How should video & audio be encoded/compressed for EMS use? Written by on 19 Dec 2012. Posted in Support Forum › Category: Usage and Features › How should video & audio be encoded/compressed for EMS use? 0 Vote Up Vote Down Don asked 13 years ago How should my video and audio be encoded/compressed for use with the EMS? 1 Answers 0 Vote Up Vote Down Don answered 10 years ago The EvoStream Media Server requires that the video be encoded with H.264 and that audio be encoded as AAC. MP3 and G711 are supported for pass-through mode (RTMP->RTMP, etc).