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Most current video cameras use memory devices for storage.  These can have a capacity from a few GBs upto 32GBs, though this figure will probably double every year or two.

Memory chips are often reliable, but have two major problems

• FAT32 chips when deleted lose all fragmentation details
• Chips can be corrupted when moved between devices - eg camera to main computer

With memory chip video, there are several types of video file formats and several variations.  In particular, there are multiple ways that data is stored which often results in fragmented files.

The main types of video format are as below

• MPEG - see notes on mini-DVD
• AVI
• 3GP, MP4, Quick time format
• AVCHD - high definition

The 3GP format is very popular with phones, AVI with compact digital cameras, and AVCHD with new high definition cameras and video recorders.  They all need recovering in different ways, and CnW has many tools to assist, in particular with the fargmented files.  Cnw can also recover from some MP4 files that have not been finialised.