MISCOMPARE reply when sending a large packet - IP CAMERA

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NoAIm1337

NoAIm1337

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Nov 6, 2014
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Hey Community,

I am running into an issue with an IP camera connected to a network. I am unable to pull live video feed through a NVR. I can access the web interface of the camera just fine. As a matter of fact, the NVR software itself shows a green light that the camera is connected, it just will not show live feed.

besides the normal troubleshooting with making sure we are using the correct URL path for pulling the live feed into the NVR software (which i have confirmed is correct via the manufacture of the cameras user manual), i run into a miscompare reply when i try to send the camera a large packet (ping -t -l 1028 x.x.x.x). The miscompare happens after more then 726 bytes are sent. Would this be an issue as to why i might not be able to pull live video from the camera? what exactly is this issue? microsoft's answer is short and sweet without much explanation. I'm wondering if the community can help me. Thanks in advance.
 
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kanewolf

kanewolf

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May 29, 2013
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What model camera? Are you sure the camera is a supported model for the NVR? What protocol are you using to "pull" video from the camera?

I doubt that the ping has anything to do with your problem. It is probably a limitation of the camera. An extended size ping packet may not have been designed into the IP stack.

Can you stream a live feed in the web interface from the camera?
 
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NoAIm1337

NoAIm1337

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Nov 6, 2014
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The camera in question is an Arecont Vision AV1300. The camera is supported by the NVR.
The AV1300 camera does not support rstp (h.264). I am getting live video in the web URL because it is accessed over HTTP on Port 80 and uses MJPEG. The NVR software is trying to use Port connection on 554 for RTSP by default.
Because this camera only supports MJPG, built in the NVR software there are alternatives for accessing live video. I've been trying to use both the Arecont JPEG ClientPull and the MJPEG ServerPush. This is basically code in the software to pull the different types of compression of live video that isn't rstp via a URL. I've also tried a universal driver ONVIF for viewing the video (still nothing). I pulled the URL directly from Arecont's user manual as to what URL to use "http://ip_address/img.jpg". Even with that inputed in I am not getting video feed.
This lead me to think because of the miscompare maybe it's a network issue? the miscompare only seems to happen with this specific camera. there are 4 other cameras on the network and i can shoot a large packet to them just fine (the other cameras are working fine).

 
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