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 librariesSomeone 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 allEmiliano Olivier