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 sake encode MP4 zuwa M4V ba tare da rasa ingancin bidiyo ba?
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Ka saukar da fayil ɗinka MP4 kuma mai canzawa zai yi aiki da wani CRF-da aka gina kan sake-sauya-kodi mai nufin fitarwa mai gani-ba-da-hasara M4V (CRF 18 bisa diff, ƙananan kimar = fitaccen fayil / mafi kyawun inganci). An zaɓi codec don ya haɗu da M4V ƙofar — H.264 don MP4 mai girma, H.265 don MKV mai girma, VP9 ga WebM, AV1 ga sabon pipes. A kusa da dukan MP4 a cikin daji ne H.264 bidiyo da AAC sauti; da kwandon kuma doka ke da 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?
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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?
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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?
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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.
Wanne codec na bidiyo ne fitarwa M4V take amfani dashi?
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Yana dogara ga kwandon M4V. MP4 na da ƙa'idodin H.264 domin mafi fadin goyon baya na wasa a kan wayoyin hannu, masu bincike, da Smart TVs. MKV na da ƙa'idodin H.265 / HEVC don kusan rabin girman fayil da inganci mai kama. WebM na da ƙa'idodin VP9. Zaɓuɓɓukan ci gaba suna nuna zaɓin codec mai bayyananne idan kana buƙatar canza shi.
Shin za'a iya canza waƙoƙina na sauti daga MP4 zuwa M4V?
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Yanzu. Idan MP4 da M4V sun raba wani codec na sauti (misala, suna da AAC), za'a sake-muxed sauti ba tare da sake-encoding ba - bit-identical. Idan codecs sun bambanta, za'a sake-encoding sauti zuwa AAC / Opus / Vorbis dangane da abin da ƙuƙuman M4V ke goyon baya. An riƙe sauti na shirye-shirye da yawa (koyarwar, harsuna daban-daban).
Shin zan iya riƙe ƙimar firam na farko idan na canja MP4 zuwa M4V?
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A matsayin diff, na'am — 24fps MP4 zai zauna 24fps a cikin M4V; 60fps MP4 zai zauna 60fps. Idan kana buƙatar canza adadin (misali, interlaced 29.97 → progressive 30, ko 60 → 30 don haɗe-haɗe), zaɓin adadin firam zai kula da 3:2 pulldown, deinterlacing, da frame-blending a cikin mataki na encoding guda.
Menene girman fayil ɗin da zai canza daga MP4 zuwa M4V?
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Re-mux na codec-daidai (MP4 H.264 → M4V H.264 kawai yana canja kwandon): kusan girman da ya daidaita. Canjin codec na iya yin tasiri: H.264 → H.265 na iya raba fayil zuwa rabin a matsayin ingancin gani; VP9 yana da daidaituwa; AV1 na yanke wani 20-30% amma yana da sauri wajen encoding.
Shin fayil M4V zai iya wasa a kan iPhone, Android, da Smart TVs?
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MP4 / H.264 yana wasa da asali akan kowane na'ura mai zamani. MOV / H.264 yana wasa a kan na'urorin Apple da yawa TV amma ba koyaushe ba a kan Android na daɗaɗɗen. MKV yana buƙatar VLC akan iOS. WebM shine mai bincike na farko. Zaɓuɓɓukan ci gaba sun haɗa da "haɗin kai na na'ura" da aka ƙayyade da ke zaɓar mafi aminci M4V codec / kwandon don manufarka.
Menene lokacin da za'a yi wa canja bidiyo mai awa 1 zuwa MP4 zuwa M4V?
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Re-mux na codec-daidai yana kusa da lokaci-da-lokaci - sakan 30 zuwa 60 ga fayil na sa'a 1. An sake-encode na codec-da-gaske yana tafiya a kusan 0.3-0.7x lokacin asali a kan GPU pipeline ɗinmu, don haka 1-hour MP4 → M4V ya ƙare cikin minti 18-40 dangane da daidaita da manufar codec.
Mene ne mafi girman ma'aunin rarraba da ake goyon baya ga MP4 zuwa M4V?
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Zuwa 8K (7680×4320) akan Premium plans. Free conversions are capped at 4K (3840×2160) by the per-file size limit. HDR metadata (HDR10, HDR10+, Dolby Vision when present) is carried through where both MP4 and M4V containers support it.
Shin MP4 bidiyo na na sirri ne yayin canjawa zuwa M4V?
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Yanzu. An yi amfani da fayilolin bidiyo da aka canza zuwa cikin aiki na musamman, ba a gani ba ta mutum, ba a sanya su cikin indiya ba, kuma an share su cikin mintina na kammalawa. An yi takardar tagar tsarewa a /privacy/ kuma ba mu wallafa wata ƙungiya ta koyarwar daga canzawa daga mai amfani ba.
