It seems that the challenge must be sent every 30 seconds now or else it stops sending the stream after a minute.
I've said this many times before, but the admins of all those webcam sites are well aware that these stream-recorder.com forums exist. As soon as you publicly post a tool to download the webcam streams, they'll change it again... and again... and again, so there's no real point in posting updates.
This is exactly what "itsme" meant with
do it on your own and keep it to yourself.
Personally I don't care about cam4 at all, cam4 is a mess. This is one big turd of a webcam site with all the low quality, stuttering webcam streams. I posted an updated version of cam4cmdline again, because many people asked me to fix it, but I'm not going to post updates week after week after week.