Free online ODP to MKV converter

A presentation may need to become a video when a player or media library accepts MKV but not ODP. Converting it renders the slides into a timed video that can be shared or played without presentation software.

What the ODP format is

ODP (OpenDocument Presentation) is an open format for slide decks, including text, images, charts, and slide effects. LibreOffice Impress creates and opens ODP files; Apache OpenOffice and some versions of Microsoft PowerPoint can also open them. An ODP file is a presentation document, not a video.

What the MKV format is

MKV (Matroska Video) is a container for video, audio, subtitles, and related tracks. It can hold video encoded with codecs such as H.264, but the container itself does not determine image quality or guarantee that every device can play the file. Choose MKV when the target player supports Matroska or when you need a container that can hold multiple media tracks.

How to convert ODP to MKV

Online on 101convert.com

1. Open the ODP-to-MKV converter page on 101convert.com and upload the presentation. The page allows batch conversion; check its displayed per-file size limit.
2. Set show each page for to the required slide duration.
3. Start the conversion, then download the MKV file when it is ready.

Offline with desktop software

LibreOffice Impress and FFmpeg provide a free, open-source workflow on Windows, macOS, and Linux. This method renders each slide as a still image, so slide animations and transitions are not retained.

1. Export the deck to PDF in Impress using File → Export As → Export as PDF.
2. Use Poppler’s pdftoppm utility to render the PDF pages as numbered PNG images. For example: pdftoppm -png -r 150 presentation.pdf slide. This creates files such as slide-1.png.
3. With FFmpeg installed, encode the images into a five-second-per-slide MKV: ffmpeg -framerate 1/5 -start_number 1 -i slide-%d.png -vf "pad=ceil(iw/2)*2:ceil(ih/2)*2,fps=25,format=yuv420p" -c:v libx264 presentation.mkv. Change 1/5 to another fraction for a different duration; for example, 1/8 displays each slide for eight seconds.

Microsoft PowerPoint is a commercial alternative on supported desktop versions for Windows. Open the ODP file, use File → Export → Create a Video, and export an MP4 with the desired slide timings. Then remux it into MKV with FFmpeg: ffmpeg -i presentation.mp4 -c copy presentation.mkv. Stream copying avoids re-encoding, provided the target player supports the codecs in the MP4.

Quality and compatibility

The video shows rendered slides rather than editable presentation objects. Review the exported result for layout changes, and choose an adequate render resolution to keep text legible. The LibreOffice image-sequence command uses a fixed duration per slide and does not add audio; the PowerPoint route can use recorded timings or narration when available. Playback depends on the device supporting both the MKV container and the video codec inside it.