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 12 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 9 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).