M4V → MP4

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Kukweza

Momwe mungasinthire M4V ku MP4

Gawo 1: Kwezani yanu M4V mafayilo pogwiritsa ntchito batani lomwe lili pamwambapa kapena pokoka ndi kugwetsa.

Gawo 2: Dinani batani la 'Convert' kuti muyambe kusintha.

Gawo 3: Tsitsani pulogalamu yanu yosinthidwa MP4 mafayilo

M4V ku MP4 Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu

Kodi ndingasinthire bwanji M4V kupita ku MP4 popanda kubwezeretsa kanema wa kanema?

Ngati ma kontena a M4V ndi MP4 angagwiritse ntchito codec yomweyo (H.264, H.265, VP9, AV1), wosintha amabwerera ku remuxer: ma streams oyamba amakopedwa ndi byte-by-byte ku MP4 kontena ndipo amasintha kokha. Remux ya 1 GB M4V ku MP4 nthawi zambiri imatha m'masekondi a 5-15 ndi kuwonongeka kwabwino. Structurally M4V ndi MP4 - H.264 kapena HEVC ndi AAC - ndi osankhika Apple FairPlay DRM ndi iTunes bokosi metadata. Zikuoneka kuti pafupifupi aliyense MP4 m'munda ndi H.264 kanema ndi AAC audio; chidebenso mwalamulo ali HEVC, AV1 ndi VP9.

Kodi M4V ingasinthidwe ku MP4 popanda kubwezeretsa kanema?

Ndikugwirizana ndi ma DVD a 4K, ndipo ndi njira yofulumira. M4V ndi MP4 amagawana bokosi lofanana lokhala ndi bokosi, kotero mavidiyo ndi ma audio streams amakopedwa m'ma byte-by-byte ndipo ma container wrapper okha amalembanso. Sichidzatha kusinthidwa ndipo sichidzasinthidwa, kotero fayilo ya feature-length imatha m'maola angapo m'malo mwa maola awiri, ndi mtundu wa output womwe uli ndi mtundu wofanana ndi wopanga. M4V ndi mtundu wa Apple wa MP4, ntchito ndi iTunes ndi Apple TV app kwa mafilimu ndi TV ziwonetsero za. MP4 ndi ISO / IEC 14496-14, standardized mu 2001 ndi anachokera pamodzi QuickTime katundu layout MOV ntchito.

My M4V ili ndi maudindo ambiri - kodi onse amapita ku MP4?

Sizotsimikizika. M4V imasunga ma audio ambiri monga ma tracks achiwiri, koma MP4 kusewera kuthandizira pambuyo pa gawo loyamba ndilopanda malire, kotero ambiri osewera adzawonetsa imodzi. Sankhani gawo lomwe mukufuna poyamba; ena amaphunzitsidwa bwino ku mafayilo awo oyambirira kuposa kuchoka m'chipinda chokhala ndi ma CD omwe amawateteza. M4V amasunga Chapter olemba, ntchito zojambulajambula ndi subtitle nyimbo mu mawonekedwe a Apple TV app amayembekezera, amene MP4 mosavuta nthawi zambiri amawononga. MP4 amathandiza okha imodzi yotchuka subtitle mtundu (mov_text), ndi multi-traka audio ndi osati olimba m'malo desiki osewera.

Nchifukwa chiyani fayilo yanga M4V siyisintha kukhala MP4?

Zina M4V mafayilo amasinthidwa pa level bitstream ndi sitolo kapena pulogalamu yomwe idatulutsa, ndipo kusinthidwa kwa encrypted stream sikungathe kusinthidwa ndi ife kapena ndi chilichonse popanda chida cha lisensi. Fayilo yomwe mwalemba, kutumiza kunja kapena kutsitsa osatetezedwa imasintha bwino; kugula kwa licensed sichidzachitika, ndipo palibe wosintha yemwe anganene mosasamala kanthu. DRM-kuteteza M4V kugula sangakhale anasinthidwa ndi chilichonse; okha unprotected M4V owona ndi convertable, ndi non-Apple osewera nthawi zambiri ayenera kuwonjezeka anasintha dzina.

Kodi MP4 idzasewera mu browser pamene M4V siyidzachita?

Ndikofunika, ndipo nthawi zambiri ndichifukwa cha kusintha. A M4V wophatikizidwa mu tsamba la webusaiti amasonyeza wosewera wowonongeka kapena kutsitsa, chifukwa masamba a browsers samapereka decoder kwa iye. MP4 amasewera m'masamba mwanjira ya HTML5 video element popanda plugin ndi pulogalamu yakunja. MP4 ndi otetezeka zotheka kutumiza zolinga - aliyense foni, browser, console, wolemba ndi Smart TV anamanga mu zaka zapitazi amasewera izo popanda mapulogalamu atsopano.

Kodi ma audio ambiri adzapulumuka kusinthidwa kwa M4V kupita ku MP4?

Ndikoyenera - zonse zolemba za audio mu M4V (kuwunika kwa woyang'anira, mabungwe osiyanasiyana, mawu ofotokoza) amasungidwa mu MP4 pamene chikwama chofunikira chimathandizira ma audio ambiri. MKV ndi MOV amayendetsa ma audio osatha; MP4 amathandizira ambiri koma ena osewera a hardware amawona kokha track 1; WebM imatha pa Opus / Vorbis track.

Kodi ma subtitle amasunga zosunga pamene M4V amasinthidwa kuti MP4?

Ma subtitle olimba (ma tracks osankhika) amapulumuka pamene MP4 angawagwiritse ntchito: MKV amagwiritsa ntchito SRT, ASS, SSA, PGS, VobSub mwachilengedwe; MP4 amagwiritsa ntchito mov_text (format yosasinthasintha). Kusintha MKV ndi subs a ASS ku MP4 kumawawononga kuti akhale mov_text kapena kuwalemba. Hardsubs (olembana mu kanema) amagwiritsa ntchito ngakhale.

Kodi M4V mpaka MP4 amasunga masamba olemba / kuyendera kwa DVD?

Metadata ya bokosi limasintha pakati pa M4V ndi MP4 pamenepo onse awiri amapereka bokosi la atomu (MKV, MP4, MOV). WebM imasunga bokosi m'ma block ogwirizana ndi Matroska, choncho MKV <-> WebM bokosi limayenda molimba. AVI sichimakhala ndi bokosi la spec, choncho kusintha kwa AVI ku MP4 kumabweretsa fayilo yosasinthika ngati simuwonjezera ma markers m'manja.

Kodi ndi chiyani za MKV zowonjezera (fonti, kusindikiza) pamene mukupita M4V ku MP4?

MKV ndi yokha mainstream yokhala ndi ma fayilo ophatikizidwa (TTF fonts for ASS subs, JPG cover art, fan-translated PDF inserts). Kuchokera ku M4V kupita ku MP4 kumachotsa ma attachments pamene MP4 si MKV - ma streams elementary amasinthidwa, koma payload ophatikizidwa amakhala m'malo ochokera. Tengani M4V ngati chitetezo ngati mumatengera ma fonts ophatikizidwa.

Kodi codec yomwe MP4 imagwiritsa ntchito ndi yosasinthika?

Kodiyi ya default imasankhidwa kuti igwirizane ndi MP4 yokhala ndi katundu: MKV imasinthidwa kukhala H.265 (HEVC) kuti ikhale yolimba kwambiri; MP4 imasinthidwa kukhala H.264 kuti ikhale yolimba kwambiri; WebM imasinthidwa kukhala VP9; AVI imagwiritsa ntchito MPEG-4 ASP (DivX / Xvid linage).

Kodi HDR (HDR10, Dolby Vision) imatha bwanji M4V mpaka MP4?

HDR static metadata (HDR10 mastering display values, max content light level) imatha kupita ku MP4 pamene ma kontena awiri ndi codec osankhidwa amathandizira (HEVC, AV1 mu MKV / MP4). Dolby Vision ndi wolimba kwambiri - DV profile 5 / 7 / 8.1 mu M4V nthawi zambiri amapulumuka okha ku MKV ndi HEVC; kusinthidwa ku MP4 kontena lomwe silitha kunyamula gawo la DV limatha ku HDR10.

Kodi wosinthira M4V mpaka MP4 adzasunga kusinthasintha kwa framerate (VFR)?

MKV ndi WebM amalemba ma timestamps a real-frame ndi kuwongolera VFR mwanjira yachibadwa, kotero kuti M4V VFR imatha kukhala ndi MP4 ya mafomuwa popanda kubwezeretsa. MP4 imasunga nthawi yowonjezerapo koma ena osewera amaganiza kuti CFR; wosintha amatulutsa "kulepheretsa CFR" kuti abwezeretse VFR M4V ku 24 / 30 / 60 fps MP4 kwa zolinga zosatheka.