MP4 → M4A

Guqula Eyakho MP4 kuya M4A amafayela kalula

Khetha amafayela akho

noma cindezela bese ususa amafayela akho lapha

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

Guqula amafayela afinyelela ku-1 GB mahhala, abasebenzisi be-Pro bangaguqula amafayela afinyelela ku-100 GB; Bhalisa manje

Ukulayisha

Indlela yokuguqula MP4 kuya M4A

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 M4A amafayela

MP4 kuya M4A Imibuzo Evame Ukubuzwa Yokuguqulwa

Ngiyikhipha kanjani umsindo kusuka kuhele lami MP4 njenge M4A?

Layisha phezulu ihele MP4 futhi umguquli ukhipha umsindo, bese uguqula ikhodi liyi M4A. Akukho sikhathi sevidiyo sesibili - umsindo obonakalayo ususwa ngokushesha ngakho-ke ukukhishwa kusheshe kakhulu kunalokho okuphelele kokuphinde uguqule ikhodi. MP4 yi ISO/IEC 14496-14, ejwayelekile ngo-2001 futhi ivela ku-QuickTime box layout MOV isebenzisa. M4A yi MP4 ibhokisi elimaza umsindo kuphela, futhi lokhu iTunes, Apple Music kanye iPhone Voice Memos app kukhiqiza.

Ingabe ukushintsha MP4 kuya ku M4A kuyingxenye yesithathu yokucindezela okulahlekile?

Yebo, futhi kufanelekile ukuhlela. Izifomethi zombili ziyi-lossy, ngakho-ke i-M4A 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, uku-encoding i-M4A kusuka kulo kunciphisa ukudlula okuphindiwe ngokuphelele. Kuyinto encane kakhulu ukuthi wonke ama-MP4 aphilayo ayizividiyo ze-H.264 ezinesandi se-AAC; isiqoqi sigcina ngokusemthethweni i-HEVC, AV1 ne-VP9. M4A igcina i-AAC emibonweni eminingi, noma i-Apple Lossless (ALAC) uma ivela ku-lossless rip.

Ingabe ngiyiphawula i M4A ngemininingwane yomuntu odlalayo ne-album?

Yebo, futhi kuyinzuzo engokoqobo ngaphezulu kwe MP4, engeke ikwazi ukugcinwa kuphi naphi. M4A ifaka isihloko, umculi, i-album, unyaka, inani le-track kanye ne-cover art efakwe ngaphakathi kwebhokisi, ngakho-ke i-library yomculo ifaka ngokulungile ngaphandle kokufaka isandla. M4A igcina i-iTunes-style metadata, amasigaba kanye nemisebenzi yezandla egcwele, futhi iyifomethi yomsindo ovela ezweni lonke kunoma iyiphi idivayisi ye-Apple.

Yini i-bitrate yomsindo osetshenziswa yi-M4A ekhishwayo?

I-lossy M4A ikhodwe ku-192 kbps ngokuzenzakalela. Uhlelo lwekhwalithi yomsindo lunikeza futhi 320 kbps ukuqinisekisa ukhwalithi enhle kanye ne-128 kbps ukuqinisekisa ifayela elincane. I-lossless M4A (WAV, FLAC) i ignore i-bitrate futhi igcine yonke isampula.

Ingabe ngizolahlekelwa ubunjani besandi uma ngisuka ku MP4 kuya ku M4A?

Uma M4A ingekho lutho (WAV, FLAC), yonke isampula igcinwa ngokugcwele. Uma M4A ingekho lutho (MP3, AAC, OGG, Opus), i-M4A codec icindezela kabusha umsuka womsindo — ku-192 kbps imiphumela icacile cishe kuzo zonke izithako. Ukuya kwe-nothing → akukho lutho akugcini nje ngokubuyisela imininingwane ekhishwe.

Ingabe ngizokhipha umsindo kusuka ku MP4 amafayela amaningi kuya ku M4A ngeqembu elilodwa?

Amafayela amaningi emisebenzini eyodwa adinga iphrojekthi ekhokhelwa. Ukusetshenziswa okumahhala kuyisifayela esisodwa ngasinye sokuguqulwa, ukuguqulwa okufanayo ngehora. Kuphrojekthi ekhokhelwa ungangeza amafayela amaningi kumsebenzi owodwa, bese ulanda impendulo ngayinye yayo noma zonke ku-ZIP eyodwa.

Ingabe kuthatha isikhathi esingakanani ukukhishwa kwe M4A umsindo kusuka ku-MP4 wehora elilodwa?

Kuxhomekeka kubukhulu nesikhathi sohele. Amadokhumende amancane namasithombe avame ukulungiselelwa ngokushesha. Amavidiyo ade athatha isikhathi eside, ngoba amavidiyo aguqulwa aphinde akhode ifreyimu ngayinye.

Ingabe ngizokhipha kuphela isigaba se MP4 somsindo njenge M4A?

Akunalesi sisetshenziswa ngokuqondile — khipha umsindo wonke njenge M4A, bese usebenzisa /audio-trim/ noma /audio-cutter/ ukucisha inqwaba. Indlela yezinhlangothi ezimbili ivame ukuba isheshe kunalokho okwenziwayo futhi ikunikeza ukulawula okucacile kwe-waveform-level.

Ingabe ihele lami MP4 liyimfihlo ngesikhathi sokukhipha umsindo?

Yebo. Amafayela MP4 alayishwe phezulu aphathwa kumaseva ethu okuguqula, akukho muntu obhekana nawo, futhi angeke ahlukaniswe. Ukulayishwa kanye nokuguqulwa kwe M4A kususwa ngokuzenzakalela cishe amahora angu-24 ngemuva kokuguqulwa, okushiya isikhathi sokulanda imiphumela. Bona /privacy/ ukufinyelela kunqubomgomo egcwele.

Kungani ihele M4A linezingcindezi ezingenalutho lapho i MP4 ikhona umsindo?

Ngokuvamile i-MP4 ithatha ngaphezu kwe-track yomsindo eyodwa futhi enye eyaguqulwa ihlala ihlala ikhululekile noma iyisithathu. Umguquli ukhetha i-track yomsindo eyodwa ngokuzenzakalela, ngokuvamile i-one enkulu, futhi lekhasi alinazo izilungiselelo zokukhetha i-track eyahlukileyo. Uma i-one engekho iphuma, shintsha i-MP4 nge-track oyifunayo kuqala (i-VLC noma i-ffmpeg ingakwenza lokhu) bese uyiguqula futhi.

MP4

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

M4A

I-M4A ifomethi yefayela lomsindo ehlobene eduze ne-MP4. Inikeza ukucindezelwa komsindo kwekhwalithi ephezulu ngokusekelwa kwemethadatha, okuyenza ifanelekele izinhlelo zokusebenza ezihlukahlukene.