Dahua Smart H.264+ Tested
Author: Ethan Ace, Published on Aug 17, 2016
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Comments (9)
Undisclosed Manufacturer #1
I assume this works by dynamically increasing the GOP for periods when there is no motion. When the camera is in such a period and has not sent an I-frame for some time, and suddenly there is a certain amount of motion then will it break out of this mode and send the next I-frame?
I ask this because I am wondering if smart codecs have any impact on VMS products that have an I-frames only option on their server based VMD.
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Andrew Del Biondo
Reducing bandwidth is great but are there any compromises in picture quality when there is scene change? We have found various Dahua IP camera models lately to be no longer viable to record in VBR due to unacceptable compression artefacts. An example, is the DH-IPC-HDBW2320R-ZS. At 1080p resolution, 6 FPS, VBR capped at 1920Kbps and quality 6 the bit rate doesn't kick up when the scene is complex and changing, staying at around 500Kbps, so picture quality is unacceptable. Can IPVM do some tests on this model which include scene change to prove or disprove this issue?
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Undisclosed #2
Ethan, what was the client used for this test?
There is a claim that Dahua h.264+ requires an update to their NVRs as well as the cameras to work. I assume that non-Dahuan gear wouldn't work therefore. Can you confirm or deny?
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