Bisqwit's FCM repairer

Have you accidentally loaded a bad quicksave that truncated your 15-minute FCEU movie to 30 seconds?

This tool may help you.

You need:

The FCM file you were making, but which is now damaged.
Your latest backup file of the FCM! The backup file must contain enough data to replace the bad section of your current movie. (For example, if your damaged file is 1 second long, the backup file must be at least 2 seconds long.)

From these parts, it will hopefully reconstruct the full movie.

Algorithm employed by this tool:Copy header from NEW
Copy destroyed region from BACKUP
Copy rest from NEW
Recalculate frame count and put it into header
 "Destroyed region" is everything in the NEW file up until
 a long enough piece of common context is found to match
 between the NEW and the BACKUP file.

It works, because FCEU never actually truncates the file.
It contains data beyond the movie stream end. This tool
just uses the backup file to patch the movie back into
good condition.

Written by Joel Yliluoma

Select your broken FCM file:
Select your latest backup FCM file:
Minimum matching length of common context:	bytes

Press this button to let the server generate a repaired FCM for you.