Check whether the presentation was processed with PowerPoint's Compress Media command. Microsoft explicitly warns that this operation removes embedded subtitles and alternative audio tracks in PowerPoint for Windows. A smaller presentation that still shows the picture may therefore no longer contain the version your family approved. Preserve the uncompressed presentation and video before changing anything else. Microsoft's compression guidance identifies this particular failure.
Confirm what disappeared
Compare the original video, the presentation before compression, and the presentation after compression. Open the actual files rather than relying on a screenshot of export settings. Start at a spoken section, inspect the subtitle menu where available, and listen to each intended audio option.
A subtitle painted into the picture is different from an embedded selectable track. If words were visibly part of the original frames, this warning alone does not explain their disappearance; check whether the wrong video version was inserted. If selectable captions or a separate description track vanished after compression, the documented behavior is a more direct explanation.
Write down the affected language and the last file in which it worked. “The captions are broken” leaves an editor guessing which of several copies needs replacing.
Keep a recoverable presentation
Make changes to a duplicate presentation. Retain the untouched video master, subtitle files, alternate recordings and a short note describing the intended screening version. An approved English description track should not exist only inside a presentation that somebody may compress before emailing it.
A file being present is only one part of the test. Microsoft's playback accessibility documentation describes caption and audio selection, with support varying by PowerPoint version. Check the actual venue computer in Slide Show mode. A successful preview on your editing computer does not establish the venue's controls.
Choose a dependable reception version
If the venue needs one fixed language and one fixed soundtrack, an external editor can make a separate screening video with the approved captions visible in the picture and the approved audio mix. Keep a clean master for later changes. This is a delivery choice, not a reason to discard editable subtitle assets.
If viewers need selectable languages or audio description, retain a playback route that supports those choices and rehearse its operation. Avoid converting everything into one fixed mix merely to make a smaller email attachment. Transfer size and audience access are separate requirements.
A fictional bilingual reception handoff
Consider a planned reception presentation containing a couple's film, selectable Chinese captions and an English audio-description track. The coordinator wants a smaller file for transfer. In this fictional example, the check occurs before approval: duplicate the package, apply the proposed compression, and attempt to select both additions on the receiving computer.
If the compressed version lacks either option, return to the uncompressed package or prepare explicitly labeled screening versions. Do not report the test as passed because the opening montage plays. The acceptance condition is the required captions and audio being usable through the entire film.
Check again after the last transfer
Play the quietest line, the longest subtitle and the ending from the transferred package. Confirm that names are correct and that the operator knows which language version to start. Keep an independently playable backup video in the agreed format.
Imagild's Film Studio can supply reviewed creative shots. Presentation packaging, caption selection and media compression require the chosen external editor and playback application; generating another AI shot will not restore a removed track from a compressed copy.