M4V Amathuluzi

Guqula M4V kuya futhi kusuka kumafomethi ahlukahlukene

Mayelana M4V

I-M4V ifomethi yefayela levidiyo eyakhiwe i-Apple. Ifana ne-MP4 futhi ijwayele ukusetshenziselwa ukudlalwa kwevidiyo kumadivayisi we-Apple.

Ukusetshenziswa Okuvamile

iTunes video
Apple TV content
Protected video

M4V Imibuzo Evame Ukubuzwa Yokuguqulwa

Yini ihele levidiyo le-M4V?

M4V yi-Apple's QuickTime container. I-iPhone, i-iPad ne-Mac zirekhoda ividiyo kwi-M4V ngokuzenzakalela. Ifomethi ixhasa i-H.264, HEVC, ProRes, ama-audio tracks amaningi, izihloko nezibonisi zesigaba. I-M4V igcina izibonisi zesigaba, umsebenzi wobuciko kanye nezingcingo zesihloko esingezansi ngendlela i-Apple TV app elindele ngayo, okujwayelekile MP4 kuvame ukulahlekelwa.

Ingabe ihele M4V lifana ne MP4 ngaphansi?

Isakhiwo sabo sifana kakhulu. M4V ikhiwa kusuka ku-ISO Base Media File Format box layout isebenzisa i-MP4 — umhlahlandlela we-atoms ogcina idatha yemidiya kanye ne-index ekhuluma lapho ifreyimu ngayinye iqala khona. Lokhu kusho ukuthi ukushintsha phakathi kwabo kuvame ukuba yi-rewrap ngaphezu kokuphinda-code: ama-streams akopiwe ngaphandle kokuchofoza futhi i-wrapper kuphela ibhalwe kabusha, okuthatha amasekondi ngisho kwifayela le-feature-length. M4V Apple's uhlobo MP4, esetshenziswa iTunes kanye Apple TV app for movies kanye TV iziqephu.

Kungani ama-oda efika njenge M4V?

Ngenxa yokuthi ifomu liyisitolo se-wrapper se-delivery, exhunywe kuma-apps ayo, futhi, ngezinto ezikhokhelwa, ku-akhawunti yakho. Lokhu kwenza kube lula ngaphakathi kwe-ecosystem futhi kube nzima ngaphandle kwayo. Amafayela angaxhunyiwe ku-akhawunti aguqulwa ngokujwayelekile; agcinwe angakwazi ukuvulwa yinoma iyiphi i-convertor, okuwumsebenzi ofuna ukuwuphatha we-format hhayi ukukhawulwa lapha.

Ingabe M4V ifana nefomethi njengenye ingqikithi yayo?

Yebo. Lezi zibanzi kanye negama elide noma elincane okubona ngakwesokudla lichaza uhlobo oluthile olungaphansi, futhi noma yini efunda noma ifunda zombili. Izibizo ezimbili ziyimlando: i-8-character filename limit from the DOS era, a vendor naming of its application rather than its file format, or two programs that simply defaulted differently. Converting either produces the same result, so use whatever extension the software at the other end is expecting.

Kungani isiphequluli sami singadlala ihele M4V?

Amabhuleki athumela ama-decoders kuluhlu oluncane lwefomethi, futhi M4V ayikho kulo — ilayisense, i-codec ehlukene evumela, noma nje ubudala bayo bugcina bungaphandle. Ihele alilahlekile futhi umdlali wedesktop uzovula, kodwa akukho okwenziwayo kukhasi kuzokwenza ibhuleki liyibonise. Ukushintsha ukuguqula kube nendawo yokugcinwa ye-web-native kuyindlela ethembekile kuphela yokudlala ngaphakathi. DRM-ikhuselwe M4V ukuthenga ngeke kushintshwe yinoma yini; kuphela M4V izithombe ezingakhuselwanga ziguqulwe, futhi abadlali Apple-ayikho njalo kufanele ubanzi kuthiwa.

Ingabe M4V izodlala kufoni noma TV ngaphandle kokushaya ibhayisikili?

Ngokuvamile, yebo, ngoba ama-chips efonini, ama-tablets nama-television afaka ikhophi le-payload e-silicon ekhethekile, hhayi kwi-processor eyinhloko. Lokhu kuyinkinga phakathi kwevidiyo edlala i-cool ngehora elilodwa nelinye elifaka ikhofi ledivayisi futhi liyihlanze imizuzu eyisithupha. lapho ifomu lihla khona, i-app ixhasa i-app, hhayi uku-decode — i-codec iyilungile, i-wrapper yilokho i-gallery app ingakanani. Ukuthuthukiswa M4V MP4 - H.264 noma HEVC nge AAC - nge optional Apple FairPlay DRM ne iTunes isiqephu metadata.

Ingabe M4V ikhishwa?

Akuyoba khona ngokuphambene, kodwa inkontileka yayo yefayela elisha ligcina lincane futhi amathuluzi ambalwa amasha akhathazeka ukuxhasa. Amafayela akhona ahlala efundeka isikhathi eside. Indawo esebenzayo ukuthi ukubeka ingobo yomlando kule fomethi kulungile, ngenkathi uqala umfutho womsebenzi omusha kuyo kusho uku accetta isethulo esincane kakhulu sesoftware.

Ingabe izihloko ezingezansi ngaphakathi kwe M4V zingakhethwa, noma ziboshwe ngaphakathi kwesithombe?

Kukhethwa, uma kufakwe kahle. M4V ifaka izihloko ezingezansi njengemithombo yabo ehlukile engezansi kwevidiyo, ngakho-ke umbukeli angashintsha ulwimi, azicishe, noma aphinde aphinde asebenzise izihloko ezingezansi kumdlali oxhasa lokhu. Izihloko ezingezansi ezibomvu zingasetshenziswa — ziyi-pixels kuphela kwifreyimu — kodwa zihlala njalo, futhi kungekho sizathu sokukhetha uma isiqukathi sixhasa into engokoqobo.

Kungani uguqula M4V ukuze ezinye ifomu video?

Gcina M4V MP4 uma ufuna ukusakaza jikelele - amabhuleki web, amadivayisi mobile, smart TVs kanye nokuhlela apps zonke dlala MP4 natively. Gcina WebM for web embedding lapho ncane ifile ubukhulu izinto. Gcina MOV uma usebenza Final Cut noma ezinye Apple-native imibhobho.

Ingabe ukuguquka kwe-M4V kuphinde kuhlanganise ividiyo?

Uma umsuka codec ngaphakathi M4V ihambisana nengxenye efanele isitoreji si remux ngaphandle kokuphinda-encoding (fast, lossless). Uma codec kufanele ushintshe (umzekelo HEVC to H.264) ividiyo iphinde-encoded — slower, ngemali encane ukukhiqizwa quality.