Recording showing as black screen for axis cameras

Hi, Community!

This topic introduces to you a solution about recording show as a black screen for AXIS cameras.

Issue Description

The customer reported that playback is showing black screen with the AXIS camera.

Handling Process

1. Checked whether there was data transferred by click on the info button of the image. discovered that there is data passing through
   

2. Checked live video for the same camera.

   Found out that only secondary1 has the image.
   

3. Checked PU parameters and found out that only when transport protocol is UDP, there has an image.
   

4. From the recording policy, found out that the recording is based on a primary stream which doesn't have the image.
   

5. Set recording policy to secondary1 and tested. then the recording is normal 
   

Root Cause

AXIS connected to VCN540 via ONVIF, based on AXIS camera current setting, only supports UDP transmission and H264.

Solution

1. Set transfer protocol to UDP and H264.

2. Stop recording then restart recording.