Not sure why you don't think it is motion. I've got motion running at home and it has the same stupid locate frames that always seem to be where the movement used to be ("locate on" configuration option) and the default configuration places the identical timestamp in the lower right corner.

Sending the images off-site is probably done by the 'onsave' external program hook, which is passed the image filename as an argument. So that script could be as simple as
Code:

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  #!/bin/sh
  mpack -s"motion" $1 my-email(at)offsite.address

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