Reolink camera streaming and Snapshots

Setting up ETH0 interface between camera and RPi

With the Reolink camera connected to my MacBook or over Wi-Fi, I found the streams had some latency. Going to try changing settings to see if we can improve this.

First a connection profile for the eth0 interface, which hands out the IP address 192.168.50.2:

[connection]
id=eth0
type=ethernet
interface-name=eth0
autoconnect=true
autoconnect-retries=0

[ipv4]
method=shared
addresses=192.168.50.1/30
never-default=true

[ipv6]
method=ignore

Converting the RTSP stream to WebRTC

To test with my UI, going to change the following file: /home/rpi/webcam_testing/RTSPtoWeb/config.json and include the link to the reolink RTSP stream instead of the WebCam one.

"streams": {
    "f29c576b-bbfb-449a-be5a-180fd0a7bedc": {
      "channels": {
        "0": {
          "url": "rtsp://admin:<password>@192.168.50.2:554"
        }
      },
      "name": "robot_feed_rpi"
    }
  }

Discovered the option in the settings on the app to change the resolution and frame rate of the camera. If we change the RTSP stream address, we can either take the clear stream or the fluent one. clear is the main stream, fluent is the sub stream. Fluent

"url": "rtsp://admin:<password>@192.168.50.2:554/Preview_01_sub"

Clear

"url": "rtsp://admin:<password>@192.168.50.2:554/Preview_01_main"

Using both so far we get a stream that performs well with low latency, might be a good option to remove the old webcam altogether.

http://192.168.50.2/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=wuuPhkmUCeI9WG7C&user=admin&password=password

Taking snapshots

We can also take snapshots from the command line as follows, they are of the higher resolution by default, but that is what we want:

curl -o snapshot.jpg "http://192.168.50.2/cgi-bin/api.cgi?cmd=Snap&channel=0&rs=wuuPhkmUCeI9WG7C&user=admin&password=password"