Fix OneDrive for Business Identifying Uploaded Videos as Audio Files
Question details
Users are experiencing an issue where video files uploaded to OneDrive for Business are misclassified as audio files, rendering them unplayable in the cloud.
- Product
- OneDrive for Business
- Device & OS
- not provided
- Scenario
- Uploading video files to cloud storage for online viewing and sharing.
- Observed behavior
- OneDrive incorrectly detects the video file type, displaying it as an audio file format and preventing it from being played as a video in the web interface.
Ensure that your video file plays correctly on your local device before troubleshooting the cloud version. Verify that the file extension accurately matches the actual media container format.
Verify and Correct the File Format and Extension
Ensure the video uses a standard format natively supported by OneDrive to prevent file type misclassification during upload.
Incorrect file extensions or unsupported codecs are the most common reasons OneDrive misidentifies media files. Manually verifying and correcting the format can force the platform to recognize the file as a video.
Locate the original video file on your local computer.
Right-click the file and select 'Properties' (Windows) or 'Get Info' (Mac) to check the file extension.
If the extension is missing or incorrect (e.g., named .mp3 instead of .mp4), rename the file to include the correct video extension.
Upload the corrected file to OneDrive for Business and check if it now displays and plays as a video.
Report Misclassification to Microsoft 365 Support
If the format is completely correct but OneDrive still misidentifies the file, the issue may require backend investigation by Microsoft Support.
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Frequently Asked Questions
Why does OneDrive change my video to an audio file?
This typically happens if the file has an incorrect file extension, uses an unsupported audio/video codec combination, or if OneDrive's automated media processing engine encounters a background error during upload.
Which video formats play best in OneDrive for Business?
OneDrive for Business generally offers the most reliable playback support for standard .mp4, .mov, and .m4v files utilizing the H.264 video codec and AAC audio codec.
Can I still download the misidentified file and play it locally?
Yes. Even if OneDrive's online web player misidentifies the file as audio, the original file data is preserved. You can download it to your local device and play it using a standard desktop media player.
