Video · multicamera exFAT cards
multicamera MP4 set: find after an import failure
Where are synchronized MP4 clips from several cameras after a failed import?
Short answer
First check for name collisions: cameras of the same model often use identical file names, and an import into one folder can skip or replace duplicates. Compare clip counts per camera against each card, search the trash and catalog, and scan a card read-only only if its originals have been deleted as well.
The situation
synchronized MP4 clips from several cameras is incomplete at the destination and no longer appears reliably on the source.
Before assuming anything was lost, count the clips per camera. Cameras of the same model produce identical file names, and an import that emptied every card into one folder can have skipped or replaced the duplicates, which makes complete angles look like missing ones.
01 / Diagnose
Work out what actually disappeared
Ingest tools treat name collisions differently: some skip the second file silently, some append a suffix, some overwrite. Add a transfer that broke off and the destination ends up with one clip where two belong, or with a file whose picture comes from a different camera than its name suggests. The cards are usually untouched.
Move, rename, catalog and delete-after-import steps can fail at different moments and leave source and destination in different states. For multicamera MP4 set, this matters because matching time ranges, camera IDs and audio references are needed to rebuild the production set
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 import and note how many clips each card holds, with their sizes, before anything is copied or deleted again.
- 2
Check the destination for name collisions and compare each file with the card version of the same number, camera by camera.
- 3
Copy the cards again into separate folders per camera, so that no two angles can claim the same file name.
- 4
Search trash and catalogue for clips the first run replaced, then confirm each angle plays from beginning to end.
Do not wipe the cards because the destination looks complete: a file count that adds up can still hold one camera twice. Avoid a second import into the same flat folder, and do not rename anything before source and destination have been compared.
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 reads exFAT, NTFS and FAT16/FAT32 media read-only and recovers files that are gone from the card; a file replaced at the destination by another camera is a copying problem rather than a recovery one. The card original stays the fastest route while it exists.
04 / Verify
Check the recovered content, not just its name
Every camera folder should hold as many clips as its card, with matching sizes and durations, and each file should show the angle its folder name promises. Opening one clip per camera and checking the picture against the shooting notes catches a swapped file quickly.
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 multicamera exFAT cards be recovered in this situation?+
Before assuming anything was lost, count the clips per camera. Cameras of the same model produce identical file names, and an import that emptied every card into one folder can have skipped or replaced the duplicates, which makes complete angles look like missing ones. The result still depends on what remains readable on the source.
What should I avoid before scanning?+
Do not wipe the cards because the destination looks complete: a file count that adds up can still hold one camera twice.
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?+
Every camera folder should hold as many clips as its card, with matching sizes and durations, and each file should show the angle its folder name promises.