Name: VidRepair
Author: VidRepair

TL;DR

To fix a corrupted video file: Download VidRepair → Select your corrupted file → Click Repair → Preview and save. Works for MP4, MOV, AVI, MKV and other formats. Completely free and offline.

Quick Diagnosis

Before attempting repair, check if your file is recoverable:

Sign	Recoverable?
File size is normal (100MB+)	✅ Likely yes
File shows 0 bytes	❌ No
Error: "MOOV atom not found"	✅ Yes
Error: "Invalid header"	✅ Usually yes
Video plays partially then stops	✅ Yes
File won't copy ("cyclic redundancy")	⚠️ Maybe, try recovery first

Method 1: VidRepair (Recommended)

Best for: All corruption types, works offline, no file limits

Why it works: VidRepair reconstructs missing or damaged container metadata (the index that tells players how to read your video). The actual video data usually survives corruption, it's the index that breaks.

Steps:

Download VidRepair from vidrepair.com (free, no signup)
Launch the app: no installation required
Select your corrupted video file
(Optional) Add a reference file: a healthy video from the same camera dramatically improves success rates
Click Repair: typically takes 2-10 minutes depending on file size
Preview the result before saving

Success rate: ~85% for typical corruption, 95%+ with a reference file

Pro tip: If repair fails, try again with a reference file. Same camera model, similar settings.

Method 2: FFmpeg (Command Line)

Best for: Technical users, batch processing

If you're comfortable with command line tools:

# Basic remux attempt
ffmpeg -i corrupted.mp4 -c copy fixed.mp4
 
# Force rebuild index
ffmpeg -i corrupted.mp4 -c copy -movflags faststart fixed.mp4

Success rate: ~30%, powerful but requires understanding the corruption type

Method 3: VLC Media Player

Best for: Quick test, very minor issues

Open VLC → Media → Convert/Save
Add your corrupted file
Select output format and click Convert

Limitation: VLC cannot fix missing MOOV atoms or severe corruption. It's a player, not a repair tool.

Success rate: ~20%, only for minor container issues

What Causes Video Corruption?

Understanding the cause helps determine if repair is possible:

Cause	Repairable?	Notes
Recording interrupted	✅ Usually	MOOV atom incomplete
Transfer interrupted	✅ Usually	File truncated
SD card failure	⚠️ Maybe	May need file recovery first
System crash during save	✅ Usually	Similar to interrupted recording
Physical media damage	❌ Rarely	Need professional recovery
Virus/malware	⚠️ Varies	Depends on what was damaged

When Repair Isn't Possible

Some files cannot be fixed:

Zero-byte files: No data to recover
Severely truncated files: Video data missing, not just metadata
Physical media failure: Storage is damaged
Overwritten data: New data replaced the original

Prevention Tips

Use quality SD cards: Cheap cards fail more often
Don't fill cards completely: Leave 10-20% free space
Eject properly: Always use "Safely Remove"
Keep batteries charged: Avoid mid-recording shutdowns
Backup important footage: Copy to multiple locations

Supported Formats

VidRepair can fix corrupted files in these formats:

MP4: Most common, best repair support
MOV: Apple format, same repair approach
AVI: Older format, good recovery rates
MKV: Matroska container, fully supported
3GP: Mobile format, supported
WebM: Web format, supported

Need More Help?

How to Fix Corrupted MP4 Files on Windows: Detailed MP4 guide
MOOV Atom Explained: Understand why files break
Reference File Repair: Advanced repair technique
Free Video Repair Tools Compared: Tool comparison

How to Fix Corrupted Video Files (Free, 2026 Guide)