基于libopenh264 codec的svc分层流实现方案OpenH264 http://www.openh264.org/ 是标准的H.264 encoder/decoder. ffmpeg已经集成libopenh264,但不支持svc特性。 openh264 encoder支持svc特性: 1. 时域4层:Temporal scalability up to 4 layers in a dyadic hierarchy 2. 空域4层:Spatial simulcast up to 4 resolutions from a single input Temp