As per Avigilon website which says
"Avigilon HD NVRs also support a powerful feature called data aging. Data aging allows older surveillance to be stored at lower image rates and with higher compression to more efficiently use the available storage. With data aging the most recent time period, for example the most recent 2 weeks, of surveillance footage is recorded in the highest quality with the full image rate with low compression. As surveillance ages beyond a user defined threshold time the system will automatically manage the stored data to keep only half the frame rate and only a more compressed version of the image data. Storing the most recent surveillance footage in the highest quality allows for incident review immediately after an event occurs using the highest possible quality surveillance footage while allowing older surveillance to use less storage and keep archival storage durations high."
It says the old videos will be stored as a more compressed version of the image data.Is this actually true? Does the Avigilon Control Centre do a converting to a more compressed format?I am asking this because as per Avigilon Design Tool (See below screenshot),what i understand is that data aging is a technique where secondary stream recorded in lower resolution,quality and fps is stored simultaneously and after the first 2 weeks(as configured),the control centre just replaces the high quality stream with the low quality secondary stream.Please correct me if i am wrong.
So if this is true, then if a customer has a 5MP Camera and there is something he wants to review which took place a month back and hence stored in data aging in low quality/resolution/fps , then the whole point of keeping a 5MP camera is missed rite.
Isn't it a bit misleading what they say "system will automatically manage the stored data to keep only half the frame rate and only a more compressed version of the image data". They make it sound like the existing data is converted to higher compression and nothing much is lost, when actually there is a major loss in quality/resolution/fps in the secondary stream.
I am wondering if Avigilon itself recommends data aging to be implemented in places like Shopping Malls, Stadiums, Schools where events older that 2 or 3 weeks may be needed later without loss in image detail.
Whats the point if the video is available but quality is less? what is the point if frames are reduced and result in missing a fast movement like running.