago)
- Last Synced: 2025-05-01T10:13:01.921Z (6 months ago)
- Topics: pptx, python
- Language: Python
- Homepage:
- Size: 1.6 MB
- Stars: 27
- Watchers: 3
- Forks: 5
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- License: LICENSE.md
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README
# compress-pptx
[](https://pypi.org/project/compress-pptx)
[](#contributors-)
Compress a PPTX or POTX file, converting all PNG/TIFF images to lossy JPEGs.
## What it does
When copy-pasting images to PowerPoint presentations, these sometimes get inserted as lossless versions, blowing up the size of the presentation.
This script takes all PNG or TIFF images part of the presentation which are larger than a given threshold (1 MiB by default), converts them to a lossy JPEG variant, and creates a new PPTX file.
:warning: This is not the same as compressing images with PowerPoint's own functionality. You may still need to do this to reduce the size of your presentation!
PNGs containing transparency can be skipped to prevent graphics issues. Normally their transparent parts are replaced with white (although you can choose another color).
## Requirements
- Operating system: macOS or Linux
- Note: Under Linux, you need LibreOffice installed to convert embedded EMF files
- Python 3.8 or higher
- ImageMagick's `magick` commands (`magick convert` and `magick identify`)
- Optionally: `ffmpeg` for media files, and
Under Ubuntu, get ImageMagick via:
```
apt install imagemagick
```
Under macOS, install it with [Homebrew](https://brew.sh):
```
brew install imagemagick
```
For ffmpeg, use the static builds from [ffmpeg.org](https://ffmpeg.org/downloads.html).
## Installation
Via pip:
```
pip3 install --user compress-pptx
```
## Usage
Call `compress-pptx` and point it to a PPTX or POTX file. It'll compress the images and output another compressed file next to it.
For more options, see the `-h` output:
```
usage: compress-pptx [-h] [-o OUTPUT] [-s SIZE] [-q QUALITY] [-t TRANSPARENCY]
[-k] [-v] [-f] [-m] [-j] [-l] [--num-cpus NUM_CPUS]
input
positional arguments:
input
options:
-h, --help show this help message and exit
-o OUTPUT, --output OUTPUT
Output file (default: None)
-s SIZE, --size SIZE Minimum size threshold in bytes. Also accepts the
suffixes k/M/G or KiB/MiB/GiB (default: 1MiB)
-q QUALITY, --quality QUALITY
JPEG output quality (0-100) (default: 85)
-t TRANSPARENCY, --transparency TRANSPARENCY
Replace transparency with color (default: white)
-k, --skip-transparent-images
Skip converting transparent images at all (default:
False)
-v, --verbose Show additional info (default: False)
-f, --force Force overwriting output file (default: False)
-m, --compress-media Compress other media types such as audio and video
(requires ffmpeg) (default: False)
-j, --recompress-jpeg
Recompress jpeg images (default: False)
-l, --use-libreoffice
Use LibreOffice to compress EMF files (only way to
compress EMF files under Linux) (default: False)
--num-cpus NUM_CPUS Number of CPUs to use (default: all available CPUs)
```
## Bash Version
There's an unmaintained Bash version under `bash/compress-pptx.sh`.
## Contributors
## License
MIT License
Copyright (c) 2021-2023 Werner Robitza
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.
