Yintoni kanye kanye i-SRT

Ukuba ukhe wenza naluphi na usasazo lwabukhoma, kuya kufuneka uqhelane neeprothokholi zostrimisho, ngakumbi i-RTMP, eyona protocol ixhaphakileyo yokusasaza bukhoma.Nangona kunjalo, kukho iprotocol entsha yokusasaza eyenza i-buzz kwihlabathi lokusasaza.Ibizwa ngokuba, SRT.Ke, yintoni kanye kanye i-SRT?

I-SRT imele i-Secure Reliable Transport, eyiprotocol yokusasaza ephuhliswe yi-Haivision.Makhe ndibonise ukubaluleka kweprotocol yostrimisho ngomzekelo.Xa umntu evula iYouTube Live ukuze abukele iividiyo, iPC yakho ithumela "isicelo sokuqhagamshela" kwiseva.Esakuvuma isicelo, iseva emva koko ibuyisela idatha yevidiyo ecandiweyo kwiPC apho ividiyo ihlaziywa kwaye idlalwe kwangaxeshanye.I-SRT ngokwesiseko yiprotocol yokusasaza ekufuneka izixhobo ezibini ziqonde ukusasaza ividiyo engenamthungo.Iprothokholi nganye ineenzuzo kunye neengxaki zayo kwaye i-RTMP, i-RTSP, i-HLS kunye ne-SRT zezinye zeendlela eziphambili ezisetyenziselwa ukusasazwa kwevidiyo.

Kutheni i-SRT nangona i-RTMP iyiprothokholi ezinzileyo kwaye esetyenziswa ngokuqhelekileyo?

Ukufunda okuhle nokubi kwe-SRT kunye neempawu zayo, kufuneka siqale siyithelekise ne-RTMP.I-RTMP, ekwabizwa ngokuba yiProtokholi yoThunyelo lweXesha lokwenyani, yiprotocol evuthiweyo, esekwe kakuhle yokusasaza enegama lokuthembeka ngenxa yepakethi esekwe kwi-TCP ekwaziyo ukuhambisa kwakhona kunye nezithinteli ezilungelelanisiweyo.I-RTMP yeyona ndlela ixhaphakileyo yokusasaza iprotocol kodwa ayizange ihlaziywe ukusukela ngo-2012, ngoko ke kunokwenzeka ukuba ithathelwe indawo yi-SRT.

Okona kubaluleke kakhulu, i-SRT iphatha ividiyo eyingxaki ngcono kune-RTMP.Ukusasaza i-RTMP ngaphaya kokungathembekiyo, uthungelwano lwe-bandwidth esezantsi kunokubangela imiba enje ngokuphazamiseka kunye nokuxinana komjelo wakho ophilayo.I-SRT ifuna i-bandwidth encinci kwaye isombulula iimpazamo zedatha ngokukhawuleza.Ngenxa yoko, ababukeli bakho baya kufumana umjelo ongcono, kunye ne-buffering encinci kunye ne-pixelization.

I-SRT ibonelela nge-ultra-low end-to-end latency kwaye inikezela ngesantya esi-2 - 3 amaxesha ngokukhawuleza kune-RTMP.

Xa kuthelekiswa ne-RTMP, ukusasazwa kwe-SRT kubonelela nge-latency ephantsi.Njengoko kuchaziwe kwiphepha elimhlophe (https://www.haivision.com/resources/white-paper/srt-versus-rtmp/) epapashwe yi-Haivision, kwindawo yovavanyo olufanayo, i-SRT inokulibaziseka okuyi-2.5 - 3.2 amaxesha angaphantsi kwe-RTMP, nto leyo iphucula kakhulu.Njengoko kubonisiwe kulo mzobo ungezantsi, ibha eluhlaza imele ukusebenza kwe-SRT, kwaye ibha ye-orenji ibonisa i-RTMP latency (uvavanyo lwenziwa kwiindawo ezine ezahlukeneyo zejografi, njengokusuka eJamani ukuya e-Australia naseJamani ukuya e-US).

Isabonisa ukusebenza okuphezulu nakwinethiwekhi engathembekanga

Ngaphandle kwe-latency ephantsi, kufanelekile ukukhankanya ukuba i-SRT isenokusasaza kwinethiwekhi engasebenzi kakuhle.Isiseko se-SRT sinemisebenzi eyakhelwe-ngaphakathi enciphisa imiphumo emibi ebangelwa ukuguquguquka kwe-bandwidth, ukulahleka kwepakethi, njl., ngaloo ndlela igcina ingqibelelo kunye nomgangatho wevidiyo yomjelo nakwiinethiwekhi ezingalindelekanga.

Izinto eziluncedo ezinokuziswa yi-SRT?

Ukongeza kwi-latency ephantsi kakhulu kunye nokuqina kutshintsho kwimo yenethiwekhi, zikho nezinye izibonelelo ezinokuziselwa yi-SRT.Ngenxa yokuba unokuthumela iividiyo kwitrafikhi engalindelekanga, uthungelwano lweGPS olubizayo ngoko aluyomfuneko, ngoko ke unokukhuphisana ngokweendleko zenkonzo yakho.Ngamanye amagama, unokufumana unxibelelwano oludibeneyo lwe-duplex kuyo nayiphi na indawo ngokufumaneka kwe-Intanethi.Ukuba yi-protocol yokusasazwa kwevidiyo, i-SRT inokupakisha i-MPEG-2, i-H.264 kunye nedatha yevidiyo ye-HEVC kunye nendlela yayo yokubhala i-encryption iqinisekisa ubumfihlo bedatha.

Ngubani ofanele ukusebenzisa i-SRT?

I-SRT yenzelwe zonke iintlobo ezahlukeneyo zosasazo lwevidiyo.Khawufane ucinge kwiholo yenkomfa exineneyo, wonke umntu usebenzisa inethiwekhi efanayo ukulwela uqhagamshelo lwe-Intanethi.Ukuthumela iividiyo kwisitudiyo sokuvelisa ngaphezulu kwenethiwekhi exakekileyo, umgangatho wokuhanjiswa ngokuqinisekileyo uya kuthotywa.Kunokwenzeka ukuba ilahleko yepakethe yenzeke xa kuthunyelwa ividiyo ngenethiwekhi exakekileyo.I-SRT, kule meko, iyasebenza kakhulu ekuthinteleni le miba kwaye inikezela ngeevidiyo ezikumgangatho ophezulu kwiikhowudi ezimiselweyo.

Kukho izikolo ezininzi kunye neecawe kwiindawo ezahlukeneyo.Ukusasaza iividiyo phakathi kwezikolo ezahlukeneyo okanye iicawe, amava okubukela ngokuqinisekileyo aya kuba mnandi ukuba kukho nayiphi na i-latency ngexesha lokusasaza.Ukubambezeleka kunokubangela ilahleko ngexesha nangemali.Nge-SRT, uya kuba nakho ukwenza ividiyo esemgangathweni kunye nevidiyo ethembekileyo phakathi kweendawo ezahlukeneyo.

Yintoni eyenza i-SRT ibe yiprothokholi yostrimisho elungileyo?

Ukuba ulambele ulwazi kwaye ungathanda ukwazi ngakumbi malunga nezi ngongoma zilungileyo malunga ne-SRT, imihlathi embalwa elandelayo iya kunika iinkcazo ezineenkcukacha.Ukuba sele uzazi ezi nkcukacha okanye awunamdla nje, ungatsiba le mihlathi.

Umahluko omkhulu phakathi kwe-RTMP kunye ne-SRT kukungabikho kwezitampu zexesha kwi-RTMP yentloko yepakethe yomsinga.I-RTMP iqulathe kuphela izitampu zexesha zokoqobo lomsinga ngokomlinganiselo wesakhelo sayo.Iipakethi zomntu ngamnye azinalo olu lwazi, ngoko ke umamkeli we-RTMP kufuneka athumele ipakethi nganye efunyenweyo ngaphakathi kwexesha elimiselweyo kwinkqubo ye-decoding.Ukuphelisa iiyantlukwano kwixesha elithathwayo ukuze iipakethi zihambe, ii-buffers ezinkulu ziyafuneka.

I-SRT, kwelinye icala, ibandakanya isitampu sexesha kwipakethi nganye.Oku kuvumela ukuphindaphindwa kweempawu zomqondiso kwicala lomamkeli kwaye kunciphisa ngokumangalisayo imfuno ye-buffering.Ngamanye amagama, umlambo oshiya umamkeli ujongeka kanye njengomlambo oza kumthumeli we-SRT.Omnye umahluko obalulekileyo phakathi kwe-RTMP kunye ne-SRT kukuphunyezwa kokuhanjiswa kwakhona kwepakethi.I-SRT inokuchonga ipakethi yomntu elahlekileyo ngenombolo yayo yolandelelwano.Ukuba i-delta yenombolo yolandelelwano ingaphezulu kwepakethi enye, ukuhanjiswa kwakhona kwaloo pakethi kuyaqaliswa.Kuphela yiloo pakethi ethile ethunyelwa kwakhona ukugcina i-latency kunye ne-overhead ephantsi.

Ngolwazi oluthe kratya malunga neenkcukacha zobugcisa, tyelela iwebhusayithi ye-Haivision esemthethweni kwaye ukhuphele umboniso wabo wobugcisa (https://www.haivision.com/blog/all/excited-srt-video-streaming-protocol-technical-overview/).

Imida ye-SRT

Emva kokubona izibonelelo ezininzi ze-SRT, makhe sijonge imida yayo ngoku.Ngaphandle kwe-Wowza, amaqonga amaninzi okusasaza ixesha lokwenyani awakabinayo i-SRT kwiinkqubo zawo ke ngoko awunakukwazi ukuthatha ithuba leempawu zawo ezintle ukusuka ekugqibeleni komxhasi.Nangona kunjalo, njengoko uninzi lweenkampani kunye nabasebenzisi babucala bethatha i-SRT, kulindeleke ukuba i-SRT ibe ngumgangatho wokusasaza wevidiyo wexesha elizayo.

Isikhumbuzo sokugqibela

Njengoko bekutshiwo ngaphambili, olona phawu lubalaseleyo lwe-SRT yi-latency ephantsi kodwa zikwakho nezinye izinto kuwo wonke umjelo wokuhamba komsebenzi wokusasaza ezinokukhokelela kwi-latency kwaye ekugqibeleni amava amabi okujonga njenge-bandwidth yenethiwekhi, ikhowudi yesixhobo kunye nabahloli.I-SRT ayiqinisekisi ukubambezeleka okuphantsi kunye nezinye izinto ezifana nokusingqongileyo kwenethiwekhi kunye nezixhobo zokusasaza kufuneka zithathelwe ingqalelo.