Video · damaged MP4 video media
MP4 with audio but no picture: find after an import failure
Where are recovered MP4 files that play audio only after a failed import?
Short answer
First compare the imported file with the card original: if the copy plays audio only but the card version shows a picture, the import broke and you can simply copy again. If both play sound only, test a player with HEVC support. Scan the card read-only only if the original has disappeared from it.
The situation
recovered MP4 files that play audio only is incomplete at the destination and no longer appears reliably on the source.
Compare the imported copy with the file on the card before anything else. If the card version shows a picture, the transfer broke off and a fresh copy settles it. If both play sound only, the cause is the decoder on this computer or the recording itself, not the import.
01 / Diagnose
Work out what actually disappeared
A copy that stops partway keeps the beginning of the container, and in many MP4 files the interleaving lets the audio play on while video samples further in are simply absent. Catalogue tools still report the clip as imported, so the case looks like data loss although the original lies untouched on the card.
Move, rename, catalog and delete-after-import steps can fail at different moments and leave source and destination in different states. For MP4 with audio but no picture, this matters because an audio track can remain readable while the video track or its sample mapping is damaged
Check the last known path, trash and backups without writing to the original device.
02 / Protect the source
Preserve the best recovery chance
- 1
Play the clip straight from the card in a player of your choice, without importing or transcoding it first.
- 2
If it shows a picture there, copy the file again in the file manager and compare the byte sizes afterwards.
- 3
If the card version has no picture either, try a player with HEVC and 10-bit support before assuming loss.
- 4
Only once the original has gone from the card, scan it read-only and export to a separate drive.
Do not repair or transcode the imported copy while the original is still on the card, and do not clear the card because the catalogue lists an entry. A conform of the broken copy becomes the only version as soon as the card is reused for the next shoot.
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 brings back files that are gone from the card; it does not mend a truncated copy on the computer and installs no codecs. As long as the card original exists, plain copying beats any scan.
04 / Verify
Check the recovered content, not just its name
The import is sound when the copy has the same byte size as the card original, plays picture and audio from start to finish and reports the same duration in the player. A copy that ends earlier than the original, or loses its picture midway, has to be transferred again.
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 damaged MP4 video media be recovered in this situation?+
Compare the imported copy with the file on the card before anything else. If the card version shows a picture, the transfer broke off and a fresh copy settles it. If both play sound only, the cause is the decoder on this computer or the recording itself, not the import. The result still depends on what remains readable on the source.
What should I avoid before scanning?+
Do not repair or transcode the imported copy while the original is still on the card, and do not clear the card because the catalogue lists an entry.
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?+
The import is sound when the copy has the same byte size as the card original, plays picture and audio from start to finish and reports the same duration in the player.