A command-line tool that utilises ffmpeg in order to overwrite narrated powerpoints with a custom playback speed.

• Python 3.5+

• FFmpeg binary in PATH. See here for more information.

python ppt_playback.py -d="absolute/path/to/dir/" N

where N is a speed value between [0.5, 100.0].

For each powerpoint in the directory, a new powerpoint will be created unless the -o flag is used.

-d is an optional argument. defaults to current working directory.

The following message can be shown using the h or --help flag.

usage: ppt_playback.py [-h] [--quiet] [--overwrite] [--dir [DIR]] speed
Change the playback speed of powerpoint narration
positional arguments:
 speed desired playback speed
optional arguments:
 -h, --help show this help message and exit
 --quiet, -q surpress FFmpeg stdout messages
 --overwrite, -o overwrite the powerpoint
 --dir [DIR], -d [DIR]

• Ubuntu 20.04/20.10

• Windows 10

Should also work on any platform that meets the requirements.

Inspired by the PowerPointAudio-Extractor script.