FileFix vs MP4Box for corrupted MP4 repair.
Try MP4Box first when it can import the damaged file and write a clean container. In our testing on real-world corrupted videos, FileFix fully repaired about half; MP4Box remux more often produced a partial result than a full repair.
Try FileFix freeWhat the test found
| Approach | Full repair | Partial repair | Failed repair |
|---|---|---|---|
| FileFix | 59% | 3% | 38% |
| MP4Box remux | 9% | 33% | 58% |
Source: Our own testing on real-world corrupted video files. Values are the share fully repaired, partially repaired, or not repaired.
Try the free tools first
Import into a new MP4 container
MP4Box -add broken.mp4 -new repaired.mp4When the free tool is the right answer
Try the free option when
- Use MP4Box when it can parse the input and the job is to place readable tracks into a new MP4 container.
- It is free and runs locally on your computer.
Try FileFix when
- Try FileFix when MP4Box cannot import the damaged file or when you want a free watermarked preview before deciding whether to pay.
- Neither option can rebuild footage that was never written.
Repair guides
Questions
Yes. If MP4Box can read the tracks, writing them into a new container is a useful free first step.
No. The command imports readable tracks into a new MP4 container rather than asking you to choose new video and audio codecs.
See what's recoverable.
Preview the repaired video before you decide.