Mataki na 1: Loda naka WebM fayiloli ta amfani da maɓallin da ke sama ko ta hanyar ja da sauke su.
Mataki na 2: Danna maɓallin 'Maida' don fara hira.
Mataki na 3: Sauke fayil ɗin da aka canza HLS fayiloli
WebM zuwa HLS Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan canza WebM zuwa HLS ba tare da sake-saukar da saukar bidiyo ba?
+
Idan WebM da HLS na iya ɗaukar codec guda (H.264, H.265, VP9, AV1), mai maida zai koma zuwa wani remux: ana kwafe maganganun farko bayt-by-bayt cikin HLS kuma kawai mai riƙe da shi ya canja. Wani remux na 1 GB WebM zuwa HLS na iya ƙarewa cikin sakan 5-15 da asarar inganci. WebM an yi shi da nufin ya zama mai ƙunci: VP8 ko VP9 bidiyo (AV1 da aka fi amfani da shi a baya) tare da Vorbis ko Opus sauti, da kuma komai na daban. A HLS stream is a.m3u8 manifest pointing at a staircase of H.264 or HEVC segments at several bitrates, so the player can switch quality mid-playback.
Shin HLS wani mai riƙewa ne ko kuma codec, kuma shin wannan zai canza abin da zan samu?
+
@ action
Shin waƙoƙin sauti masu yawa za su iya tsira daga canji daga WebM zuwa HLS?
+
Na'am — duk waƙoƙin sauti a cikin WebM (waƙoƙin mai shiryawa, yarukan dabam, waƙoƙin bayani) ana kiyaye su a cikin HLS idan mai nema na goyon bayan waƙoƙin sauti masu yawa. MKV da MOV suna kula da waƙoƙin sauti ba tare da iyaka ba; MP4 yana goyon bayan da yawa amma wasu masu wasa da na'urorin haɗi suna ganin waƙoƙin 1 kawai; WebM ana hana shi a waƙoƙin Opus / Vorbis guda. HLS shine Apple's HTTP Live Streaming - ba fayil ba amma playlist tare da fayil na ɓangarorin kafofin watsa labarun.
An riƙe waƙoƙin sunaye-na-ƙasa idan an canja WebM zuwa HLS?
+
Subtitles soft (tracks da ake iya zãɓewa) suna tsira idan HLS zai iya ɗaukar su: MKV yana da SRT, ASS, SSA, PGS, VobSub a matsayin native; MP4 yana da mov_text kawai (farashin da aka rufe). Canja MKV tare da ASS styled subs zuwa MP4 zai iya sa su kasa zuwa mov_text ko kuma a toshe su. Hardsubs (an toshe su cikin bidiyo) suna tsira duk da haka.
Shin WebM zuwa HLS na dauke da alamomin babi / DVD-style nasarar?
+
Metadata na babi na canja tsakanin WebM da HLS duk lokacin da bangarorin biyu ke goyon bayan wani atom na babi (MKV, MP4, MOV). WebM na adana babi a cikin wani ɓangaren da ya dace da Matroska, don haka MKV <-> WebM na dauke da babi-zuwa-baya cikin tsabta. AVI ba shi da wani bayani na babi, don haka canja AVI zuwa HLS zai samar da fayil da ba a raba shi ba sai idan ka ƙara alamun shafi da hannu.
Me ya faru da canzawa daga WebM zuwa HLS?
+
MKV shi ne mai sarrafa maɓallin maɓalli kawai wanda ke adana fayilolin da aka haɗa (TTF fonts for ASS subs, JPG cover art, fan-translated PDF inserts). Zuwa daga WebM zuwa HLS yana daure waɗannan maɓallan idan HLS bai zama MKV ba — maɓallan elemental na canjawa, amma nauyin da aka haɗa yana zaune a cikin tushen. Ka riƙe WebM a matsayin madadin idan kana dogara da maɓallan da aka haɗa.
Mene ne kodeki na fitarwa HLS ke amfani da shi bisa diff?
+
An zaɓi codec ɗin diff don ya haɗu da mai riƙe HLS da kyau: MKV diff zuwa H.265 (HEVC) don mafi kyawun ƙuntata; MP4 diff zuwa H.264 don mafi faɗin goyon baya na na'ura; WebM diff zuwa VP9; AVI yana amfani da MPEG-4 ASP (DivX/Xvid lineage). Yaƙin neman zaɓe ta hanyar jerin kayan aikin codec na ci gaba — AV1 yana da samuwa ga MKV / WebM inda kake so mafi girman ƙuntata kuma zaka iya jira ta hanyar ƙuntata. HLS ya dace da bandwidth na mai kallo a cikin lokaci na gaskiya kuma shine kawai format na streaming Safari da iOS goyon baya na asali. HLS ba fayil ne mai saukewa guda ba - don a kiyaye shi ba da sadarwa dole ne a mushe shi zuwa cikin wani kwandon da'ira farko.
Ta yaya HDR (HDR10, Dolby Vision) zai iya tsira daga WebM zuwa HLS?
+
Metadata na HDR na canzawa (HDR10 masu nuna kimar, matsakaicin matsakaicin matsakaici) yana tafiyar da HLS idan kowace ƙuƙumma da codec ɗin da aka zaɓa suna goyon baya (HEVC, AV1 a cikin MKV / MP4). Dolby Vision yana da tsananin rauni — siffar DV 5 / 7 / 8.1 a cikin WebM tana da ƙarfi kawai a cikin MKV tare da HEVC; canjawa zuwa ƙuƙumma HLS da ba ta da ɗakin DV yana daidaita zuwa HDR10.
Shin mai canza WebM zuwa HLS zai riƙe saurin firam mai canzawa (VFR)?
+
MKV da WebM suna rikodin lokaci-da-firam na gaskiya kuma suna kula da VFR na asali, don haka WebM VFR yana tsira cikin HLS daga cikin waɗannan sifofin ba tare da sake-samuwa ba. MP4 na adana lokaci-da-samuwa kuma amma wasu masu wasa suna tsammanin CFR; mai maida yana nuna wani "ciwon CFR" toggle wanda ke sake-samuwa VFR WebM zuwa 24 / 30 / 60 fps HLS ga burin da ke da matsala.
Me yasa fayil ɗin HLS na ƙarami ne / ya fi girma fiye da WebM bayan canjawa?
+
Same-codec remux na samar da girman da ya kusan daidai (cikin kwandon da ke da bambanci na 0.1-2%). Canjin codec na iya juya girman da 50% ko fiye: H.264 zuwa H.265 na iya raba fayil din da rabi da ingancin gani na daidai; H.264 zuwa AV1 na raba shi da rabi a kan wani ƙananan ƙayyadadden. Zuwa daga high-bitrate WebM (Blu-ray rip) zuwa low-bitrate HLS (web upload) shi ne dalilin da ya fi yawa na daina aiki.
Shin mai canza WebM zuwa HLS yana kula da abun ciki na 4K / 8K / 60fps?
+
Na'am har zuwa 8K (7680x4320) akan Premium. Mataki na kyauta yana kula da 4K (3840x2160) har zuwa iyakar fayil na 1 GB. Remuxes na tsarki (dauke da codec guda) na WebM mai girma zuwa HLS ana iyaka da shi ta hanyar I/O na diski, ba CPU ba — WebM mai 30 GB na iyakance zuwa HLS cikin minti daya ko da yake da ma'aunin. Ana sake-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sauya-sa
Shin fayil ɗin WebM na sirri ne yayin canja wurin HLS?
+
Na'am — an yi aiki da fayilolin WebM da aka tura a cikin masu aiki masu tsalle-tsalle kuma an share su cikin mintina na kammalawa. Ba za mu taba ganin, adana, riƙe, ko raba abun cikin ba. Ka duba /privacy/ don taga riƙe bayanan. Tashar canja wurin tana tafiya akan kayan aiki da muke kula da su daga ƙarshe zuwa ƙarshe; babu wani API na ɓangare na uku da zai karɓi fayil ɗinka. WebM yana wasa a cikin kowane mai bincike na zamani ba tare da wata ƙaramar taga ba, ba tare da wata kudin lasisin ba da kuma ba tare da wata bayyanar patent ba, wanda ke sa shi ya zama diff ga bidiyo mai shigar da yanar gizo.
HLS (HTTP Live Streaming) ƙa'idar yawo ce ta Apple don sadar da abun ciki na sauti da bidiyo akan intanet. Yana ba da yawo mai daidaitawa don ingantaccen aikin sake kunnawa.
