hi guys,

I was wondering if someone could tell me how rtmp behaves with regards to delay..

is it ever changing
does it always get slowly worse and worse then for me at least, stay at around 10secs until restarted
is there a way of making it behave like UDP - so dropping every bad packet straight away to stay in sync

as it is, it seems if I had two camera pulled in remotely they wouldnt be in sync or stay in sync, so I want to know how to plan to use it

with how it is I would only use it to record interviews and play them out moment after once they're safely in

I generally agree with DWAM, RTMP is for distribution, not contribution.

That said, I have used IP cameras that include both RTMP and SIP as means of connection. SIP is more typically found in IP phones and video conferencing. SIP defaults to passing the media via RTP over UDP. It's nearly always point-to-point, which helps with latency.

Most IP cameras deliver H264 which implies some encoding delay, usually 1-2 seconds. Some are capable of MJPEG, which requires more bandwidth but does not add that latency.

So, if your camera has SIP connectivity and supports MJPEG encoding, you can reduce the latency on the feed. Grandstream cameras did this. But have exited the IP camera business over the past year.