Multi-cam replay - the best way to watch an entire day.

victor_diago · Post by **victor_diago** » Fri May 14, 2004 7:40 pm

hi phil..

i have seen this on many surveillance systems, i think this whould be easy to add to zoneminder.

this mode of view is like montage.

for example. you click in ReplayMontage option. then one screen with X monitors (all they at this time black) are showed in the screen.

then you make a filter with JUST date and time as fields.

so i can select for example, TODAY, After 15:00. then i click
submit and all the monitors show the images that they captured today after 15:00 in a sequential way. if you have monitors in record, it will just play all the events. if you have modect, when, in this lack of time , it has generated some event, the events are shown in the screen, when no event is detected, for example at 15:10, a blue screen might appear, while the record monitor still showing their events.

so this is a way to view all cameras (like in montage) but in events mode.

i think this is useful because, you can find something more easily when you have the view of what all the cameras detected at the same time. its more easy , for example, to follow someone which walk between all the cameras, you know the direction he walked, so you just move your eye to the other monitor.

what do you think ?

victor diago

jameswilson · Post by **jameswilson** » Wed Nov 30, 2005 1:44 pm

id like to incorporate this into the windows app.
I agree that it would be nice, but i think you need to limit the number of cams to playback.
It is possible but have you had any thought as to how to keep the replays syncronised. If you just play events from 4 tables they will all get out of sync.
Maybe a sql query per event ie
cams 1-4
query for cam 1-4 for 15:00:01 1/1/05 etc
display all images
requery for 15:00:02 1/1/05 and so on
Couple of things
a) dont know how to raise such a query
and
b) is this sort of load acceptable.

Onve you had found the relevents event(s) you could replay in normal mode which would show all images not 1 second snapshots

And this 1 second would need to be a varibale so it could be
1, 5, 10,30,60 seconds??

James