I've just setup an EC2 instance with a Wowza AMI v4.0.1 (as suggested on the guides) and am sending a 5mbps stream from Wirecast to transrate with the Transcoder AddOn to 4 different bitrates.
When I first streamed, I noticed in the logs it had defaulted to to weird frame rate so used the sourceStreamFrameRate property to set this at 25 and all seemed ok after a restart.
However, after maybe 5-10 mins the transcoded video looks jerky like it's around half the frame rate. I've check this on iOS devices, my own JW Player and the built in Wowza test players and they all confirm my Wirecast encoded incoming stream looks clean, just the Transcoder output does not.
CPU usage on the c1.xlarge doesn't get much past 20%.
Could anyone take a look at this in the support department at Wowza?