Setting up NetTime Time Sync Tool on Windows 10

Excellent. Thank you, this is what I needed. I do have mine set up with a second subnet also for the same reason.
Greatly appreciate the response and such clear instructions. I will work on getting this installed today.
 
bp2008 said:
I always recommend having the camera embed its own timestamps, and to disable Blue Iris's timestamp overlay that it adds by default. This way Blue Iris won't need to recompress the video to add timestamps, so your clip exports are much faster and retain their original quality.

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Done! I have gained so much value from this site. Great appreciation for all.
 
The below video is a comparison with Blue Iris using two different date/time displays. The top number is the BI overlay. The other, with yyyy/mm/dd, is the date/time from a Dahua camera using the camera's embedded time stamp.

As pointed out above, there is a performance hit when using the BI overlay in place of the camera embedded time stamp. On the positive side, all the cameras will display the same time when using the overlay as they are no longer dependent on camera time updates.

When using the camera embedded time stamp, camera time drift becomes important. Some cameras require an update interval every 24 hours while others may require updates every 10 minutes. Many of the older cameras allow for a 0-30 minute interval selection range with newer models up to 24 hours.

There has been some discussion on overlay vs embedded for legal purposes. With one being accepted while the other has not. This is just a point of interest as have no first hand experience to validate either.
 

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Alaska Country said:
The below video is a comparison with Blue Iris using two different date/time displays. The top number is the BI overlay. The other, with yyyy/mm/dd, is the date/time from a Dahua camera using the camera's embedded time stamp.

As pointed out above, there is a performance hit when using the BI overlay in place of the camera embedded time stamp. On the positive side, all the cameras will display the same time when using the overlay as they are no longer dependent on camera time updates.

When using the camera embedded time stamp, camera time drift becomes important. Some cameras require an update interval every 24 hours while others may require updates every 10 minutes. Many of the older cameras allow for a 0-30 minute interval selection range with newer models up to 24 hours.

There has been some discussion on overlay vs embedded for legal purposes. With one being accepted while the other has not. This is just a point of interest as have no first hand experience to validate either.
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Thank you for this info.
Do you remember which one was reportedly accepted vs not? My current assumption is that the NTP Server (Nettime) would be the accepted one.
 
bbwolfe said:
Thank you for this info.
Do you remember which one was reportedly accepted vs not? My current assumption is that the NTP Server (Nettime) would be the accepted one.
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When you export video, if you are having BI add the time, you are re-encoding the video, and that is inefficient and takes more storage than not re-encoding and depending on the size of the export, could take a long time.

The biggest reason not to use the BI overlay though is that the attorney and law enforcement members here have said that having BI add the overlay constitutes a manipulation/modification/altering of the video after the fact and in a lawsuit, a good defense lawyer would claim the video has been altered to try to get it dismissed in court.

The reason being you could overlay any time you want on it after the fact.

Sure a camera could have the wrong date and time too, but that cannot be altered after the fact.

It would suck to have great video of a crime and have it tossed on a technicality.
 
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wittaj said:
When you export video, if you are having BI add the time, you are re-encoding the video, and that is inefficient and takes more storage than not re-encoding and depending on the size of the export, could take a long time.

The biggest reason not to use the BI overlay though is that the attorney and law enforcement members here have said that having BI add the overlay constitutes a manipulation/modification/altering of the video after the fact and in a lawsuit, a good defense lawyer would claim the video has been altered to try to get it dismissed in court.

The reason being you could overlay any time you want on it after the fact.

Sure a camera could have the wrong date and time too, but that cannot be altered after the fact.

It would suck to have great video of a crime and have it tossed on a technicality.
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Wow! Great explanation. Thank you!
 
wittaj said:
The biggest reason not to use the BI overlay though is that the attorney and law enforcement members here have said that having BI add the overlay constitutes a manipulation/modification/altering of the video after the fact and in a lawsuit, a good defense lawyer would claim the video has been altered to try to get it dismissed in court.
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I don't know if that actually ever happens. I did share video with cops once about an event that was unrelated to me or my property, but my cameras had seen their suspect. A year later the case went to trial where I was brought in as a witness. The prosecutor showed the video clips to the jury and had me verbally explain how the recording system works and testify that it was performing reliably at the time in question and state that I believed the video was an accurate representation of the real events. He asked specifically about the accuracy of the timestamps but not about how they were encoded. The defense attorney (public defender probably) did not challenge any technical aspect of the video.

I think the average person, jury member or attorney alike, has no real concept of how CCTV encoding works besides "magic box records video". So I think an attorney is unlikely to ever ask at what stage of the recording process the timestamps were rasterized into the video image. And if it did come to that, they would be more concerned with you swearing under oath that the timestamps were accurate, and less concerned about how the timestamps were stored on disk at the time when the cops arrived.
 
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