You filmed all day, got home, clicked the file and saw "the file is corrupted" or "cannot play this format". There are four main reasons a video file won't open: the recording or transfer was interrupted, the memory card failed, the format or codec isn't supported, or the file header is damaged. The important point: a file that won't open doesn't mean the content is gone. In many cases the data is still there and only the "entrance" is broken. This page explains how to tell what's wrong, and what you should never do.
First: format problem, or damaged file?
Incompatible format or codec. The file itself is fine; your player just doesn't understand it. Try a player with broad format support, or convert the file. This is the lucky case.
The file really is damaged. Typical situations: the camera ran out of power or crashed mid-recording (the file was never "closed" and the header is incomplete), the memory card or USB drive was pulled out during transfer, or the card or drive has bad sectors. These files need repair tools that rebuild the header or extract the audio and video streams, and there is a real chance of recovering them.
Three things never to do
Don't keep recording onto the same memory card. If the card is the problem, new writes can overwrite data that could still be saved.
Don't download random "repair software". Apart from the security risk, a wrong repair attempt can make the file's condition worse.
Don't delete files that "look broken". Zero-byte files, files with no preview, files with odd extensions: all may still be recoverable. Leaving them as they are is the safest choice.
How professional repair works
Step one is diagnosis: analyzing the file structure to see whether it's a damaged header, an interrupted stream or a storage problem. Step two is repair: a common method uses a healthy file from the same device as a reference to rebuild the damaged file's header so players can read it again. Step three is verification: checking that picture and sound are complete and whether any sections are missing. Honestly, the success rate depends on the type and extent of the damage, and nobody can guarantee a result before analyzing the file. That's why the professional process is always: receive the file, diagnose it, then confirm the next step and the cost with you.
Frequently asked questions
What do you need for a repair?
The damaged original file and, importantly, a healthy file recorded on the same device. If possible, tell us the device and what happened.
The file is huge. How do I send it?
Through a cloud link such as Google Drive. For very large files or special privacy needs, we can discuss another method.
Contact Chipscat Studio
If a video won't open, don't panic and don't delete it. Tell Chipscat Studio what happened and we'll help diagnose it and assess the chance of recovery. You decide whether to go ahead. See the video and audio repair service.
