Mataki na 1: Loda naka MP4 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 WebM fayiloli
MP4 zuwa WebM Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan canza MP4 zuwa WebM ba tare da sake-saukar da saukar bidiyo ba?
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Idan MP4 da WebM 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 WebM kuma kawai mai riƙe da shi ya canja. Wani remux na 1 GB MP4 zuwa WebM na iya ƙarewa cikin sakan 5-15 da asarar inganci. A kusa da kowace MP4 a cikin daji ne H.264 bidiyo da AAC sauti; da kwandon kuma doka da aka riƙe HEVC, AV1 da VP9. 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.
MP4 da WebM duka suna da kwalban zamani - wane ne zan riƙe?
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@ action MP4 shi ne mafi aminci da yiwuwar isar da manufa - duk wayar hannu, mai bincike, console, mai shiryawa da Smart TV gina a cikin ƙarni na ƙarshe yana wasa da shi ba tare da kayan aikin ƙari ba. 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.
Shin waƙoƙin sauti masu yawa za su iya tsira daga canji daga MP4 zuwa WebM?
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Na'am — duk waƙoƙin sauti a cikin MP4 (waƙoƙin mai shiryawa, yarukan dabam, waƙoƙin bayani) ana kiyaye su a cikin WebM 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. WebM ne mai tsanani subset na Matroska da Google ya buga a cikin 2010 musamman don ba HTML5 bidiyo a royalty-free jakar.
An riƙe waƙoƙin sunaye-na-ƙasa idan an canja MP4 zuwa WebM?
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Subtitles soft (tracks da ake iya zãɓewa) suna tsira idan WebM 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 MP4 zuwa WebM na dauke da alamomin babi / DVD-style nasarar?
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Metadata na babi na canja tsakanin MP4 da WebM 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 WebM zai samar da fayil da ba a raba shi ba sai idan ka ƙara alamun shafi da hannu.
Me ya faru da canzawa daga MP4 zuwa WebM?
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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 MP4 zuwa WebM yana daure waɗannan maɓallan idan WebM bai zama MKV ba — maɓallan elemental na canjawa, amma nauyin da aka haɗa yana zaune a cikin tushen. Ka riƙe MP4 a matsayin madadin idan kana dogara da maɓallan da aka haɗa.
Mene ne kodeki na fitarwa WebM ke amfani da shi bisa diff?
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An zaɓi codec ɗin diff don ya haɗu da mai riƙe WebM 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. WebM ne wani mummunan fit duk inda a waje na wani mai bincike - video edita, na'urorin' na asali gallery da Smart TVs sosai la'akari da shi.
Ta yaya HDR (HDR10, Dolby Vision) zai iya tsira daga MP4 zuwa WebM?
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Metadata na HDR na canzawa (HDR10 masu nuna kimar, matsakaicin matsakaicin matsakaici) yana tafiyar da WebM 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 MP4 tana da ƙarfi kawai a cikin MKV tare da HEVC; canjawa zuwa ƙuƙumma WebM da ba ta da ɗakin DV yana daidaita zuwa HDR10.
Shin mai canza MP4 zuwa WebM zai riƙe saurin firam mai canzawa (VFR)?
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MKV da WebM suna rikodin lokaci-da-firam na gaskiya kuma suna kula da VFR na asali, don haka MP4 VFR yana tsira cikin WebM 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 MP4 zuwa 24 / 30 / 60 fps WebM ga burin da ke da matsala.
Me yasa fayil ɗin WebM na ƙarami ne / ya fi girma fiye da MP4 bayan canjawa?
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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 MP4 (Blu-ray rip) zuwa low-bitrate WebM (web upload) shi ne dalilin da ya fi yawa na daina aiki.
Shin mai canza MP4 zuwa WebM yana kula da abun ciki na 4K / 8K / 60fps?
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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 MP4 mai girma zuwa WebM ana iyaka da shi ta hanyar I/O na diski, ba CPU ba — MP4 mai 30 GB na iyakance zuwa WebM 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 MP4 na sirri ne yayin canja wurin WebM?
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Na'am — an yi aiki da fayilolin MP4 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.
