MP4 → M4R

Guqula Eyakho MP4 kuya M4R amafayela kalula

Khetha amafayela akho

noma cindezela bese ususa amafayela akho lapha

I-Free Plan: 1 Ukushintsha/ihora · Iya ngaphandle komkhawulo →

Tshintsha amafayela mahhala, Pro abasebenzisi bangaguqula amafayela amakhulu kakhulu; Bhala manje

Ukulayisha

Indlela yokuguqula MP4 kuya M4R

Isinyathelo 1: Layisha eyakho MP4 amafayela usebenzisa inkinobho engenhla noma ngokuhudula bese uphonsa.

Isinyathelo 2: Chofoza inkinobho ethi 'Guqula' ukuze uqale ukuguqulwa.

Isinyathelo 3: Landa i-version yakho M4R amafayela

MP4 kuya M4R Imibuzo Evame Ukubuzwa Yokuguqulwa

Ngiyikhipha kanjani umsindo kusuka kuhele lami MP4 njenge M4R?

Layisha phezulu ihele MP4 futhi umguquli u-demuxes umsindo, bese uguqula ikhodi liyi M4R. Akukho sinqumo sevidiyo sesibili - umsindo obonakalayo ususwa ngokushesha ngakho ukukhishwa kusheshe kakhulu kunalokho okuphelele kokuphinde ukhodwe. MP4 yi ISO/IEC 14496-14, ejwayelekile ngo-2001 futhi ivela ku-QuickTime box layout MOV isebenzisa. M4R yi-iPhone ringtone — ifayela elijwayelekile le-AAC ebhokisini le-MP4 nesiqephu esishintshiwe ukuze i-iTunes ifile njenge-tone.

Ingabe ukushintsha MP4 kuya ku M4R kuyingxenye yesithathu yokucindezela okulahlekile?

Yebo, futhi kufanelekile ukuhlela. Izifomethi zombili ziyi-lossy, ngakho-ke i-M4R encoder isebenza kusuka kumsindo osele udlulele engxenyeni eyodwa ye-psychoacoustic, futhi iziphakamiso zayo zihlanganisa isiqephu sokuqala. Ku-192 kbps noma ngaphezulu, imiphumela ihlala icacile kakhulu. Uma une-lossless master nganoma yikuphi, ukukopisha i-M4R kusuka kulo kunciphisa ukudluliswa okuphindiwe ngokuphelele. Kuyinto encane kakhulu ukuthi wonke ama-MP4 aphilayo ayizividiyo ze-H.264 ezinesandi se-AAC; isiqukathi sigcina ngokusemthethweni i-HEVC, AV1 ne-VP9. I-payload yi-AAC, ejwayelekile ifinyelela kumasekhondi angama-40, okungukuthi umsindo ophakathi nendawo iOS uzowuvuma.

Ingabe ngiyiphawula i M4R ngemininingwane yomuntu odlalayo ne-album?

Yebo, futhi kuyinzuzo engokoqobo ngaphezulu kwe MP4, engeke ikwazi ukugcinwa kuphi naphi. M4R ifaka isihloko, umculi, i-album, unyaka, inani le-track kanye ne-cover art efakwe ngaphakathi kwebhokisi, ngakho-ke i-library yomculo ifaka ngokulungile ngaphandle kokungena ngesandla. I-M4R iphuma ngokuqondile ku-iOS Sounds list nge-Finder noma i-iTunes ngaphandle kokusebenzisa okuningi.

Yini ekwenzeke kumsindo othile uma uguqula MP4 ku M4R?

Ihlolwe phansi ku-stereo, ngoba M4R ayinayo indlela esebenzayo ye-multichannel. Ukuxuba okuphansi kusetshenziswa izilinganiso ezijwayelekile ukuze umhlangano we-channel ephakathi uhlale ucacile futhi izingqimba zixhunywe ku-level ephansi. Noma yini esekelwe ku-channel ehlukile ihamba lapho lokhu kwenziwa. M4R i-Apple kuphela futhi ilinganiselwe ubude; noma yini engaphezu kwamasekondi angama-40 iphoqelwe ukulahleka yifoni.

Yini i-bitrate yomsindo osetshenziswa yi-M4R ekhishwayo?

Izinga lokungena elijwayelekile le-lossy M4R yi-192 kbps, elicacile kumculo. Ungayisusa ku-320 kbps (audiophile) noma 96-128 kbps (ubizo / podcast / ifayela elincane). Izinga lokungena eliphansi livela ezinketho eziphezulu ngaphambi kokuba ucofe uguqule.

Ingabe ngizolahlekelwa ukhwalithi yomsindo uma ngisuka ku MP4 kuya ku M4R?

Uma M4R ingekho emdlalweni (WAV, FLAC), yonke imibiko igcinwa ngokugcwele. Uma M4R ingekho emdlalweni (MP3, AAC, OGG, Opus), i M4R codec icindezela kabusha umsuka womsindo — ku-192 kbps imiphumela icacile kuzo zonke izithako. Ukuya nge-lossy → akukho emdlalweni akusho ukubuyisela imininingwane ekhishwe.

Ingabe i-M4R yomsindo igcina isilinganiso sosampula sangaphambilini?

Ngokungajwayelekile yebo — umsindo we-48 kHz ku MP4 wakho uhlala u-48 kHz ku-M4R kuphuma. Ukukhuphula i-CD noma ukuhambisana nomdlali odala ungakhuphula isampula ku-44.1 kHz ngesampula-rate dropdown; isampula ephindayo isezingeni eliphakeme le-SoX.

Ingabe ngingakwazi ukukhishwa umsindo kusuka kuhele MP4 ku M4R ngeqembu elilodwa?

Yebo — susa ifolda ye MP4 amafayela futhi sizokhipha umsindo ngokuhambisana. Abasebenzisi bepremium bathola abasebenza ngokuhambisana; kuhele olungu-50 lohlelo lokhu kuyinto ehlukile phakathi kwemizuzu emihlanu nemizuzu eyisithupha.

Ingabe i-M4R izophawulwa ngesihloko / umculi / i-album metadata?

Uma i MP4 ithatha isiqephu noma i-metadata yokuhamba, sikopa isihloko / umculi / ama-album ama-fields ngaphakathi kwe M4R ibhokisi. Uma kungenjalo, i M4R iphuma ingaphawuliwe - sebenzisa umhleli wesihloko (Mp3tag, Picard) ngemuva kokuthumela ngaphandle ukuphawula okunethezeka.

Ingabe kuthatha isikhathi esingakanani ukukhishwa kwe-M4R umsindo kusuka ku-MP4 ohora elilodwa?

Umsindo demux + ukukopela kushesha — 5 kuya ku-15% wesikhathi somthombo. Ihora le-1 MP4 → M4R liphele ngo-3 kuya ku-9 imizuzu ku-pipeline ejwayelekile; i-premium parallelism isusa lokhu ngaphezu kwemisebenzi yeqembu.

Ingabe ngizokhipha kuphela isigaba se-MP4 somsindo njenge-M4R?

Akukho kulolu thuluzi ngokuqondile — khipha umsindo wonke njenge M4R, bese usebenzisa /audio-trim/ noma /audio-cutter/ ukucisha inhlanganisela. Indlela yezinhlangothi ezimbili ivame ukukhawulela kunemisebenzi ehlangene futhi ikunikeza ukulawula okucacile kwe-waveform-level.

Ingabe ihele lami MP4 liyimfihlo ngesikhathi sokukhipha umsindo?

Yebo - imodeli yobumfihlo efanayo njengezo zonke iziguquko: abasebenza ngokuzimela, akukho ukuhlolwa komuntu, ukususwa okuzenzakalelayo ngaphakathi kwemizuzu yokuqedela. Ifasitela lokugcina eliphelele litholakala ku /privacy/.