Mataki na 1: Loda naka MPG 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
MPG zuwa M4V Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan sake enkoɗa MPG zuwa M4V ba tare da rasa ingancin bidiyo ba?
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Ka saukar da fayil ɗinka MPG 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. Abin da ke cikin shi ne MPEG-1 ko MPEG-2 bidiyo da MP2 sauti; muxing da GOP tsari suna daidai da fayil na.mpeg. A cikin tsari, M4V shi ne MP4 — H.264 ko HEVC tare da AAC — tare da zaɓaɓɓen Apple FairPlay DRM da iTunes sashe metadata.
Na MPG bidiyo na nuna layin-ciki a kan motsi - shin wannan zai iya kaiwa cikin M4V?
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Zai yi sai ka yi deinterlace, kuma MPG abun ciki yakan yi interlace saboda wannan sifar ta zo daga zamanin watsa labarai da DVD. Frames na interlaced suna adana fannoni biyu na rabin tsayi da aka kama da kashi goma sha biyu na sakan; akan wani wayar hannu ko allon da ke da tsarin progressive-scan wanda yake karantawa kamar wani latsawa a kan duk abin da ke motsi. Ka kunna zaɓin deinterlace kuma mai yanka zai yi waƙa da fannoni cikin dukkanin frame na progressive kafin ya rubuta M4V. MPG shi ne irin shirin MPEG na ruwa kamar yadda.mpeg — wannan fassara ta uku-alƙawari ne DOS-era truncation, ba wani daban format.
Yanzu. MPG ba ta da wata hanyar amfani da zanen-rubutun-ƙasa ba, don haka an buɗe zanen-rubutun ga MPG abun ciki cikin hoton ko kuma an aika da shi kamar fayil na daban. M4V yana da zanen-rubutun kamar yadda zanen-rubutun na su na iya zabar ruwa, don haka bayan canjawa zaka iya haɗa wata hanyar SRT da mai kallo zai iya kunnawa, da kashewa ko kuma sake fasalin.
Shin M4V na goyon bayan alamun shafi da MPG 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. MPG 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 yana da kyau a canja wa MPG da aka riga aka yi zuwa M4V?
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Ga duk abin da kake son kiyayewa, na'am. MPG yana da alaka da wani zamani na baya na kayan aikin bidiyo kuma kayan aikin da ke karanta shi yana faruwa da sauri daga wayoyin hannu, masu bincike da tsarin aiki. Motsa bidiyo zuwa M4V yanzu, yayin da mai decoder mai tsafta ke nan, shi ne bambanci tsakanin wata arshiya da zaka iya buɗewa cikin shekaru goma da wata da ba za ka iya buɗewa ba. MPG na riƙe da duk wani MPEG-2 da ya ƙunshi - bitrate mai nauyi, interlacing, ba da softsubs - da kuma damuwa na biyu faɗaɗawa ga daya format.
Mene ne codec ɗin bidiyo da fitarwa M4V take amfani dashi?
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Yana dogara ga abin da ke cikin M4V. MP4 na da diff zuwa H.264 domin mafi fadin goyon baya na wasa a kan wayoyin hannu, na'urorin bincike, da Smart TVs. MKV na da diff zuwa H.265 / HEVC don kusan rabin girman fayil da inganci mai kama da. WebM na da diff zuwa VP9. Zaɓuɓɓukan ci gaba suna nuna zaɓin codec mai bayyananne idan kana buƙatar sake shi. 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 waƙoƙina na sauti za su iya tsira daga canji daga MPG zuwa M4V?
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Na'am. Idan MPG da M4V suna raba codec na sauti (misal, suna da AAC), za'a sake-muxed sauti ba tare da sake-encode ba - bit-identical. Idan codecs sun bambanta, za'a sake-encode sauti zuwa AAC / Opus / Vorbis dangane da abin da mai riƙe da M4V ke goyon baya. An kiyaye sauti mai layuka da yawa (waƙoƙin sharhi, yarukan dabam-dabam).
Shin zan iya riƙe ƙimar firam na asali idan na canja MPG zuwa M4V?
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A bisa diff, na'am — 24fps MPG zai zauna 24fps a cikin M4V; 60fps MPG zai zauna 60fps. Idan kana buƙatar canza adadin (misali, interlaced 29.97 → progressive 30, ko 60 → 30 don iyakancewar aikawa), zaɓin adadin firam na kula da 3:2 pulldown, deinterlacing, da kuma haɗe-firam a cikin mataki ɗaya na encoding.
Menene girman fayil ɗin zai canza daga MPG zuwa M4V?
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Re-mux na codec-daidai (MPG H.264 → M4V H.264 kawai yana canja kwandon): girman da ya fi daidai. Canjin codec na iya sauya sosai: H.264 → H.265 na iya raba fayil zuwa rabinsa da ingancin gani na daidai; VP9 yana da kama da haka; 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 a kan kowane na'ura mai zaman kansa. MOV / H.264 yana wasa a kan na'urorin Apple da TVs 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 farko wanda ke zaɓar mafi aminci M4V codec / kwandon don manufarka. 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.
Menene lokacin da ake buƙata don canja bidiyo mai awa 1 daga MPG zuwa M4V?
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Same-codec re-mux yana kusa da lokaci-da-lokaci — sakan 30 zuwa 60 ga fayil na sa'a 1. Full codec re-encode yana tafiyar da kusan 0.3-0.7x lokacin asali a kan GPU pipeline ɗinmu, don haka sa'a 1 MPG → M4V ya ƙare cikin minti 18-40 dangane da daidaita da manufar codec.
Mene ne mafi girman ma'ana da ake goyon baya ga MPG zuwa M4V?
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Har 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 MPG and M4V containers support it.
