[Bug] CW500 dual-lens camera channel=2 not working with cs2 protocol

[iamyaofeng]

Device

• Model: Xiaomi CW500 (isa.camera.hlmax / c500ch)
• Firmware: latest (via Mi Home)

Configuration

go2rtc version: 1.9.14+dev.dc1685e

streams:
micam5: CW500 ball lens (channel=2)
- xiaomi://***@192.168.1.61?did=1068313182&model=isa.camera.hlmax&channel=2

Expected behavior

Channel=2 ball lens stream works like channel=1 (main lens)

Actual behavior

• error: streams: cs2: can't send command 4097 stream=micam5
• error: read tcp ... connection reset by peer
• Connection reset by peer when trying to access channel=2
• Channel=1 works fine
• Mi Home App shows both channel=1 and channel=2 correctly

Additional info

• Channel=1 (main lens) works perfectly with cs2 protocol
• Channel=2 works in Mi Home App
• Other single-lens cameras work fine

[AlexxIT]

It's a mistake to think that channel=1 is the main channel. The main channel is channel=0 or no channel specified. Any other values are the secondary channel.
https://github.com/AlexxIT/go2rtc/tree/master/internal/xiaomi#configuration

[iamyaofeng]

Thank you for the explanation! So channel=0 or no channel is the main channel, and channel=1 or channel=2 are secondary channels.
But I have another question: can CW500 dual-lens camera get both channels at the same time? Or does it require two separate connections?
My config:
Copy
micam5: #CW500-PTZ View

• xiaomi://******&model=isa.camera.hlmax&subtype=3

micam1: #CW500-Fixed View
-xiaomi://******isa.camera.hlmax&subtype=3&channel=1

micam1_sd：#CW500-Fixed View sd
-xiaomi://*******isa.camera.hlmax&subtype=1&channel=1

micam1_h264: #CW500-Fixed View-h264
-ffmpeg:micam1#video=h264#hardware#audio=copy

channel=1 works fine, but PTZ view errors: streams: cs2: can't send command 4097
Any suggestions?