I have a Dahua XVR hybrid that uses IP and Analog cameras.
Question 1) What might be causing my Analog camera delay?
Question 2) What mode should I be using for max quality on my NVR: HD CVI, Analog, AHD, or HD TVI?
Thank you.
Issue 3) Also I have a weird issue with the resolution aspect ratio being wrong: my NVR only lists the camera res as 1296x1944 (tall) instead of 1944x1296 (correct widescreen). But 1920x1080 and under are listed correctly (widescreen).
![5mp AHD camera backwards ratio sm.png](/data/attachments/176/176611-ced98af1b1895b461b6fd1fbcc06e646.jpg)
Question 1) What might be causing my Analog camera delay?
- I had a low detail Analog camera setup (900 lines or something). Then I re-used the BNC cable to connect a new 5MP Analog camera (which has settings for HD CVI, Analog, AHD, and HD TVI. It was late and I didnt note what it was set to).
- But with the new 5MP cam connected, there is a 2-3 second delay. What causes this?
- Could it be the old BNC cable I re-used? (unknown quality/stats; Im not sure if there is a standard for BNC cables like there is for CAT5 vs 6?) . Because I also notice mild ghosting. And this happened for another install (when I used old unknown quality cables that worked for the older/lower quality camera, instead of the new BNC cable that came with a newer Analog camera).
- But before I run new BNC cable, I wanted to check with you guys.
- I also changed the Encode from 5MP to 4MP, but the feed was still delayed.
- Update partial answer: Per Bigredfish, I changed from AI coded to Smart codec, which gave better detail. And if I change from H.265 to H.265h - then I get less lag. But today (after change to Smart codec), I get less lag then yesterday with H.265. Thanks guys.
- So the remaining question is if my old cord is causing ghosting? And what "Type" I should set [General, Motion, Alarm?] (underneath the codec setting).
Question 2) What mode should I be using for max quality on my NVR: HD CVI, Analog, AHD, or HD TVI?
- Update partial answer: the factory default was HD-TVI - allowed me to change to 5MP-N. But when I switched to HD-CVI, 5MP-N was no longer an option, only up to 4M-N. (Bigredfish answered below that Dahua cameras use HD-CVI. But my camera isnt a Dahua. And I may not need the 5MP-N. So im testing 4 for now.)
Thank you.
Issue 3) Also I have a weird issue with the resolution aspect ratio being wrong: my NVR only lists the camera res as 1296x1944 (tall) instead of 1944x1296 (correct widescreen). But 1920x1080 and under are listed correctly (widescreen).
![5mp AHD camera backwards ratio sm.png](/data/attachments/176/176611-ced98af1b1895b461b6fd1fbcc06e646.jpg)
- Im waiting on a reply from the camera seller. But if anyone knows about this or if it's related to Q1 or Q2, please say. Ty.
Last edited: