Video · exFAT video card
MP4 mdat without moov: find after an import failure
Where are video payload with missing MP4 metadata after a failed import?
Short answer
First look for copies that exist but will not open: an import tool may have skipped an MP4 without moov as unreadable. Check the destination, trash and import logs, then the card. If the file is gone everywhere, scan the unused card read-only and plan an index repair on a copy.
The situation
video payload with missing MP4 metadata is incomplete at the destination and no longer appears reliably on the source.
An import tool that reports nothing copied may simply have refused the file. Software that reads the moov index before transferring treats an MP4 without one as unreadable and skips it, which leaves the clip on the card and absent from the destination.
01 / Diagnose
Work out what actually disappeared
Ingest applications usually parse a container to show duration and thumbnails. A clip whose index is missing fails that step, so it is either skipped silently or logged as damaged. Meanwhile a delete-after-import routine may have cleared clips that did transfer, and the card now shows a mixture: some takes gone, the unreadable one still sitting there.
Move, rename, catalog and delete-after-import steps can fail at different moments and leave source and destination in different states. For MP4 mdat without moov, this matters because a large mdat can contain frames while the moov structure needed for playback is missing
Check the last known path, trash and backups without writing to the original device.
02 / Protect the source
Preserve the best recovery chance
- 1
Stop the ingest tool and read its log; a skipped or damaged entry names the clip you are looking for.
- 2
Check the destination, the trash and the temporary import folder for a file of the right name but the wrong size.
- 3
Copy the clip off the card by hand with the file manager, which does not care whether the container parses.
- 4
If it is gone from the card as well, scan the exFAT volume read-only and export to a separate drive.
Do not let the import tool delete the source because it counted the clip as processed, and do not convert the file to make the software accept it. A conversion needs a readable index and will produce an empty result while replacing the only copy.
03 / Choose the method
Match the tool to the source
For stable, readable exFAT, NTFS and FAT16/FAT32 or uncompressed IMG, DD, RAW and BIN images.
Unconfirmed exports are marked .UNVERIFIED.
File Recovery Hero recovers files from readable exFAT, NTFS and FAT media and from uncompressed images on macOS and Windows; it does not read an ingest database, repair a container or work on APFS destinations. Scanning is free, exporting needs the 50 € license.
04 / Verify
Check the recovered content, not just its name
Compare the copy with the card entry byte for byte before touching it further. The clip will still not play, and that is expected at this stage. Only after an index rebuild should it open, report a duration that matches the shoot and run to the end without stalling.
Keep the source until two verified copies exist. One working preview is not enough.
Sources and technical references
FAQ
Questions about this recovery case
Can exFAT video card be recovered in this situation?+
An import tool that reports nothing copied may simply have refused the file. Software that reads the moov index before transferring treats an MP4 without one as unreadable and skips it, which leaves the clip on the card and absent from the destination. The result still depends on what remains readable on the source.
What should I avoid before scanning?+
Do not let the import tool delete the source because it counted the clip as processed, and do not convert the file to make the software accept it.
Does scanning write to my memory card?+
Your memory card is only read. Nothing is saved to it.
How do I know whether the result is complete?+
Compare the copy with the card entry byte for byte before touching it further.