Argus 4 Pro fw 25060601 — connect/auth/identify OK, no stream pull (DESCRIBE 404)

[MindCanCHH]

Describe the bug

On a Reolink Argus 4 Pro running firmware v3.0.0.4978_25060601 (June 2025), neolink 0.6.3-rc.3 successfully completes discovery, authentication, and model identification, but never starts a stream pull from the camera. The GStreamer RTSP server announces the stream as Available at /argus/main, /argus/Main, /argus/mainStream, …, /argus, but every DESCRIBE to any of those paths returns 404 Not Found — both directly (rtsp://127.0.0.1:18554/...) and via a proxy (go2rtc 1.9.14, which logs wrong response on DESCRIBE).

After the model-identification line, the neolink log goes completely silent — no Building Pipeline, no streaming start, no errors. So the factory is registered with the URL paths but never receives media to describe.

This may be related to #325 (Argus 4 PIR control fails — same camera class, similar partial-implementation symptom).

To Reproduce

1. HA OS 17.2 (Raspberry Pi 4, aarch64), running the dm82m/hassio-addons neolink-latest add-on (App version 0.1.1, neolink 0.6.3-rc.3, mode rtsp, log debug).

2. Configuration file (/addon_configs/<slug>_neolink-latest/neolink.toml):

   bind = "0.0.0.0"
   bind_port = 18554
   
   [[cameras]]
   name = "argus"
   username = "admin"
   password = "<redacted>"
   uid = "<redacted>"
   discovery = "local"
   idle_disconnect = true
   push_notifications = false
   print_format = "Human"
   stream = "mainStream"
   
   [cameras.pause]
   on_motion = true
   on_client = true
   timeout = 2.1

3. Start the add-on. Camera is reached via local UDP broadcast, login succeeds, model and firmware are reported.

4. From any RTSP client (ffprobe, nc-driven hand-rolled DESCRIBE, go2rtc as upstream proxy), DESCRIBE any of the announced paths.

   $ printf 'DESCRIBE rtsp://127.0.0.1:18554/argus/main RTSP/1.0\r\nCSeq: 1\r\n\r\n' \
       | nc -w 5 127.0.0.1 18554
   RTSP/1.0 404 Not Found
   Cseq: 1
   

Expected behavior

DESCRIBE returns 200 OK with an SDP describing the H.264 (or H.265) stream from the camera, and SETUP/PLAY enable consumption — same flow that works for the older Argus models.

What I've already tried

• push_notifications = false — silenced the FCM retry storm completely (thanks for the workaround in Registering new push notification token: Error("missing field token", line: 7, column: 1) }) #288). No effect on the stream pull.
• [cameras.pause] block with on_motion = true, on_client = true, timeout = 2.1. No change.
• Multiple path variants on DESCRIBE: /argus, /argus/main, /argus/Main, /argus/mainStream, /argus/MainStream, /argus/Mainstream, /argus/mainstream. All return 404 Not Found.
• Confirmed via netstat that neolink is bound and listening (port 18554 IPv4 localhost, 18555 IPv6 dual-stack).

Sanitized log excerpt (post-restart, clean — push_notifications=false already applied)

[INFO  neolink] Neolink 6e05e7844b5b50f89787d30bffcbbd3471bfcfde release
                neolink version: neolink 0.6.3-rc.3
                neolink mode: rtsp
                neolink log: debug
[INFO  neolink::rtsp] argus: Rtsp Starting
[INFO  neolink::utils] argus: Connecting to camera at UID: <redacted>
[INFO  neolink_core::bc_protocol] argus: Trying local discovery
[INFO  neolink::rtsp] Starting RTSP Server at 0.0.0.0:18554
[DEBUG neolink::rtsp::gst::factory] Constructing Factor Impl
[DEBUG neolink::rtsp::gst::factory] Adding anonymous as permitted user
[DEBUG neolink::rtsp] Path: /argus/main
[DEBUG neolink::rtsp] Path: /argus/Main
[DEBUG neolink::rtsp] Path: /argus/mainStream
[DEBUG neolink::rtsp] Path: /argus/MainStream
[DEBUG neolink::rtsp] Path: /argus/Mainstream
[DEBUG neolink::rtsp] Path: /argus/mainstream
[DEBUG neolink::rtsp] Path: /argus
[DEBUG neolink::rtsp] argus: Preparing at /argus/main, /argus/Main, /argus/mainStream, /argus/MainStream, /argus/Mainstream, /argus/mainstream, /argus
[DEBUG neolink_core::bc_protocol::connection::discovery] Direct connect success at 255.255.255.255:2015
[INFO  neolink_core::bc_protocol] argus: Local discovery success <redacted>
[INFO  neolink::utils] argus: Logging in
[DEBUG neolink_core::bc_protocol::login] Populating abilities
[DEBUG neolink_core::bc_protocol::abilityinfo] Abilities: <AbilityInfo><userName>admin</userName>... (full list available on request)
[INFO  neolink::utils] argus: Connected and logged in
[INFO  neolink::common::camthread] argus: Camera time is already set
[DEBUG neolink::rtsp::gst::factory] Constructing Factor Impl
[DEBUG neolink::rtsp::gst::factory] Adding anonymous as permitted user
[INFO  neolink::rtsp::stream] argus: Available at /argus/main, /argus/Main, /argus/mainStream, /argus/MainStream, /argus/Mainstream, /argus/mainstream, /argus
[INFO  neolink::common::neocam] argus: Model Argus 4 Pro
[INFO  neolink::common::neocam] argus: Firmware Version v3.0.0.4978_25060601
=== complete silence after this line — no further events, including when DESCRIBE arrives ===

The camera reports the streaming subModule as preview_rw, compress_rw, snap_rw, rtsp_rw, streamTable_ro in its abilities (full XML available on request).

Versions

• NVR software: N/A (direct camera connection)
• Neolink software: neolink 0.6.3-rc.3 (dm82m/hassio-addons neolink-latest v0.1.1, commit 6e05e784)
• Reolink camera model and firmware: Argus 4 Pro, v3.0.0.4978_25060601
• Host: Home Assistant OS 17.2, Raspberry Pi 4 (aarch64), neolink running with host_network: true

Happy to provide additional logs, packet captures, or test patches against this firmware revision.