thanks for starting this thread! I have the amcrest IP5M-T1179EW, flashed to Dahua firmware
(per this forum thread).
Speculation-- The "switching to sub-stream" message may have something to do with resolutions of source video versus computer screen-- why send a 5mp feed when the destination can only display 1080p? Just a thought. Other newer Dahua cams behave the same way (all Amcrest IP Cams are Dahua re-branded) .
Last night-- there was some "weirdness" with that cam, and looking at recordings, I may have had this happen before and not known it. At about 12:15 am or so, the camera went offline. I was still up, and messing with the interface on my managed switch. The Switch reported no network connection there. Hmmmm... I was able to turn OFF the POE power feed to that port and then turn it on again-- effectively a reboot of the camera. Camera never came back. Switch reported no network connection there. What was interesting was the POE data from the switch...
Between 3:00am and 3:10am, the camera popped up on the network again. The switch interface showed it pulling 2.9 watts of power-- a nice normal amount.
Last night when the cam was down-- that port was reporting 9 ~ 10 watts of power being delivered to that port.
You mentioned the cam was "warm to the touch" --- I wonder if mine was also "warm" with 3 times the normal POE wattage going to it for some reason....
So.... I am wondering if this is a Cam issue, or if I managed to pull cable across something sharp in my attic and create a partial short due to damaging the twisted pair that feeds power.
@fenderman --- Any thought on this? Intermittent issues suck!