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For the benefit of anybody else using that outdated document, the only change required is
channel=0
instead of channel=1
I have long been using the snapshot api, and recently discovered the width= and height= parameters to reduce the retrieved image size (and thus reduce bandwidth). For example, from an RLC-840A, the following works to get a 640x360 snapshot, which is about 32KB, compared to the full-size snapshot at 670KB
https://[camera-ip]/cgi-bin/api.cgi?cmd=Snap&channel=0&user=guest&password=[obfuscated]&rs=000000&width=640&height=360
However, when I try to reduce the dimensions further, below 640x360, the camera always returns a 640x360 image. I know I can rescale the image again at the browser, but is there a way to make the camera itself return a smaller image? I'm putting together a page with a dozen thumbnail snapshots that auto-refresh every 2 seconds, and it would be nice to have the camera return 160x90 snapshots directly and minimize bandwidth.
I'm trying to get a snapshot from a newly-installed RLC-520A using the CGI guide downloaded from the Reolink website. The camera returns an empty response with a 404 status code.According to the guide, the URL should be
http://[ip-address]/cgi-bin/api.cgi?cmd=Snap&channel=1&rs=000000&user=guest&password=[redacted]
I've created the guest user, and can verify the the camera recognizes the user because providing the wrong user and/or password returns
[ { "cmd" : "Snap", "code" : 1, "error" : { "detail" : "invalid user", "rspCode" : -27 } } ]
However, with the correct user and password, the response is a completely empty (0 data length) response with a 404 status code, as confirmed in the browser network console.So, what is the correct URL syntax to retrieve a snapshot?
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