Motionix / Your workspace
Find the mismatch before another export.
An MP4 name does not explain what is inside. Inspect the video and sound, choose a destination profile, and get an actionable report rather than a fake compatibility score.
Matching a profile is not a playback guarantee. PowerPoint version, operating system, installed extensions and the actual receiving device can change the result.
Three steps. One result to inspect.
Inspect the actual file
Read the available track metadata. The extension alone does not identify the video or audio codec.
Choose the target environment
Select the platform/version you need to support. Browser decoding and application compatibility are different questions.
Follow the finding, not a score
Review warnings and unknowns, save a report, and test a copy on the receiving device. Convert only when a supported change is useful.
Why an MP4 video may not play in PowerPoint
MP4 describes a container. It can hold different video and audio codecs, and a familiar extension does not establish support in your application. Microsoft recommends MP4 with H.264 video and AAC audio, while also documenting other formats and platform-specific conditions. Compare the actual metadata with your selected profile. A browser being able to play the file does not mean the same decoder or media extension exists in PowerPoint.
WebM and older formats need version-aware advice
Do not treat every WebM as unsupported. Microsoft's current guidance includes WebM in supported Windows formats and describes an extension requirement for Vorbis audio. It also distinguishes macOS and mobile formats and notes deprecated legacy support. The checker explains what the selected profile covers and what it cannot determine. When your version or installed components are unknown, a warning is more useful than a fabricated pass or fail.
Missing sound, unknown codecs and unreadable files
A video without audio is not automatically damaged. Likewise, a present audio track may use a codec the destination cannot play. Review video and sound separately. An unsupported or corrupted container may prevent inspection altogether; this tool does not rebuild it. Metadata reports describe the file, not its ownership or legal status. Keep the original and distinguish a missing field from a proven defect.
Choose a compatible export only when the browser can make it
If a change is appropriate, use a supported export and check its actual video and audio tracks. The local compressor can only convert sources the browser can decode; detecting HEVC metadata does not magically add a decoder. Do not silently remove sound to make a file pass a check. Save the diagnostic report for a colleague, test the result in the destination, and avoid treating a suggested profile as a guarantee.
Your files, with explicit choices
File processing does not require an upload. The site and processing assets use the network. Results are not automatically backed up. Download your result and keep the original.
Frequently asked questions
Does an MP4 extension prove a video will play?
No. MP4 is a container. Its codecs, your application version and your device determine compatibility.
Can PowerPoint use WebM?
Some current environments support WebM with platform and codec conditions. The checker does not label every WebM incompatible.
Can the checker repair a corrupted video?
No. It reports readable metadata and known limitations. A damaged or unsupported container may prevent diagnosis.
Does browser playback prove PowerPoint compatibility?
No. Browsers and PowerPoint can support different codecs. Browser decoding and the application profile are separate checks.
What does an uncertain finding mean?
Check the official guidance and test a copy on the receiving device. Missing metadata is not automatically a confirmed failure.
Sources and the limits of this page
Sources checked
- Microsoft PowerPoint media formats
Recommendations and platform/version conditions; not a guarantee for every device.
- MDN video codec guide
Container names and encoded media are different layers.
These references explain formats or published requirements. They do not represent a partnership or an inspection of your file. Check the current requirements before using an export.