【正文】
se,redirect等等 ps: sdp的格式 v=version o=username session id version work type address type address s=session name i=session description u=URI e= address p=phone number c=work type address type connection address b=modifier:bandwidthvalue t=start time stop time r=repeat interval active duration list of offsets from starttime z=adjustment time offset adjustment time offset .... k=method k=method:encryption key a=attribute a=attribute:value m=media port transport fmt list v = (協(xié)議版本) o = (所有者 /創(chuàng)建者和會(huì)話標(biāo)識(shí)符) s = (會(huì)話名稱) i = * (會(huì)話信息) u = * ( URI 描述) e = * ( Email 地址) p = * (電話號(hào)碼) c = * (連接信息) b = * (帶寬信息) z = * (時(shí)間區(qū)域調(diào)整) k = * (加密密鑰) a = * ( 0 個(gè)或多個(gè)會(huì)話屬性行) 時(shí)間描述: t = (會(huì)話活動(dòng)時(shí)間) r = * ( 0或多次重復(fù)次數(shù)) 媒體描述: m = (媒體名稱和傳輸?shù)刂罚? i = * (媒體標(biāo)題) c = * (連接信息 — 如果包含在會(huì)話層則該字段可選) b = * (帶寬信息) k = * (加密密鑰) a = * ( 0 個(gè)或多個(gè)媒體屬性行) 參考文章: rfc2326( rtsp); rfc2327( sdp)