Very interesting point, im looking for the same VMS for that exact reason.
Except in my case, it is a suggestion by one of the hotels, to delete the video of VVIP guests and their activities.
I only know of the "find the directory and delete the file" method, thought I don't personally know anyone who has done that, or been accused of such. I have no experience trying to do this with a VMS, but I know with some older PC Based DVR software it was a little difficult to tell which file was for which date as it wasn't very obvious. Seemed like a bunch of random number not referencing a date or anything.
I know that you could cut the file out from the storage folder to a video editing software that would allow you to clip out specific scenes. And, then replace the file back to the folder.
But that is manual task, im not aware of any VMS that allows for that function. It kind of defies the purpose of a VMS .
EZWatch Pro 4.0 will allow this
IPVMU Certified | 11/25/13 08:22pm
Sound like a reason not to use a VMS that uses the operating file system technique for storage and indexing (creating folders and subfolders and "chunks" of video clips) if that is a real concern. Rather, a VMS that uses proprietray of other types of actual database container files that cannot be tampered with easily or not make it obvious it was.
To be clear, this is to keep someone like a system user or maybe an administrator from "selectively" deleting a portion of the database (and maybe claiming it was a temporary glitch or system fault and avoiding the activity being logged). Theoretically though anyone with administrative or even physical access to the system could delete all of the database file(s) if they knew what they were. And even for systems that store video in proprietray container database files, I know that some will mark those portions of the database that have video from a particular camera will mark it as free space when that camera is deleted. Maybe that video could be retrived or not if that happened.
I guess this conversation underscores the need for good physical security of the recording system.
Do most systems place a time stamp on the stored video? Either thru the Camera or the VMS?