Canon ZR400 Instruction Manual page 82

Depending on the signal sent from the connected device, the conversion from
analog to digital signals might not work properly (e.g., signals that include
copyright protective signals or anomalous signals such as ghost signals).
For normal use, set [AV DV] to [OFF]. If it is set to [ON], digital signals cannot
be input via the camcorder's DV terminal.
Depending on the software and the specifications of your computer, you may
not be able to transfer converted signals via the DV terminal.
We recommend powering the camcorder from a household power source.
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