On Mar 22, 2011, at 4:19 PM, email@hidden wrote:
> Can someone out there who is running QTSS give me some idea of the kind of resource load caused by QTSS, per live stream?
We've always found it to be pretty low. A decent Quad Xserve can easily serve out a hundred streams...it will saturate your network connections to clients long before it runs out of CPU.
Remember...the hard work of crunching down the video isn't done by QTSS...but rather by your encoder (QTB or some other one). QTSS is just throwing the encoded bits down the wire...a simple task given that it's RTSP and UDP.
If you are using QTB, I *highly* recommend you look at getting an ElGato Turbo.264 to use with it. It's cheap, reduces CPU load considerable, and makes for a gorgeous, perfect 30 fps stream.
<rant>
I'm actually glad to see a question about QTSS...we've used it for years and really like it. Apple has never seemed really enthused about it, though.
Now they have the "new" http video transmission protocol that works with iOS devices (as RTSP in QTSS doesn't work in iOS. Why not? How hard could it be?).
But a year and half later...Apple still hasn't provided decent tools...or a version of QTB...that lets us work with the new "video over http" protocol.
Frustrating.
</rant>
-Matt
____________________________________
Matt Federoff
Chief Information Officer
Vail School District
Vail, Arizona USA
520.879.2007
"Technician by trade, Educator at heart"
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