Tam sim no, ntau qhov kev tshaj tawm xov xwm thiab TV tseem siv cov koob yees duab ib txwm siv tsis yog lub koob yees duab network, yog li nws tsis tuaj yeem xa ncaj qha rau IP chaw nyob hauv lub network. Piv txwv li, cov yeeb yaj kiab tso tawm los ntawm cov koob yees duab tsoos tsis yog streaming media, yog li cov ntaub ntawv yuav loj heev thiab tsis haum rau kev sib kis ntawm lub network. Yog li ntawd, ib tug video encoder yog xav tau los compress thiab txo cov video tso zis los ntawm lub koob yees duab no kom haum rau network kis tau tus mob. Nyob rau tib lub sijhawm, tus IP chaw nyob tuaj yeem raug teeb tsa thiab nws muaj kev ua haujlwm streaming. Hauv kev xaiv tus encoder, nws yog ib txwm txiav txim siab raws li tus kheej daim ntawv thov scenario, yog li muaj ob peb yam uas yuav tsum tau hais txog thaum xaiv lub network encoder.
Ua ntej, ib qho interface encoder nrog SDI / HDMI cov tswv yim
Vim li cas xaiv SDI / HDMI interface? SDI / HDMI yog ob qho tib si kev txhais lus siab thiab tseem yog ib qho kev sib txuas lus digital siv rau kev sib kis video, raws li Smpte serial txuas tus qauv.
SDI/HDMI siv raw cov ntaub ntawv video rau kev sib kis tsis muaj compression, kom ntseeg tau tias cov duab tsis zoo thiab kev nthuav qhia tseeb ntawm cov ntsiab lus video. Vim tsis compressing cov teeb liab video, lub sijhawm xa mus ntawm lub teeb liab video tuaj yeem ua tiav yam tsis ua rau cov duab qeeb.
Thib ob, txhawm rau nthuav 4G network ua haujlwm, WiFi yog qhov yuav tsum tau ua
WiFi thiab 4G tes hauj lwm yog tsim nyog rau video encoder functionality. Vim tias muaj ntau lub sijhawm, tsis muaj WIFI network, 4G muaj nuj nqi tuaj yeem siv tau, thiab nws lub network ceev tuaj yeem ncav cuag kaum mus rau kaum npaug ntawm 3G network ceev. Nws yog ib qho ntawm cov qauv zoo tshaj plaws tshiab wireless broadband kev sib txuas lus qauv, nrog rau cov yam ntxwv ntawm kev kub ceev, tsis tshua muaj latency, thiab thoob ntiaj teb. Nws yog qhov zoo tshaj plaws los xaiv kom muaj ib tug built-in dual band (2.4G / 5.8G) WiFi module uas txhawb USB txuas ntxiv 4G-LTEdongle, uas tuaj yeem ua tiav ntau hom kev sib txuas lus wireless.
Thib peb, thev naus laus zis nrog H.265 encoding muaj nuj nqi
Tam sim no, feem ntau hauv online nyob streaming platforms siv H.264 encoding technology. H.265 high-efficiency video encoding yog video compression standard, uas yog ib tug tshiab video encoding tsim tom qab H.264. H. 265 (HEVC) thev naus laus zis tau suav tias tsis yog txhim kho video zoo xwb, tab sis kuj ua tiav qhov compression ntawm ob zaug ntawm H.264/MPEG-4 AVC (nrog tus nqi txo qis ntawm 50% rau tib yam. duab zoo). Nws tuaj yeem txhawb nqa 4K daws teeb meem thiab txawm tias ultra siab txhais TV, nrog kev daws teeb meem siab tshaj plaws ntawm 8192 x 4320 (8K daws teeb meem). Yog li ntawd, H.265 thev naus laus zis yog siv los txhim kho kev sib raug zoo ntawm me ntsis kwj, encoding zoo, latency, thiab algorithm complexity, ua kom pom kev zoo.
Plaub, kev txhawb nqa rau ntau txoj kev ua haujlwm (RTMP / RTSP / SRT)
Tam sim no, cov zis ntawm online nyob streaming encoders xav tau los txhawb RTMP / RTSP raws tu qauv, uas yog tus qauv raws tu qauv rau cov zis encoder. Vim yog lub lag luam PC loj, Windows yog lub PC tseem ceeb, thiab Windows browsers yeej txhawb Flash. Flash kuj txhawb RTMP raws tu qauv, yog li txhua tus encoders (xws li lub koob yees duab) txhawb RTMP cov zis. RTMP muaj qis dua latency piv rau HTTP raws tu qauv kwj (feem ntau tshaj 10 vib nas this), yog li nws feem ntau siv nyob rau hauv streaming daim ntawv thov.
Tom ntej no, cia peb tsom mus rau SRT raws tu qauv, uas yog tam sim no nrov heev qhib-qhov chaw qis latency video kis raws tu qauv. Siv SRT txhim khu kev qha kis tau tus mob thev naus laus zis, peb tuaj yeem ua tiav qhov kev nyab xeeb thiab txhim khu kev qha kis tau tus mob thiab faib cov yeeb yaj kiab siab txhais ntawm ntau qhov chaw hauv ib puag ncig hauv Internet. SRT txhawb AES encryption los xyuas kom meej qhov kawg-rau-kawg video kis kev ruaj ntseg.
Nyob rau hauv cov nqe lus ntawm kev ntseeg tau, SRT ua kom muaj kev ruaj ntseg ntawm kev sib txuas lus los ntawm kev kho tshuab rau pem hauv ntej (FEC).
Hais txog qhov tsis tshua muaj latency, SRT tau ua rau sab saum toj ntawm UDT raws tu qauv, daws qhov teeb meem ntawm kev sib kis siab latency hauv UDT raws tu qauv. UDT raws tu qauv yog raws li UDP network kev sib txuas lus raws tu qauv. SRT daws cov teeb meem sib kis tau yooj yim thiab tuaj yeem txhawb nqa kev sib kis ntawm cov ntaub ntawv siab dhau los thiab cov yeeb yaj kiab ultra ntshiab. Yog li tam sim no, ntau qhov kev tshaj tawm xov xwm thiab kev lag luam nyob streaming txaus siab xaiv los txhawb SRT raws tu qauv encoders.