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 MP4 fayiloli
MPG zuwa MP4 Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan sake enkoɗa MPG zuwa MP4 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 MP4 (CRF 18 bisa diff, ƙananan kimar = fitaccen fayil / mafi kyawun inganci). An zaɓi codec don ya haɗu da MP4 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 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.
Na MPG bidiyo na nuna layin-ciki a kan motsi - shin wannan zai iya kaiwa cikin MP4?
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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 MP4. 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. MP4 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.
Ina da MPG dauke da wasu waƙoƙin sauti - shin za su iya tsira cikin MP4?
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Ba da aminci ba. MPG na adana saƙon sauti na daban kamar waƙoƙin farko, amma MP4 na goyan baya wa wasa bayan waƙoƙin farko yana da rashin daidaito, don haka mafi yawan masu wasa za su nuna ɗaya kawai. Zaɓi waƙoƙin da kake so a gaskiya kafin ka canja; wasu za'a fi kyau a fitar da su zuwa fayilolinsu na musamman fiye da barinsu cikin wani kwandon da ke ɓoye su. MPG shi ne fassara na DVD mai rubuta kayan aikin, da kamfen ɗin da aka fi sani da kuma kayan aikin shiga watsawa suna ganewa, don haka yana da amfani ga waɗannan maɓuɓɓugar ruwa. MP4 na goyon bayan wani nau'in rubutu na ƙarshe kawai (mov_text), kuma sauti mai layuka da yawa ba a yarda da shi ba a waje da masu wasa na kwamfyuta.
Shin, za a yi wasa da MP4 a cikin wani shafukai idan MPG bai yi ba?
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Yanzu, wannan shi ne dalilin da ya sa aka yi wannan canji. MPG da aka saka cikin wani shafi na yanar gizo yana nuna wani mai wasa da ya karya ko kuma yana tilasta wani saukewa, saboda masu bincike ba su da wani mai decoder don shi. MP4 yana wasa cikin layin ta hanyar ɓangaren bidiyo na HTML5 na asali ba tare da wata ƙara ba da kuma ba tare da wata shirin ayuka na waje ba. 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.
Mene ne codec ɗin bidiyo da fitarwa MP4 take amfani dashi?
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Yana dogara ga abin da ke cikin MP4. 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. MP4 ne ISO/IEC 14496-14, standardized a cikin 2001 da kuma dauke daga irin QuickTime akwatin zane MOV amfani.
Shin waƙoƙina na sauti za su iya tsira daga canji daga MPG zuwa MP4?
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Na'am. Idan MPG da MP4 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 MP4 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 MP4?
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A bisa diff, na'am — 24fps MPG zai zauna 24fps a cikin MP4; 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 MP4?
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Re-mux na codec-daidai (MPG H.264 → MP4 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 MP4 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 MP4 codec / kwandon don manufarka.
Menene lokacin da ake buƙata don canja bidiyo mai awa 1 daga MPG zuwa MP4?
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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 → MP4 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 MP4?
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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 MP4 containers support it.
