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 MPEG fayiloli
MP4 zuwa MPEG Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan canza MP4 zuwa MPEG ba tare da sake-saukar da saukar bidiyo ba?
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Idan MP4 da MPEG 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 MPEG kuma kawai mai riƙe da shi ya canja. Wani remux na 1 GB MP4 zuwa MPEG na iya ƙarewa cikin sakan 5-15 da asarar inganci.
Shin waƙoƙin sauti masu yawa za su iya tsira daga canji daga MP4 zuwa MPEG?
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Na'am — duk waƙoƙin sauti a cikin MP4 (waƙoƙin mai shiryawa, yarukan dabam, waƙoƙin bayani) ana kiyaye su a cikin MPEG 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.
An riƙe waƙoƙin sunaye-na-ƙasa idan an canja MP4 zuwa MPEG?
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Subtitles soft (tracks da ake iya zãɓewa) suna tsira idan MPEG 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 MPEG na dauke da alamomin babi / DVD-style nasarar?
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Metadata na babi na canja tsakanin MP4 da MPEG 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 MPEG 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 MPEG?
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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 MPEG yana daure waɗannan maɓallan idan MPEG 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 MPEG ke amfani da shi bisa diff?
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An zaɓi codec ɗin diff don ya haɗu da mai riƙe MPEG 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.
Ta yaya HDR (HDR10, Dolby Vision) zai iya tsira daga MP4 zuwa MPEG?
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Metadata na HDR na canzawa (HDR10 masu nuna kimar, matsakaicin matsakaicin matsakaici) yana tafiyar da MPEG 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 MPEG da ba ta da ɗakin DV yana daidaita zuwa HDR10.
Shin mai canza MP4 zuwa MPEG 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 MPEG 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 MPEG ga burin da ke da matsala.
Me yasa fayil ɗin MPEG 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 MPEG (web upload) shi ne dalilin da ya fi yawa na daina aiki.
Shin mai canza MP4 zuwa MPEG 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 MPEG ana iyaka da shi ta hanyar I/O na diski, ba CPU ba — MP4 mai 30 GB na iyakance zuwa MPEG 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 MPEG?
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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.
Ba a cikin aikin guda ba - ka riƙe canji mai maida hankali kan kwandon / codec. Yi amfani da /trim/ don kakkabe MP4 farko, sa'an nan ka sanya mataki na MP4 -> MPEG cikin jerin. Don haɗuwa da wasu kakkaben zuwa cikin MPEG guda, kayan aikin /merge/ na haɗa su a kan tsarin kodeki-da-kodeki (ya sake haɗawa idan shigarwa suna raba kodeki, sake haɗawa idan ba haka ba) kuma ya fitar da fayil ɗaya MPEG a ƙarshe.