Guqula AAC kuya M4A

Guqula Eyakho AAC kuya M4A amadokhumende ngokulula

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Indlela yokuguqula AAC kuya M4A

Isinyathelo 1: Layisha eyakho AAC 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

AAC kuya M4A Imibuzo Evame Ukubuzwa Yokuguqulwa

Yini oyenzayo i-AAC kuya ku-M4A umguquli womsindo?

It re-encodes a AAC audio file as M4A. Sample rate and channel count are preserved; the difference is the codec and container.

Ingabe isilinganiso sesampula kanye nesimo sesixhumi sigcinwa?

Ngephutha yebo — i-stereo ihlala i-stereo, isilinganiso sesampula sakuqala (44.1 kHz, 48 kHz, njll.) sithunyelwe ku-M4A output.

Ingabe AAC kuya ku M4A ukuguqulwa kubuyiselwa emuva?

Ungaguqula i-M4A emuva ku-AAC kule site. Uma ifomethi eyodwa ilahlekile, i-round-trip ayilungile noma ngabe ibukeka noma izwakala ifana.

Yini ikhwalithi yesipiliyoni okufanele ngilinde kusuka ku-AAC kuya ku-M4A?

Izilungiselelo ezizenzakalelayo zidinga ukusakazwa / ukhwalithi ye-web — ngokubona kufana nomthombo weningi labasebenzisi. Ukusetshenziswa kwegobolondo, khetha ukhetho lwekhwalithi ephezulu kuzinhlelo zokushintsha.

Ingabe ukushintsha AAC kuya ku M4A kuzophinde kuhlanganise umsindo?

Akunasidingo. AAC ne M4A zithwala umsindo kusuka kulowo mqokodisi - ohlukile wukuthi u-wrapper ojikeleze - ngakho amafreyimu aqokiwe akopiwe ngaphandle kokuchofoza futhi okukodwa okubhalwe phezulu ne-tag block kubhalwe kabusha. Akukho lutho oluqokwayo, akukho lutho oluphinde lucindezelwe, futhi okuphumayo yi-bit-identical audio kwisiqingatha ngaphezu kwemizuzu. Okubaluleke kakhulu kunalokho okuzwakalayo: wonke ama-re-encoding angempela we-lossy audio abiza umgangatho ongaphinde ubuyiselwe, ngakho-ke ukuguqulwa okungakwazi ukuvimbela umuntu kufanele uhlale ukhona. M4A yi MP4 ibhokisi elimaza umsindo kuphela, futhi lokhu iTunes, Apple Music kanye iPhone Voice Memos app kukhiqiza.

Ingabe ukushintsha AAC 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 esinye isikhala se-psychoacoustic, futhi iziphakamiso zayo zihlanganisa isiqephu sokuqala. Ku-192 kbps noma ngaphezulu, imiphumela ihlala icacile kakhulu. Uma une master engalahlekelwa yilutho, ukukopisha i M4A kusuka lapho kunciphisa isikhala esimibili ngokuphelele. I-AAC ilahlekelwa yizinto kodwa isebenza kahle kunayo i-MP3, futhi iphatha kuze kube yi-48 channels ngokusemthethweni ngaphezu kokuboshwa ku-stereo design. M4A igcina i-AAC emibonweni eminingi, noma i-Apple Lossless (ALAC) uma ivela ku-lossless rip.

Yini okushoyo ihele M4A?

Ibhokisi lemisindo ngaphakathi kwalo, hhayi i-audio ngokwayo. Lo mbhalo ongeziwe uhlala lapho ubude, umbiko wokufuna kanye nanoma yimiphi imininingwane ye-metadata ifomu lichaza khona, ngakho umdlali ungazi ukuthi i M4A ihlala isikhathi esingakanani ngaphambi kokuqothula ifremu eyodwa endaweni yokuskena ihele lonke ukuze ufunde. Lokhu kusho futhi ukuthi ubukhulu abukwazi ukuxazulula okungaphakathi: amabhokisi amaningi anjalo avunyelwe ukuphatha okungaphezu kwehlobo elinye lomsindo, ngakho amafayela amabili M4A angasebenza ngendlela ehlukile ngenkathi ebona ngokufana ngaphandle.

Kungani ifoni yami noma ithebhulethi irekhoda ku AAC?

Ngenxa yokuthi yilokho okukhiqizwa yi-hardware encoder kwidivayisi. Amamemo omsindo, ukurekhodwa kwesikrini kanye ne-audio track yenoma yini efilmwe kwifoni iphuma njenge AAC ngaphandle komuntu okhetha lokhu, ngakho-ke amafayela amaningi afika kulo futhi kungani ukhwalithi ingcono kunesayizi yefayela ebonisa. Akukho lutho oluzomisa ukuguquka; kusho ukuthi umsuka ukhonjiswa kathathu, yi-chip elungele impilo yebhethri ngaphezu kokungafani. I-AAC iyi-Advanced Audio Coding, ejwayelekile ngo-1997 njenge-MPEG-2 Part 7 futhi ifakwe ngokucacile ukushintsha i-MP3.

Ingabe kunelayisense exhunywe ku AAC?

Akuna omunye ongacabanga ngawo. I-codec ifakwe iziqukathi zepatenti, futhi ilayisense ibekwe ngumuntu othumela umbhalo oguquliwe — ifoni, i-browser, i-operating system — isikhathi eside ngaphambi kokuba ifayela lifike kuwe. Lokhu kusho ukuthi ifomu likhona kuwo wonke amahardware, futhi kungani izinketho ezingenazo i-royalty zikhiwa. Akunalutho olushintshayo mayelana nokushintsha ifayela olizithola, futhi kuyimibuzo ephilayo uma uthumela umbhalo oguquliwe wena.

Ingabe M4A ifomethi ye-Apple kuphela?

Kuvela ku-Apple futhi kuyeka khona. M4A yilokho i-Music app ne-iTunes Store ehlala khona, ngakho-ke kuyiphutha kunoma iyiphi idivayisi ye-Apple nokuthi kungani isibonisi sifunda njenge-Apple — kodwa isibonisi esingezansi siyisimo esivulekile, futhi yonke ifoni yamanje, isiphequluli, isimoto seyunithi yekhanda kanye nomdlali wemidiya ufunde. Akukho lutho olungenayo ukufakela futhi akukho isofthiwe ye-Apple ehlobene nokukhiqiza enye lapha.

Ingabe kunesikhawulo sobukhulu befayela uma uguqula i-AAC ibe yi-M4A?

Ukuthunyelwa okungaziwa kuvunyelwe ngokuzenzakalela; ama-akhawunti abhalisiwe amahhala athola umkhawulo ophezulu, futhi ama-akhawunti we-Pro angeke abe ne-limit yefayela ngalinye. Umlando wesiphequluli uvame ukuba ngumkhawulo osebenzayo ngaphambi kokuba umkhawulo wethu we-server-side uqale.

Ingabe ngingenza ukuguqulwa kwe-batch kwefayela le-AAC elilodwa libe yi-M4A?

Yebo. Thola noma khetha amafayela amaningi we-AAC ku-upload eyodwa — umguquli usebenza ngazo ngokufanayo futhi ubuyisela i-ZIP yemiphumela ye-M4A. Akunasidingo sokuphinda isikhashana sokufaka ihele ngalinye.