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 M4V fayiloli
MP4 zuwa M4V Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan canza MP4 zuwa M4V ba tare da sake-saukar da saukar bidiyo ba?
+
Idan MP4 da M4V 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 M4V kuma kawai mai riƙe da shi ya canja. Wani remux na 1 GB MP4 zuwa M4V 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. A cikin tsari, M4V shi ne MP4 — H.264 ko HEVC tare da AAC — tare da zaɓaɓɓen Apple FairPlay DRM da iTunes sashe metadata.
An iya canja MP4 zuwa M4V ba tare da sake encoding bidiyo ba?
+
Ya, kuma wannan shi ne hanya mai sauri. MP4 da M4V suna raba irin wannan tsari na akwatin da ke ƙasa, don haka ana kwafe bidiyon da sauti a cikin bayt-by-byte kuma kawai an sake rubuta ƙofar ƙofar. Ba a decode komai ba kuma ba a sake ƙuntata komai ba, don haka fayil mai tsawo na fasali zai ƙare cikin minti daya a maimakon awa daya, tare da ingancin fitarwa na daidai da na asali. MP4 ne ISO/IEC 14496-14, standardized a cikin 2001 da kuma dauke daga irin QuickTime akwatin zane MOV amfani. M4V ne Apple na daban-daban na MP4, da aka yi amfani da iTunes da Apple TV app ga fina-finai da TV shirye-shirye.
Shin M4V na goyon bayan alamun shafi da MP4 ba ta goyon ba?
+
Yana yi. M4V na adana sashe kamar metadata na kwandon, don haka za'a iya tafiyar da wani rikodin mai tsawo ta ɓangaren ba tare da rufe wani barar ci gaba ba. MP4 ba ta da wurin da za'a saka wannan bayanin ba, don haka idan mai samarwa ya aiko da jerin sashe ya kasance cikin fayil na sidedcar — ba da wannan zuwa mai canja wurin kuma zai rubuta cikin M4V. M4V na riƙe da alamun shafi, zane da shirye-shiryen ƙarya a cikin siffar da shirin ayuka na Apple TV ke tsammani, wanda MP4 na ɗabi'a ke rasa da yawa.
Shin, zan iya shigar da fayil a cikin wani shafi na yanar gizo bayan na canja MP4 zuwa M4V?
+
Ba kai tsaye ba. MP4 yana wasa cikin layin cikin duk wani mai bincike; M4V ba haka ba ne, don haka wani shafi mai shigar da shi zai koma zuwa wani alaƙa na saukewa ko wani firam na mai wasa ba. Idan fayil ɗin ya kasance an tsara shi ga wani shafin yanar gizo, ka riƙe MP4 don yanar gizo kuma ka yi amfani da M4V kamar arshiya ko gyara kwafin. DRM-ƙona M4V sayen ba za a iya canjawa da wani abu; kawai unprotected M4V fayiloli ne convertable, da kuma ba Apple 'yan wasan da yawa bukatar da fayil extension rebranded.
Shin waƙoƙin sauti masu yawa za su iya tsira daga canji daga MP4 zuwa M4V?
+
Na'am — duk waƙoƙin sauti a cikin MP4 (waƙoƙin mai shiryawa, yarukan dabam, waƙoƙin bayani) ana kiyaye su a cikin M4V 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 M4V?
+
Subtitles soft (tracks da ake iya zãɓewa) suna tsira idan M4V 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 M4V na dauke da alamomin babi / DVD-style nasarar?
+
Metadata na babi na canja tsakanin MP4 da M4V 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 M4V 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 M4V?
+
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 M4V yana daure waɗannan maɓallan idan M4V 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 M4V ke amfani da shi bisa diff?
+
An zaɓi codec ɗin diff don ya haɗu da mai riƙe M4V 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 M4V?
+
Metadata na HDR na canzawa (HDR10 masu nuna kimar, matsakaicin matsakaicin matsakaici) yana tafiyar da M4V 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 M4V da ba ta da ɗakin DV yana daidaita zuwa HDR10.
Shin mai canza MP4 zuwa M4V 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 MP4 VFR yana tsira cikin M4V 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 M4V ga burin da ke da matsala.
Me yasa fayil ɗin M4V na ƙarami ne / ya fi girma fiye da MP4 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 MP4 (Blu-ray rip) zuwa low-bitrate M4V (web upload) shi ne dalilin da ya fi yawa na daina aiki.
