M4V Amathuluzi

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Mayelana M4V

M4V is an Apple variant of MP4 that may carry FairPlay DRM, which is what stops some players from opening it.

Ukusetshenziswa Okuvamile

iTunes video
Apple TV content
Protected video

M4V Imibuzo Evame Ukubuzwa Yokuguqulwa

Yini ihele M4V?

M4V is an MPEG-4 video container format, similar to MP4 but may include DRM.

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 angavuliwa yinoma yimuphi umguquli, okungumsebenzi ofunayo we-format hhayi umkhawulo lapha.

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.

Ingabe ihele M4V ligcina ama-tracks omsindo amaningi?

Yebo - imixholo yesiNgisi, i-dub ne-comment ingahlala yonke kwifayela elilodwa ne-player eshintsha phakathi kwazo. Izinqumo ezimbili: amafoni amaningi nama-television adlalayo abonisa kuphela umculo wokuqala kodwa amanye akhona, futhi ukuguqulwa kufomethi ngaphandle kosizo olukhulu lwe-tracks agcina umculo owodwa futhi akhuphula okunye. Khetha umculo ofuna ngaphambi kokuguqula, ngaphezu kokubheka emuva ukuthi iyiphi ehlala. I-M4V igcina izibonisi zesigaba, umsebenzi wobuciko kanye nezingcingo zesihloko esingezansi ngendlela i-Apple TV app elindele ngayo, okujwayelekile MP4 kuvame ukulahlekelwa.

Ingabe ngidinga iMac ukusebenza namafayela M4V?

Akuna. Ifomethi yavela Apple futhi yilokho izinhlelo zayo nesoftware kukhiqiza ngokuzenzakalela, kodwa amafayela ngokwawo zivamile futhi ukufunda kahle elsewhere ngethuluzi elifanele. Ukushintsha lapha kwenzeka kuseva, ngakho akukho QuickTime ukufakela, akukho Apple hardware futhi akukho platform-specific codec pack ihlobene nanoma kuphi kwinqubo.

Ingabe M4V igcina izibonisi zesigaba?

Ikwenza — amasigaba ahlala kwi-metadata yebhokisi, ngakho ukurekhodwa okude kungafinyelelwa ngengxenye endaweni yokudonsa ibha yokuqhubekela phambili. Baphila ngokucindezela kabusha kufomethi ehlukile yesigaba esizizwayo futhi bakhuphuka, ngokuzizwayo, ngenye engakholeki. Uma amasigaba abalulekile, lokhu kufanelekile ukubheka ngaphambi kokukhetha ifomethi yesingeniso endaweni yokuya ngemuva.

Ingabe ukusebenzisa M4V kuthatha ilayisense lepatenti?

Akunakho okukudingayo. Ama-codecs ahlobene ahlobene ne-patent pools, futhi ilayisense libekwe ngabantu abathumela ama-decoders — ifoni, i-browser, i-operating system — isikhathi eside ngaphambi kokuba ihele lifike kuwe. Lokhu kusho ukuthi ifomu likhona kuwo wonke amahardware futhi kungani ama-royalty-free alternatives akhona, futhi ashintshanga noma yini mayelana nokushintsha ifayela oline.

Ingabe ngingenza ngiphinde ngibize isiqephu endaweni yokushintsha M4V?

Kunzima kakhulu, futhi kufanelekile ukuqonda ukuthi kungani: isithonjana siyisihloko, ngenkathi ama-bytes ngaphakathi kufakwe ngefomethi eyodwa ekhethekile. Ukushintsha igama kwenza ihele igama lakhe lithembisa okuthile okuqukethwe kwayo akusho ukunikela, futhi noma yini evula ihele noma liyiphoqa noma liyifunda kabi. Ukuphela kwephutha elincane yifomethi ezimbili ezikhona ngokusemthethweni ibhokisi elifanayo ngaphansi kwezinhlamvu ezahlukene — futhi ngisho lapho ukuphinda uphinde