Ngati munayamba mwasewerapo, muyenera kuzolowera ma protocol, makamaka RTMP, yomwe ndi njira yodziwika bwino yotsatsira pompopompo.Komabe, pali pulogalamu yatsopano yotsatsira yomwe ikupanga phokoso mudziko lokhamukira.Amatchedwa, SRT.Ndiye, SRT ndi chiyani kwenikweni?
SRT imayimira Secure Reliable Transport, yomwe ndi njira yotsatsira yomwe idapangidwa ndi Haivision.Ndiroleni ndifotokozere kufunikira kwa kukhamukira kwa protocol ndi chitsanzo.Wina akatsegula YouTube Live kuti awone makanema, PC yanu imatumiza "pempho lolumikizana" ku seva.Pambuyo povomereza pempholi, sevayo imabwezeretsanso deta yavidiyo yomwe ili ndi magawo ku PC yomwe kanemayo amasinthidwa ndikusewera nthawi imodzi.SRT kwenikweni ndi njira yotsatsira yomwe zida ziwiri ziyenera kumvetsetsa pakutsitsa makanema mosasamala.Protocol iliyonse ili ndi zabwino ndi zoyipa zake ndipo RTMP, RTSP, HLS ndi SRT ndi ena mwazinthu zodziwika bwino zomwe zimagwiritsidwa ntchito potsatsa makanema.
Chifukwa chiyani SRT ngakhale RTMP ndi njira yokhazikika komanso yogwiritsidwa ntchito kwambiri?
Kuti tiphunzire zabwino ndi zoyipa za SRT komanso mawonekedwe ake, choyamba tiyenera kufananiza ndi RTMP.RTMP, yomwe imadziwikanso kuti Real-Time Messaging Protocol, ndi njira yotsatsira yokhwima, yokhazikitsidwa bwino yomwe imadziwika kuti ndi yodalirika chifukwa cha kuthekera kwake kotumizanso paketi yochokera ku TCP ndi ma buffer osinthika.RTMP ndiyo njira yomwe imagwiritsidwa ntchito kwambiri pakukhamukira koma sinasinthidwepo kuyambira 2012, kotero ndizotheka kuti idzasinthidwa ndi SRT.
Chofunika kwambiri, SRT imasamalira mavidiyo ovuta kuposa RTMP.Kukhamukira kwa RTMP pamanetiweki osadalirika, otsika pang'ono kumatha kuyambitsa zovuta monga kusungitsa ndi kusokoneza mayendedwe anu.SRT imafuna bandwidth yocheperako ndipo imathetsa zolakwika za data mwachangu.Zotsatira zake, owonera anu azikhala ndi mtsinje wabwinoko, wokhala ndi buffering komanso pixelization.
SRT imapereka latency yotsika mpaka kumapeto ndipo imapereka liwiro lomwe ndi 2 - 3 nthawi mwachangu kuposa RTMP.
Poyerekeza ndi RTMP, kukhamukira kwa SRT kumapereka latency yotsika.Monga momwe zalembedwera papepala loyera (https://www.haivision.com/resources/white-paper/srt-versus-rtmp/) lofalitsidwa ndi Haivision, m'malo oyesera omwewo, SRT ili ndi kuchedwa komwe ndi 2.5 - 3.2 nthawi zochepa kuposa RTMP, zomwe ziri bwino kwambiri.Monga momwe tawonetsera m'chithunzi chomwe chili pansipa, kapamwamba ka buluu kakuyimira kachitidwe ka SRT, ndipo bala lalalanje likuwonetsa RTMP latency (mayeso adachitika m'malo anayi osiyanasiyana, monga kuchokera ku Germany kupita ku Australia ndi Germany kupita ku US).
Ikuwonetsabe magwiridwe antchito apamwamba ngakhale pamaneti osadalirika
Kupatula kutsika kwake kocheperako, ndikofunikira kunena kuti SRT imatha kutumizabe maukonde osachita bwino.Zomangamanga za SRT zili ndi ntchito zopangira zomwe zimachepetsa zotsatira zoyipa zomwe zimayambitsidwa ndi kusinthasintha kwa bandwidth, kutayika kwa paketi, ndi zina zambiri, potero kusunga kukhulupirika ndi mtundu wamavidiyo amakanema ngakhale mumanetiweki osayembekezereka.
Ubwino womwe SRT ingabweretse?
Kuphatikiza pa ultra-low latency ndi kulimba mtima pakusintha kwamanetiweki, palinso zabwino zina zomwe SRT ingakubweretsereni.Chifukwa mutha kutumiza makanema pamagalimoto osadziwika bwino, ma netiweki a GPS okwera mtengo safunikira, kotero mutha kukhala opikisana potengera mtengo wantchito yanu.Mwanjira ina, mutha kulumikizana ndi kulumikizana kwapawiri kulikonse komwe kuli ndi intaneti.Pokhala pulogalamu yotsatsira mavidiyo, SRT ikhoza kuyika MPEG-2, H.264 ndi HEVC deta ya kanema ndi njira yake yosungiramo chinsinsi imatsimikizira chinsinsi cha deta.
Ndani ayenera kugwiritsa ntchito SRT?
SRT idapangidwira mitundu yonse yosiyanasiyana yamakanema.Tangoganizani muholo yodzaza ndi misonkhano, aliyense amagwiritsa ntchito netiweki yomweyo kuti apikisane ndi intaneti.Kutumiza makanema ku situdiyo yopanga pamaneti otanganidwa chotere, kufalitsa kwabwino kudzakhala konyozeka.Ndizotheka kwambiri kuti kutayika kwa paketi kuchitike potumiza kanema pamaneti otanganidwa.SRT, pakadali pano, ndiyothandiza kwambiri popewa zovutazi ndipo imapereka makanema apamwamba kwambiri kwa ma encoder omwe akuyembekezeredwa.
Palinso masukulu ndi matchalitchi angapo m'malo osiyanasiyana.Kukhamukira makanema pakati pa masukulu osiyanasiyana kapena mipingo, zowonera sizingakhale zosasangalatsa ngati pali latency pakukhamukira.Kuchedwa kungayambitsenso kutaya nthawi ndi ndalama.Ndi SRT, mutha kupanga makanema abwino komanso odalirika pakati pa malo osiyanasiyana.
Kodi chimapangitsa SRT kukhala protocol yabwino yotsatsira?
Ngati muli ndi njala yodziwa zambiri ndipo mukufuna kudziwa zambiri za mfundo zabwino zomwe zili pamwambazi za SRT, ndime zingapo zotsatirazi zikufotokozerani mwatsatanetsatane.Ngati mukudziwa kale izi kapena simukufuna, mutha kulumpha ndime izi.
Kusiyana kwakukulu pakati pa RTMP ndi SRT ndikuti palibe masitampu anthawi pamitu ya paketi ya RTMP.RTMP imangokhala ndi ma timestamp amtsinje weniweni malinga ndi mtengo wake.Mapaketi apawokhawo alibe chidziwitsochi, chifukwa chake wolandila RTMP ayenera kutumiza paketi iliyonse yomwe yalandilidwa mkati mwanthawi yoikika pakupanga ma decoding.Kuti muthetse kusiyana kwa nthawi yomwe pamafunika kuti mapaketi aziyenda, mabafa akulu amafunikira.
SRT, kumbali ina, imaphatikizapo sitampu yanthawi ya paketi iliyonse.Izi zimathandizira kusangalatsa kwa mawonekedwe azizindikiro kumbali yolandila ndikuchepetsa kwambiri kufunikira kwa buffering.Mwanjira ina, mtsinje wocheperako womwe umasiya wolandila umawoneka chimodzimodzi ngati mtsinje ukubwera mwa wotumiza wa SRT.Kusiyana kwina kwakukulu pakati pa RTMP ndi SRT ndikukhazikitsanso kutumizanso paketi.SRT imatha kuzindikira paketi yomwe yatayika ndi nambala yake yotsatizana.Ngati delta yotsatizana ndi paketi imodzi, kutumizidwanso kwa paketiyo kumayambika.Ndi paketi yokhayo yomwe imatumizidwanso kuti isunge latency ndi kutsika kwapamwamba.
Kuti mumve zambiri zaukadaulo, pitani patsamba lovomerezeka la Haivision ndikutsitsa mawonekedwe awo aukadaulo (https://www.haivision.com/blog/all/excited-srt-video-streaming-protocol-technical-overview/).
Zochepa za SRT
Titawona zabwino zambiri za SRT, tiyeni tiwone zofooka zake tsopano.Kupatula Wowza, mapulatifomu ambiri oyambira nthawi yeniyeni alibe SRT pamakina awo kotero mwina simungatengerepo mwayi pazinthu zake zabwino kuchokera kumapeto kwa kasitomala.Komabe, pamene makampani ochulukirachulukira komanso ogwiritsa ntchito wamba atengera SRT, zikuyembekezeka kuti SRT ikhala mulingo wamtsogolo wotsatsira makanema.
Chikumbutso chomaliza
Monga tanenera kale, mbali yaikulu ya SRT ndi kuchedwa kwake kochepa koma palinso zinthu zina mumayendedwe onse oyendayenda omwe angayambitse kuchedwa ndipo pamapeto pake kuwonera koyipa monga bandwidth ya netiweki, codec ya chipangizo ndi oyang'anira.SRT sikutanthauza kuchedwa kwapang'onopang'ono komanso zinthu zina monga malo ochezera a pa intaneti ndi zida zosinthira ziyenera kuganiziridwanso.
Nthawi yotumiza: Apr-13-2022