Free online PPTM to AVI converter

Some older playback devices and editing systems accept AVI files but cannot open PowerPoint presentations. Converting a PPTM presentation to video makes its slides playable as a timed sequence, though interactive macros cannot operate in the resulting file.

What the PPTM format is

PPTM is the macro-enabled presentation format used by Microsoft PowerPoint. It stores slides, transitions, media, and VBA macros; you may encounter it when someone shares a presentation that includes automated tasks or interactive features.

What the AVI format is

AVI is a video container used by many desktop players, editors, and legacy devices. It can hold video encoded with different codecs, so compatibility depends on both the AVI container and the codec used. AVI can suit older workflows, but files may be larger than comparable MP4 files.

How to convert PPTM to AVI

Online on 101convert.com

1. Upload the PPTM file on the converter page.
2. Select AVI and, before converting, set show each page for if you want to specify how long each slide is displayed.
3. Start the conversion and download the AVI file when it is ready. Several files can be converted as a batch; the page shows the per-file size limit.

Offline with desktop software

Free option: LibreOffice and FFmpeg. This method makes a video from still images of the slides; it does not preserve animations, transitions, narration, embedded video, or macro behavior. LibreOffice runs on Windows, macOS, and Linux; FFmpeg is available on those systems too.

1. Open a terminal in the folder containing the presentation and export it to PDF: libreoffice --headless --convert-to pdf --outdir rendered deck.pptm
2. Render the PDF pages as images: pdftoppm -png -r 150 rendered/deck.pdf rendered/slide. This creates files such as slide-1.png.
3. Make an AVI with each slide shown for five seconds: ffmpeg -framerate 1/5 -i rendered/slide-%d.png -vf fps=25 -c:v mjpeg -q:v 3 -pix_fmt yuvj420p slides.avi. Change 1/5 to adjust the display time.

Microsoft PowerPoint and FFmpeg. In PowerPoint desktop, open the presentation and choose File → Export → Create a Video. Select the video quality and timing option, then create the video; available export formats depend on the PowerPoint version and may include MP4 or WMV. Convert that exported video with FFmpeg: ffmpeg -i presentation.mp4 -c:v mjpeg -q:v 3 -c:a libmp3lame -q:a 4 presentation.avi. Replace the input filename with the actual exported filename. PowerPoint is commercial software; FFmpeg is free and open source.

Quality and compatibility limitations

PPTM macros do not run in AVI, and a video cannot retain clickable slide controls. PowerPoint’s video export can retain slide timing and visual effects, but macro-driven behavior is not recorded as an interactive feature. AVI compatibility also varies by codec; MJPEG is a practical choice for broad desktop support, but check the target player’s codec requirements.