core: Reolink RLC-820A camera entity cannot play video stream

The problem

Hi folks,

I’m facing an issue when using the Reolink integration with an RLC-820A camera, details as follows:

Firmware: v3.0.0.124_20112601 Hardware: IPC_523128M8MP

Essentially what is happening is the integration works correctly, the camera can be added and everything appears to work as you would expect. However, when viewing either the ‘main’ or ‘sub’ camera entities only a preview image is shown, and the video stream never starts.

Viewing the logs, there appears to be 404 / “Not found” errors; these errors persist when either using RTMP or RTSP.

My suspicion is that for this particular camera the integration is using the wrong URL for accessing the stream, this is documented in the following post - https://www.reddit.com/r/reolinkcam/comments/kziu4t/820a_no_substream/. For the ‘main’ stream, I have replicated the behaviour in VLC by trying the h264 path (which returns an error) and the h265 path which works. When looking at the logs, it appears the integration is trying to access the h264 path on the main stream, which doesn’t exist for this camera.

My confusion comes with the sub stream, which suffers from exactly the same issue (preview only, stream won’t play). The sub stream does in fact have a h264 path which is confirmed to work with VLC. When viewing this camera entity, there are no errors produced by the integration, the stream just sits there frozen. If I leave the preview open for some time (1-2 minutes) I do start to see the following logs which confusingly refer to the main URL:

2023-01-11 11:12:49.894 ERROR (stream_worker) [homeassistant.components.stream.stream.camera.living_room_camera_main] Error from stream worker: Error opening stream (HTTP_NOT_FOUND, Server returned 404 Not Found) rtsp://:@192.168.4.45:554/h264Preview_01_main 2023-01-11 11:13:11.479 ERROR (stream_worker) [homeassistant.components.stream.stream.camera.living_room_camera_main] Error from stream worker: Error opening stream (HTTP_NOT_FOUND, Server returned 404 Not Found) rtsp://:@192.168.4.45:554/h264Preview_01_main

I’m not sure if this is caused by the sub stream entity switching to the main stream, or just coincidence caused by some other background polling.

Please let me know if there is any further debug information I can provide to help diagnose this one!

What version of Home Assistant Core has the issue?

2023.1.2

What was the last working version of Home Assistant Core?

N/A

What type of installation are you running?

Home Assistant OS

Integration causing the issue

reolink

Link to integration documentation on our website

https://www.home-assistant.io/integrations/reolink

Diagnostics information

Not possible for this integration

Example YAML snippet

N/A configured via the UI

Anything in the logs that might be useful for us?

(When using RTMP)

2023-01-11 10:46:26.438 ERROR (stream_worker) [homeassistant.components.stream.stream.camera.living_room_camera_main] Error from stream worker: Error opening stream (EOF, End of file) rtmp://192.168.4.45:1935/bcs/channel0_main.bcs?channel=0&stream=0&user=****&password=****
2023-01-11 10:55:41.000 ERROR (stream_worker) 

(When using RTSP)
[homeassistant.components.stream.stream.camera.living_room_camera_main] Error from stream worker: Error opening stream (HTTP_NOT_FOUND, Server returned 404 Not Found) rtsp://****:****@192.168.4.45:554/h264Preview_01_main

Additional information

No response