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