Video conference/web chat using red5+flex4, performance issues on higher res. - how to pinpoint?

Question

Hello.

I have performance issues with my test web chat app - video playback is very slow on, around 1 frame per few seconds at 640x480, 15fps, quality: 90. Network usage is low (gigabit LAN), cpu's still have some headroom so it should be the software.

Quick description of my setup: red5 0.9.1; simple flash broadcast and subscribe derived from here http://lkcl.net/videoconf/ and mr. accattato's videos; using oflaDemo on serverside.

Local image on the broadcaster is good.

So far I guess flash broadcaster would be the most likely culprit, but here is my worst since I am new to flex. Red5 should not modify the stream I guess, and it doesn't make much sense for the subscriber to play only 1 frame per second.

Any help most appreciated.

Answer 1

I must say I feel a bit dumb. After a few days spent on this I found out the BANDWIDTH parameter was set very very low. I somehow managed to show camera data on screen and noticed that quite soon.

Though still, the performance aint what I want it to be. At 640x480 and normal quality I get a few frames per second only, thats very jerky motion. Tried setting keyframes to 1, but I don't think it is working. Still, network is mostly idle and cpu has some headroom.

The question remains, how to find the bottleneck?