MP4 Amathuluzi

Tshintsha MP4 kuya futhi kusuka kumafomethi ahlukahlukene

Mayelana MP4

Ifomethi yesitsha se-MP4 ingagcina ividiyo, umsindo, imibhalo engezansi, nezithombe kufayela elilodwa ngokucindezela okuhle kakhulu.

Ukusetshenziswa Okuvamile

Ukubuka amavidiyo kumakhompyutha nakumadivayisi eselula
Ukusakaza okuqukethwe kwevidiyo ku-inthanethi
Ukwabelana ngamavidiyo ezinkundleni zokuxhumana

MP4 Imibuzo Evame Ukubuzwa Yokuguqulwa

Yini ihele levidiyo le-MP4?

I-MP4 iyibhokisi levidiyo eligcina i-video stream eyodwa noma eziningi, ama-tracks omsindo, kanye ne-subtitles ekhethiwe. Ibhokisi levidiyo lisekela ama-codecs ahlukene, ngakho-ke ukuhambisana kuxhomekeka ku-wrapper kanye nokuthi yini ngaphakathi. Kuyinto encane kakhulu ukuthi wonke ama-MP4 aphilayo ayizividiyo ze-H.264 ezinesandi se-AAC; isiqukathi sigcina ngokusemthethweni i-HEVC, AV1 ne-VP9.

Kungani wonke amasayithi nesistimu ecela i-MP4 ngokukhethekile?

MP4 yi ISO standard hhayi i-format ye-vendor, hardware decoders for its usual payload ship in every phone, console, browser and television sold in the last decade, and every editor and upload form accepts it. Nothing else has that reach, which is why MP4 is the sensible default output for anything that has to simply work. MP4 iyinjongo ephephile yokulethwa - yonke ifoni, i-browser, i-console, umhleli ne-Smart TV eyenziwe eminyakeni eyisithupha edlule idlala ngaphandle kwesoftware engeziwe.

Kungani ifoni yami igcina konke njenge MP4?

Ngenxa yokuthi i-handset ikhonjiswa kunoma yini i-chip yayo eyenza kwi-hardware, futhi MP4 yilokho okuhlelwe ngaso i-silicon. Ikhamera i-app ayibuzanga — ibhala ifomu elisetshenziswa likwazi ukulikhiqiza ngezinga lefreyimu eligcwele ngaphandle kokufudumeza. Ukushintsha ngemuva kujwayelekile futhi akudingeki lutho kukhwalithi uma ukhetha okudingayo okugcina u-payload ofanayo. MP4 yi ISO/IEC 14496-14, ejwayelekile ngo-2001 futhi ivela ku-QuickTime box layout MOV isebenzisa.

Ingabe ngidlala MP4 ku-tab yesiphequluli ngaphandle kokufaka noma yini?

Yebo — MP4 yisinye sezifomethi zevidiyo ezincane ezixhunywe ku-browser, ngakho-ke ukushaya ifayela kwi-tab noma ukulifaka kukhasi kusebenza kuphela kudesktop neselula. Lokhu kwenza kube yisinqumo esifanele sokudlalwa okuzenzakalelayo kwekhasi lewebhu, futhi yisizathu sokuguqulwa kulolu hlobo lwefayela kuvame ukuxazululwa ngokushesha "ividiyo ayizodlala kuwebhusayithi yami".

Ingabe izihloko ezingezansi ngaphakathi kwe MP4 zingakhethwa, noma ziboshwe kwisithombe?

Kukhethwa, uma kufakwe kahle. MP4 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 akuyona isizathu sokukhetha uma isiqulatho sixhasa into engokoqobo.

Kungani i-audio track eyodwa kuphela ehlala e MP4 yami?

Ngenxa yokuthi lokhu konke ifomu liyithatha ngokunethezeka. Izinhlamvu zomsindo ezingeziwe zingabhalwa ku MP4, kodwa ukuxhaswa kokudlala ngemuva kokuqala akulingani kahle kakhulu ukuthi amathuluzi amaningi agcina kuphela elinye futhi asuse ezinye. Uma umsuka unesihloko noma ulwimi lwesibili, khipha lezi ukuze uhlukanise amafayela omsindo ngaphandle kokuthembela kuwo kubhokisi elifihlayo. I-MP4 isekela kuphela ifomu elilodwa lesihloko esihlonishwa kakhulu (mov_text), futhi umsindo we-multi-track awuthembeki ngaphandle kwama-players wedesktop.

Ingabe ukusebenzisa MP4 kuthatha ilayisense lepatenti?

Akunakho okukudingayo. Ama-codecs ahlobene ahlobene ne-patent pools, futhi ilayisense ibekwe 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 nokushintshana kwefayela oline.

Ingabe ngingenza ngiphinde ngibize isiqephu endaweni yokushintsha MP4?

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 ubhale kahle kuphephile kunalokho ukushintsha igama.

Kungani uguqula MP4 kufomethi yevidiyo enye?

Gcina MP4 uma ufuna ukulalela jikelele - web browsers, amadivayisi eselula, smart TVs kanye nokuhlela apps wonke adlala MP4 natively. Gcina WebM for web embedding lapho ncane ifile ubukhulu izinto. Gcina MOV lapho usebenza Final Cut noma ezinye Apple-native imibhobho.

Ingabe ukuguquka kwe-MP4 kuphinde kuhlanganise ividiyo?

Uma umsuka codec ngaphakathi MP4 ihambisana nengxenye efanele isitoreji si remux ngaphandle kabusha-encoding (khawulela, lossless). Uma codec kufanele ushintshe (umzekelo HEVC ukuya H.264) ividiyo iphinde-encoded — ehamba kancane, ngezindleko ezincane ukukhiqizwa quality.