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Recovered video files won’t play? How to repair them
Recovery software can bring back the bytes of a deleted video without bringing back a playable file. Some recovered videos only need their structure rebuilt; others contain pieces of different files and cannot be put back together by any repair tool. Here is how to tell them apart and get the most out of what you recovered.
Why recovered videos come back broken
When a file is deleted or a card is formatted, the video data usually stays on the storage until something new is written over it. Recovery software finds that data in one of two ways:
- From the file system records. If the records that describe the file are still there, the tool can rebuild it with its name and folder. This usually gives the best results. On the FAT file systems used by many memory cards, however, deleting a file also clears the list of where its pieces were, so a video stored in several pieces can still come back incomplete.
- From the content alone (often called carving or raw or deep scan). When the records are gone, the tool looks for the patterns that mark the start of a video and copies data from there. It has to guess where the file ends and assumes the data is in one continuous piece. As the PhotoRec documentation puts it, when the data is not fragmented the recovered file should be identical to the original or larger.
Videos are large, and storage often splits large files into pieces spread across the card, especially when it was nearly full or files were deleted and re-recorded. A content-based recovery of a split file can return a video that starts correctly and then continues with data from something else. Its index, which most cameras write at the end of the file, may be missing or may belong to another file.
Some cameras always store their videos in several pieces on the card. The PhotoRec documentation names, for example, the Canon 5D Mark III and several GoPro models, and notes that videos split into more than two pieces need special tools. Deleted videos from such cameras are especially hard to recover in one go.
Typical symptoms, and what they suggest
| What you see | Likely cause | Can repair help? |
|---|---|---|
| The file won’t open, shows 0:00 or “moov atom not found”, but its size looks right | The index was not recovered; the video data may be complete | Often yes, by rebuilding the index |
| Plays for a while, then freezes, stops or shows grey or green blocks | The file contains data from other files after a certain point | Partly: the intact part can usually be saved |
| The file is 0 KB or tiny | Only the name or the start of the file was recovered | No; try the recovery again |
| Several recovered files show the same scene, or the wrong scene | Pieces of different recordings were mixed up | Only for the parts that belong together |
Before you repair: get the best possible recovery
- Stop using the card or drive. Every new photo, video or file can overwrite the deleted data.
- Recover to a different drive, never back onto the card you are recovering from.
- Try a recovery that reads the file system first. Many tools offer a quick scan that uses the file system and a deep scan that searches the content; free TestDisk, from the authors of PhotoRec, can undelete files with their names when the file system is intact. Copies found with their original names are usually the most complete.
- If the results are broken, try again with another scan mode or another reputable tool, while the card is still untouched. If the tool has an option to keep corrupted or partial files, turn it on: a partial file can still be repaired. For important footage, consider making a full copy (image) of the card first and scanning the copy.
- Keep every recovered file exactly as the tool produced it. Don’t convert, trim or re-save them before repair.
Repairing a recovered video
Repair can help when the video and audio data in the recovered file are intact and in order, and what is missing is the structure players need: the index with the list of frames and the duration. FrameRescue scans the file, finds the video and audio frames and rebuilds that structure. A short healthy clip recorded with the same camera and the same settings helps it match how that camera writes files.
Each result is decoded and checked before it is offered, and you pay €5.00 only if a repaired file is ready. If the recovered file mixes in data from other files, the result may be shorter than the original recording or jump where data was missing: repair saves what is there, it cannot recreate what was overwritten.
Not sure whether you need recovery or repair? See video recovery vs video repair.
Questions about recovered video files
Why are my recovered video files corrupted?
Recovery software often has to guess where a deleted file started and ended. Large videos are frequently stored in pieces, so a recovered file can miss its index, end too early or include data from other files. The bytes came back, but not always in the right order.
Can a recovered video that won’t play be repaired?
Often, if the recovered file contains the video data in the right order and only its structure is missing or damaged. If parts were overwritten or replaced by data from other files, those parts are gone and repair can only save what is left.
Should I run the recovery again?
Yes, if you still have the card or drive and have not written to it. Use a different scan mode or another tool, and recover to a different drive. A recovery that keeps the original file name and folder usually returns more complete videos than one that finds files by their content alone.
Why do my recovered videos all have numbered names?
When the file system records are gone, recovery tools find files by recognising their content and cannot know the original names. PhotoRec, for example, names them with a letter and a number, like f1234567.mp4, in folders called recup_dir. That kind of scan is also the one most affected by fragmentation.
Will repairing a recovered video bring back the missing parts?
No. Repair rebuilds the structure around the video data that exists. Frames that were overwritten or never recovered cannot be recreated, so a repaired video may be shorter than the original or jump at the places where data was missing.
Related repair guides
- Video recovery or video repair?
Deleted files need recovery; files that exist but won’t play need repair. How to tell which one you need.
- Fix “moov atom not found”
What the missing movie index means and why copy or faststart commands don’t rebuild it.
- Repair a corrupted MP4
Phones, action cameras, drones and dashcams: what “corrupted” usually means and what can be recovered.
- Video shows 0 seconds
0:00 with a large file size is usually repairable; 0 bytes is not. How to tell, free fixes and repair.
Recovered a video that won’t play?
Upload the original damaged file. A healthy clip from the same device is optional. FrameRescue checks the result before offering it, and you pay €5.00 only if a repaired file is ready.