Can you elaborate? What is a till? How far out of sync is it? Is there significant latency?
Talking about a cash register feed as overlay text onto the CCTV image. I have looked at this before but was under the impression that in most cases it is a problem as the time stamp on the DVR gradually moves away from the time stamp on the POS. So a transaction will show as say 10am on the POS but 10.05 on the CCTV image making it dicey for evidential purposes. As well not sure if the data stream on a HD-SDI system is capable of having the POS transaction details added to it
Hope this helps
Mike, I'm not sure when you last looked at overlays, but time drift is a thing of the past. ;) Both systems, the dvr and the pos video overlay device, should be set for ntp (network time protocol) operation, which will insure the data timestamp matches the video timestamp.
Natively overlaying the sdi stream at the overlay device on the other hand, seems unlikely. Is it a hybrid DVR, with some analog ins as well?
I'd disagree that time drift is a thing of the past (unless that was a joke). It's a problem in a lot of systems. It's relatively simple to manage, as running a time server is easy enough, and syncing the POS terminal and server (if any) as well as cameras (if they're IP) and recorders regularly (I do it every hour because why not?) should keep things showing really close times. See this for more info: Resolving IP Camera / VMS Time Sync Problems
As far as overlay, I'm still seeing lots of DVRs with RS-232 ports on the back of them. So you may be able to overlay POS data that way. I haven't seen any HD-SDI text inserters, but I also really haven't looked much, and they're likely going to be very expensive.
has been a while since I had a look at it I was aware of the NTP server possability but have previously just advised clients against the whole issue if it was raised and have found that they are quite happy with that. Am meeting with a person tommorow who is intrested in covering three shops and was reffered to me by a contact who sells eftos systems hence the intrest with combining the two. I have also been looking at the HD-SDI option raised this with the local Hikvision suppliers but they seemed a bit unsure of just what the system could and couldn't do. When I previously looked I was selling mainly Bosch analoge systems which the suppliers advised Bosch didn't do the text overlay because of the timeing issues. The Hikvison suppliers have since come back and said they can possibley write the intergration specific to the customer needs but need more info. This sounds like a bit of a mess in the making to me and would rather go with a proven solution
Norris, Inc., S. Portland, ME | 05/21/14 09:53pm
AVE VSI Pro. Serial input-text ouput combined with analog camera (you said it was a DVR). i am usually high tech, but this technique has been used for 10-20 years. Not sure if the receipts are from parallel, serial, or IP printers. Trying to not over engineer this. (I would normally use an IP serial server and NVR software solution to capture ASCII and create serial event profile, but I am still not sure as to the register-printer-system setup).