I created a large presentation in PPT with audio and video. On my iMAC running sequoi and LibreOffice 25.8.1.1 the file imports well with all mey slides and media controls show there is media on certain slides.
However, when I play the slide show, there is no audio and no video. The original videos were mp4s and audios were mp3s. The played perfectly well in Powerpoint.
This also makes it impossible to edit my presentation with any confidence. Is this a known problem? What can I do to make audio and video play?