Guqula AAC ukuba M4A

Guqula Eyakho AAC ukuba M4A uxwebhu

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Indlela yokuguqula AAC ukuba M4A

Inyathelo 1: Layisha eyakho AAC iifayile usebenzisa iqhosha elingasentla okanye ngokutsala nokuwisa.

Inyathelo lesi-2: Cofa iqhosha elithi 'Guqula' ukuze uqalise ukuguqula.

Inyathelo lesi-3: Khuphela i-converted yakho M4A iifayile

AAC ukuba M4A Imibuzo Ebuzwa Rhoqo Ngokuguqula

Yintoni eyenza i-AAC ukuya kwi-M4A iguquli sesandi?

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

Ingaba inqanaba lesampuli kunye nobeko lwesiqhagamshelanisi ziya kugcinwa?

Ngokungagqibekanga ewe — i-stereo ihlala i-stereo, i-sample rate emiselweyo (44.1 kHz, 48 kHz, njl.njl.) idluliselwa kwi-M4A output.

Ingaba ukuguqulwa kwe-AAC ukuya kwi-M4A kunokuphinda kuphindeke?

Ungaguqula i-M4A kwakhona kwi-AAC kule ndawo. Ukuba nayiphi na ifomati ebandakanyiweyo ilahlekile, i-round-trip ayizukuba yi-bit-perfect nakuba ibonakalayo okanye icacile.

Yintoni umgangatho wemveliso endingalindele ukuba ndiyilindele ukusuka kwi-AAC ukuya kwi-M4A?

Izicwangciso ezimiselweyo zijolise kwi-broadcast / umgangatho we-web - ngokubonakalayo ifana nomcebo kubabukeli abaninzi. Ukusetyenziswa kovimba, khetha ukhetho oluphezulu lomgangatho kwimimiselo yoguquli.

Ingaba ukutshintsha AAC ukuya ku M4A kuya kubuyisela ikhowudi yesandi?

Ayifuni. AAC ne M4A zithabatha umsindo ukusuka kwi encoder efanayo - into ehlukileyo yi umgqomo ojikelezayo - ngoko iiframes ezikhowudiweyo zikopa ngaphezulu ezingangeni manzi kwaye kuphela isihloko kunye ne tag block zibhalwe kwakhona. Akukho nto ikhowudiweyo, akukho nto iphinde icinezelwe, kwaye oko kuphuma kubi- ifana nomsindo kwi mzuzu endaweni yemini. Oku kubaluleke ngakumbi kunesandi: yonke ikhowudi epheleleyo yeaudiyo elahlekile ibiza umgangatho ongapheliyo, ngoko uguqulelo olunokungazikhuseli umntu kufuneka uhlale. I-M4A yi-MP4 equlethe i-audio kuphela, kwaye yiyo into eyenza i-iTunes, i-Apple Music kunye ne-iPhone Voice Memos app.

Ingaba ukutshintsha AAC ukuya M4A kukwindawo yesibini yokucinezela okulahlekileyo?

Ewe, kwaye kufanelekile ukucwangcisa. Zonke iifomati zilahlekile, ngoko ke i M4A encoder isebenza kwisandi esisele sidlula kwindlela enye ye psychoacoustic, kwaye izigqibo zayo zidibanisa iseti yokuqala. Kwi 192 kbps okanye ngaphezulu impumelelo ihlala icacile kubaninzi bokuziva. Ukuba une master engalahleki naphi na, ukukopela i M4A ukusuka apho endaweni yoko ikhusela i pass kabini ngokupheleleyo. I-AAC ilahlekile kodwa isebenza kakuhle kune-MP3, kwaye iphatha ukuya kuthi ga kwi-48 yeendlela eziqhelekileyo kunokuba ifakwe ibhotile kuyilo lwestereo. I-M4A igcina i-AAC kwiziganeko ezininzi, okanye i-Apple Lossless (ALAC) xa ivela kwi-rip engalahlekiyo.

Yintoni na i-M4A ifayili?

Isiqulathi seefayili esinomsindo ngaphakathi kwayo, kunokuba umsindo ngokwawo. Lo maleko ongaphezulu yindawo apho ubude, isalathisi sokukhangela kunye ne metadata yefomati echazayo igcinwa khona, ngoko umdlali uyazi ukuba i M4A ihlala ixesha elingakanani phambi kokucoda iframe enye endaweni yokukhangela ifayile yonke ukufumanisa. Oku kuthetha ukuba unikezelo alusoloko lugqiba into engaphakathi: iziqulathi zeefayili ezininzi ezinjalo zivunyelwe ukuba zigcine ngaphezulu kwesinye isifo sesandi, oko kukuthi, iifayile ezimbini M4A zingaziphatha ngokuhlukileyo ngelixa zijonge ngaphaya.

Kutheni le nto ifowuni yam okanye i-tablet irekhoda kwi AAC?

Kuba yiyo loo nto i-hardware encoder kwisixhobo ivelisa. Ii-memos zelizwi, ukurekhodwa kwesikrini kunye nokulandela umkhondo wesandi wento erekhodwe kwifowuni ziphuma njenge AAC ngaphandle kokuba umntu ukhetha, oko kukuthi kutheni iifayile ezininzi zifika kuyo kwaye kutheni umgangatho uhlala ungcono kune-ubungakanani befayili ebonisa. Akukho nto malunga nayo imisa ukutshintsha; oku kuthetha kuphela ukuba umthombo wakhowudiwe kabini, yi-chip elungele ukuphila kwebhetri kunokuba kuthembekile. I-AAC yiNkqubo yoKhuseleko lwesandi esiPhambili, emiselwe ngo-1997 njenge-MPEG-2 Inxalenye ye-7 kwaye icwangciswe ngokucacileyo ukubuyisela i-MP3.

Ingaba kukho ilayisensi edityaniswe ne AAC?

Akukho nto ofuna ukuyicinga. I-codec iquka i-patent pools, kwaye ilayisensi ibekwe ngumthumeli we-decoder - ifowuni, umkhangeli zincwadi, inkqubo yokusebenza - ixesha elide phambi kokuba ifayile ifike kuwe. Yiyo loo nto ifomati ikho kuyo yonke indawo kwihardware, kwaye kutheni i royalty- free alternatives yakhiwa naphi na. Ayitshintshanga nto malunga nokutshintsha ifayile oyinayo, kwaye kumbuzo ophilayo kuphela ukuba uthumeli i-encoder ngokwakho.

Ingaba i-M4A ifomati ye-Apple kuphela?

Ivela kwi-Apple kwaye ihlala khona. M4A yiyo into eyenza ukuba inkqubo ye-Music ne-iTunes Store ihlale kuyo, nto leyo eyenza ukuba ibe yinkqubo emiselweyo kwisixhobo ngasinye se-Apple kwaye kutheni uluhlu lufunda njenge-Apple — kodwa uluhlu oluchaziweyo phantsi luvulekile, kwaye yonke ifowuni, umkhangeli zincwadi, iyunithi yemoto yomlawuli kunye nomdlali wemidiya ufunda. Akukho nto yokufakela kwaye akukho nkqubo ye-Apple ebandakanyekayo ekuveliseni enye apha.

Ingaba kukho umda wobungakanani befayili xa uguqula i-AAC ibe yi-M4A?

Ulayisho phezulu olungaziwayo luphelelwe lixesha ngokumiselweyo; i-akhawunti ebhalisiweyo ekhululekileyo ifumana umda ophezulu, kwaye i-akhawunti ye-Pro ayinalo umda wefayili nganye. Inkumbulo yesikhangeli sihlala siyimfuneko yothintelo ixesha elide phambi kokuba umda wethu we-server-side uqale.

Ndingaguqula iifayili ezininzi ze-AAC zibe yi-M4A ngaxeshanye?

Ewe. Nqumle okanye ukhethe iifayile ezininzi ze AAC kwifayili enye yokulayisha - umguquli uqhubekeka nazo ngokuthe tye kwaye ubuyisele i-ZIP yeziphumo ze M4A. Akukho mfuneko yokuphinda uqhubekeke inkqubo yefayili nganye.