Video repair guides
Practical guides to repair corrupted, truncated and unplayable MP4 and MOV videos: missing moov atom, black screen, audio out of sync and more.
How to fix a corrupted MP4 file that won’t play
Step-by-step guide to repair a corrupted MP4 video: quick checks, why MP4 files break, and how to rebuild the file online with the picture and sound in sync.Fix “moov atom not found”
Getting “moov atom not found” or a video that never finished recording? Learn what the moov atom is and how to rebuild it with a healthy clip from the same camera.Repair a corrupted MOV video
How to repair a damaged MOV file from an iPhone, GoPro, DJI drone or DSLR: common causes, what you can try yourself and how to fix it online.Video has sound but a black screen
If a video plays audio but the picture stays black, the video settings are usually damaged. Here is why it happens and how to restore the picture.Fix video and audio out of sync
Video and audio drifting apart or lips not matching? Learn why timestamps break and how to repair the timing of an MP4 or MOV file.
Step-by-step guide to repair a corrupted MP4 video: quick checks, why MP4 files break, and how to rebuild the file online with the picture and sound in sync.Fix “moov atom not found”
Getting “moov atom not found” or a video that never finished recording? Learn what the moov atom is and how to rebuild it with a healthy clip from the same camera.Repair a corrupted MOV video
How to repair a damaged MOV file from an iPhone, GoPro, DJI drone or DSLR: common causes, what you can try yourself and how to fix it online.Video has sound but a black screen
If a video plays audio but the picture stays black, the video settings are usually damaged. Here is why it happens and how to restore the picture.Fix video and audio out of sync
Video and audio drifting apart or lips not matching? Learn why timestamps break and how to repair the timing of an MP4 or MOV file.