Hello, thank you for all the help provided in the past days.

I have finally managed to assembly all togheder very well, i can join a conference with different client and do correct trascoding via libav or other libraries

Someone have experience about HD conference?

With my hardware, the process is very slow, even only with 2 call i can't see other side video correctly (drops in fps, low quality and loss of frames) and the cpu running high.

All is done in a intranet 100M, so there isn't a cap in the bitrate or other similar problem.

I include my machine configuration, i need a more powerful HW only for bridge 2 call in trascoding?

Architecture:          x86_64
CPU op-mode(s):        32-bit, 64-bit
Byte Order:            Little Endian
CPU(s):                8
On-line CPU(s) list:   0-7
Thread(s) per core:    2
Core(s) per socket:    4
Socket(s):             1
NUMA node(s):          1
Vendor ID:             GenuineIntel
CPU family:            6
Model:                 58
Model name:            Intel(R) Xeon(R) CPU E3-1270 V2 @ 3.50GHz
Stepping:              9
CPU MHz:               1600.292
CPU max MHz:           3900.0000
CPU min MHz:           1600.0000
BogoMIPS:              6984.13
Virtualization:        VT-x
L1d cache:             32K
L1i cache:             32K
L2 cache:              256K
L3 cache:              8192K
NUMA node0 CPU(s):     0-7

Thanks for all

Emiliano Olivier