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MP4 is labeled MOV on Chrome #6761
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Originally created by @felix920506 on GitHub (Feb 19, 2025).
This issue respects the following points:
Describe the bug
MP4 containers are labeled MOV in Chrome in the playback info window
Reproduction Steps
Expected/Actual behaviour
Expected: Source media format should say mp4
Actual: Source media format says mov
Logs
No response
Server version
10.10.6
Web version
10.10.6
Build version
10.10.6
Platform
macOS
Browser
Chrome
Additional information
No response
@jhparker88 commented on GitHub (Feb 25, 2025):
I've recognize the issue as well and for further elaboration I added some screen-dumps (from the dev cloudflare deployment [1]). For the movie "Caminandes: Gran Dillama" one can see:
The movie being a mp4 file:

The transcode showing as

mov:[1] https://9b4f6896.jellyfin-web.pages.dev/#/movies.html?topParentId=f137a2dd21bbc1b99aa5c0f6bf02a805&collectionType=movies
@jellyfin-bot commented on GitHub (Jun 25, 2025):
This issue has gone 120 days without comment. To avoid abandoned issues, it will be closed in 21 days if there are no new comments.
If you're the original submitter of this issue, please comment confirming if this issue still affects you in the latest release or master branch, or close the issue if it has been fixed. If you're another user also affected by this bug, please comment confirming so. Either action will remove the stale label.
This bot exists to prevent issues from becoming stale and forgotten. Jellyfin is always moving forward, and bugs are often fixed as side effects of other changes. We therefore ask that bug report authors remain vigilant about their issues to ensure they are closed if fixed, or re-confirmed - perhaps with fresh logs or reproduction examples - regularly. If you have any questions you can reach us on Matrix or Social Media.
@felix920506 commented on GitHub (Jun 25, 2025):
still happens
@thornbill commented on GitHub (Jun 27, 2025):
Web just displays the information it is given 🤷♂️ transferring to server repo
@gnattu commented on GitHub (Jun 27, 2025):
If it is an old video replace all metadata might "fix" this, but this is not that problematic because technically mp4 is a more standardized subset of the mov with stricter rules for compatibility, and ffmpeg treats them as a same container, and we even wrote both mov and mp4 into the database in earlier versions as the probe result returns both. In recent versions we only write mp4 to db but it is still very possible that ffmpeg detect a specific video as mov.
@jellyfin-bot commented on GitHub (Oct 26, 2025):
This issue has gone 120 days without an update and will be closed within 21 days if there is no new activity. To prevent this issue from being closed, please confirm the issue has not already been fixed by providing updated examples or logs.
If you have any questions you can use one of several ways to contact us.
@jellyfin-bot commented on GitHub (Nov 16, 2025):
This issue was closed due to inactivity.