When we fall back and turn the clocks from 2 am back to 1 am, what happens to the first recording from 1 am to 2 am?
I have a Dahua DHI-NVR5216-4KS2.
I have a Dahua DHI-NVR5216-4KS2.
Dahua bug - missing 1 hr recording - DST between 1am and 2am
- Thread starter ccb056
- Start date
alastairstevenson
Staff member
Remember: DO NOT ATTEMPT TO VIEW THEM AT THE SAME TIME! This creates an endless, time imbalance that can rip the shear fabric of space-time.
Man, I absolutely HATE staying up until 2AM twice a year to adjust my clocks!
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sebastiantombs
Known around here
I was going to say that I thought that hour showed up when we turn the clocks ahead again in the Spring 
So I opened up SmartPSS this morning, and this is what I see for 00:30:00 to 02:30:00:
Looks like I can only retrieve one of the two recordings from 01:00 to 02:00 - and I'm not sure which it is - the first or the second - today is 25 hours long, but SmartPSS is just showing it as a 24 hour day
Similiar with the webgui on the NVR:
However, the Google Nest cam is showing the 25 hour day, and allows me to view both 01:00 to 02:00 recordings:
Looks like I can only retrieve one of the two recordings from 01:00 to 02:00 - and I'm not sure which it is - the first or the second - today is 25 hours long, but SmartPSS is just showing it as a 24 hour day
Similiar with the webgui on the NVR:
However, the Google Nest cam is showing the 25 hour day, and allows me to view both 01:00 to 02:00 recordings:
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alastairstevenson
Staff member
This is from a Hikvision NVR when DST ended, last weekend. The hour repeats, and no alerts are lost.
The detail is a bit hard to see.
Yeah, that’s what the Google Nest does, and I was expecting the Dahua to do the same, but the Dahua doesn’t. DST is broken on both the Dahua nvr, and on the Dahua cams (I have SD cards in the cams and they don’t show both 1-2 am recordings either)
bigredfish
Known around here
Nope it’s a puzzlement.
Good news is nothing important happened during that hour as I waited till it was over to change the time
Good news is nothing important happened during that hour as I waited till it was over to change the time
Good point. Just checked my NVR and indeed I'm only seeing one period of 02:00 - 03:00. So I'm missing an hour of footage too...
@EMPIRETECANDY Is this something Dahua can solve in a (firmware) update?
This may become a less important issue since the EU want to abolish daylight saving time (DST)...
@EMPIRETECANDY Is this something Dahua can solve in a (firmware) update?
This may become a less important issue since the EU want to abolish daylight saving time (DST)...
bigredfish
Known around here
I guess if you were in some high security facility or somewhere where critical video footage may be needed many days/weeks/months after the fact it might be important. If so, I’d simply pick a time I’m going to change and archive the hour in question beforehand.
For the other 99% if home users, not sure it matters much ?
For the other 99% if home users, not sure it matters much ?
I would consider this a bug, not a lacking feature - the Dahua software clearly tries to support DST - yet it is buggy in the actual implementation
bigredfish
Known around here
Not disagreeing with you, just saying for the majority it’s probably a non issue. I still find bugs in Windows
Shockwave199
Known around here
Where does the meat go? The world may never know. I was just glad the nvr followed DST.
Just verified my cameras and NVR.
Same thing - 1 hour is lost.
That is just embarrassing!
@EMPIRETECANDY can you please report this bug to dahua?
We're losing 1h of recording!
Same thing - 1 hour is lost.
That is just embarrassing!
@EMPIRETECANDY can you please report this bug to dahua?
We're losing 1h of recording!