Free online PPSX to AVI converter

A PPSX presentation may need to become a video when a playback device or editing program cannot open slide shows. AVI is useful for older Windows software and workflows that specifically require an AVI file.

What the PPSX format is

PPSX is the PowerPoint Open XML Slide Show format. It contains presentation slides and related media; opening it in PowerPoint normally starts the slide show rather than the editing view. Microsoft PowerPoint and compatible presentation software such as LibreOffice Impress can create or open PPSX files.

What the AVI format is

AVI is a video container, not a single video codec. It can hold video encoded with codecs such as MPEG-4 and audio such as MP3. Its support in older Windows applications and devices can make it useful for playback or editing, but the file size and compatibility depend on the codecs used.

How to convert PPSX to AVI

Online on 101convert.com

1. Upload the PPSX file on the converter page. You can add several files for batch conversion; the page shows the per-file size limit.
2. Set Show each page for to choose how long each slide appears.
3. Convert the file, then download the AVI.

Offline with desktop software

LibreOffice Impress and FFmpeg provide a free offline workflow on Windows, macOS, and Linux. This method turns slides into still images, so it does not preserve slide animations or transitions.

1. Open the PPSX in Impress and export it as a PDF using File → Export As → Export as PDF.
2. With Poppler’s pdftoppm installed, render the PDF pages to PNG files: pdftoppm -png -r 150 presentation.pdf slide. This produces files such as slide-1.png.
3. With FFmpeg installed, create an AVI that displays each page for five seconds: ffmpeg -framerate 1/5 -start_number 1 -i slide-%d.png -vf "scale=trunc(iw/2)*2:trunc(ih/2)*2" -r 25 -c:v mpeg4 -q:v 5 -pix_fmt yuv420p presentation.avi. Change 1/5 to another frame rate to adjust the slide duration.

Microsoft PowerPoint and FFmpeg are another offline option on Windows and macOS. In PowerPoint, set slide timings or choose a duration, then use File → Export → Create a Video to save an MP4. Convert that file to AVI with FFmpeg: ffmpeg -i presentation.mp4 -c:v mpeg4 -q:v 5 -c:a libmp3lame -q:a 4 presentation.avi. If the presentation has no audio, the output will have no audio track.

Quality and compatibility

A slide show must be rendered as video frames, so animations, transitions, and timing may change or be lost depending on the conversion method. Check the AVI in the target player: AVI does not guarantee that a particular device supports the codecs inside it. The MPEG-4 video and MP3 audio settings above are broadly supported, but AVI files can be larger than H.264 MP4 files at similar visual quality.