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The problem was caused by the 2nd stream. See my last post.

Problem solved: I reduced the 2nd stream (MJPEG) used for preview in resolution and framerate. This reduced server interface load so that the main stream (h.264, 3MP, 15fps) is no more affected.

Yep, it's set to 15 right now and this works good enough

It's a raspberry pi 3 plus extra disk for recording. The vendor of the software claims it's capable of up to 11 FullHD cameras. I have 4x 3MP cameras. Maybe it's just too weak. With the current settings, the problem is occurring only from time to time. Maybe I'll switch to a faster PC, maybe not.

This might be the cause. I'm checking with the vendor.

Switching to 4096 and h.264 put's almost 100MBit load on the servers interface. Since the server only has a 100Mbit interface, this is too much. I'd prefer h.265 over h.264. Using h.264 doesn't solve the problem, anyway. I already tested that. I put the iframe interval to the same as the fps.

I don't know if the cable is CCA. It's a cat7 infrastructure build by a professional company, quality assured by measurments. I don't think it's the network. Here's the settings: I'll try to switch to cbr.

Structured Cat7 Ethernet cable system, connected to Cisco 2960-24/48 Switches with 1G backbone.

Correction: it got better but it's no fixed completly

Yepp, this fixed it! Thank's a lot!

The problem is here in the Hikvision forum: https://www.ipcamtalk.com/showthread.php/14110-Best-full-res-stream-URL-with-h-254-or-hevc-on-2CD2635F Maybe it isn't a problem, I don'T know. In this thread I just wanted to ask if it's different with Dahua, because it could give those cameras a try.

Well, this is okay, as long as the firmware version is running fine..... Anyone ever contacted support of Dahua?

Hi folks, I experiences problems with Hikvision when it came to firmware and support. As discussed in the Hikvision-subforum in a lot of threads, Hikvision has an annoying regionalization strategy with its firmware which makes it hard to upgrade. Plus, if you need support, they don't help you...

Hi folks, I recently got 4x 2CD2635F. The cams are great but if I chose the high-res stream (#1) either with h.264 or h.265, from time to time the picture is distorted (grey/green). It might be that my software (Xeoma Pro) does not take the correct URL for streaming. The software detects...