M4A Zida

Sinthani M4A kupita ndi kuchokera ku mitundu yosiyanasiyana

Zokhudza M4A

M4A ndi mtundu wamafayilo omvera womwe umagwirizana kwambiri ndi MP4. Imapereka kupsinjika kwapamwamba kwamawu ndi chithandizo cha metadata, ndikupangitsa kuti ikhale yoyenera kugwiritsa ntchito zosiyanasiyana.

Ntchito Zofala

iTunes music
Audiobooks
Podcast episodes

M4A Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu

Kodi ndi M4A audio wapamwamba?

M4A ndi lossy audio mtundu. The encoder amachotsa inaudible ma frequencies ndi masked maganizo kuti afike wapamwamba kukula pafupifupi theka la uncompressed equivalent. Re-encoding M4A kuti wina lossy mtundu amachititsa kuwonongeka kwa katundu; kusintha kuchokera lossless mkulu pamene zingatheke. M4A ndi First-class Apple audio mtundu ndi ndi default kwa ambiri iOS mapulogalamu kuphatikizapo Voice Memos ndi Music app. M4A ali AAC m'malamulo ambiri, kapena Apple Lossless (ALAC) pamene anachokera ku lossless rip.

N’chifukwa chiyani foni yanga imasunga zonse monga M4A?

Popeza foni yam'manja imalemba chilichonse chomwe chimapanga chip yake mu hardware, ndipo M4A ndi chomwe chimapangidwa ndi silicon. App ya kamera siyifunsa - imalemba mtundu womwe chipangizocho chimatha kupanga panthawi yomaliza yomaliza popanda kutentha. Kusintha pambuyo pake ndi koyenera ndipo sichiwononga chilichonse pazomwe zimafunikira ngati musankha chida chomwe chimasunga ndalama zofanana. M4A ndi MP4 chidebe kunyamula audio okha, ndipo ndi zimene iTunes, Apple Music ndi iPhone Voice Memos app kupanga.

Kodi woimba, album ndi kusindikiza kwa M4A yanga kumatha kusinthidwa?

Amachita komwe mtundu wofunikira uli ndi malo omwe angawaike. M4A amayendetsa ma tag ndi mapangidwe ophatikizidwa ngati gawo la fayilo, ndipo kusintha kwa ma copy a pamalo onse omwe amamvetsetsa. Ma targets opanda malire ndi osiyana - adafotokozedwa pambuyo poti kulemba kwa tag ndi koyenera ndipo samangokhala ndi chilichonse, choncho buku losinthidwa limakhala ngati mchenga wa nyimbo zopanda dzina.

Kodi M4A fayilo imatha kunyamula 5.1 surround mix?

Yes — format imagwira bwino ntchito ndi ma channels ambiri kuposa awiri, kotero kuti surround mix imasunga ma channels ake ophatikizidwa moyenera, osati kuikidwa mu stereo panjira. Kodi mumamva ngati surround kumadalira pa mbali ya mbali: wolandirayo adzachotsa ma channels onse, foni idzalowetsa panthawi yosewera popanda vuto lililonse. Kusintha kwa stereo-only format kumachititsa kuti kuikidwa kukhale kosalekeza.

Kodi M4A idzasewera mobwerezabwereza patsamba la webusaiti?

Ndikukhulupirira. M4A ndi imodzi mwamaudindo a audio omwe amagwiritsa ntchito masamba, motero amatha kutulutsidwa m'mawu a audio kapena wosewera podcast ndipo amagwira ntchito zonse popanda plugin kapena fayilo ya fallback. Izi zimapangitsa kuti zikhale zotetezeka zofalitsa, ndipo chifukwa chake kusinthira kujambula kwa exotic ku format iyi nthawi zambiri ndi njira yofupikitsa kuti ikhale yosewera patsamba. M4A amasunga rich iTunes-style metadata, zigawo ndi ntchito zojambulajambula osatha, ndi ndi native audio mtundu pa onse Apple chipangizo.

Kodi ndimafunikira Mac kuti ndichite ntchito ndi M4A mafayilo?

No. The mtundu anatuluka Apple ndi zimene zake zipangizo ndi mapulogalamu kupanga mwa default, koma mavidiyo okha ndi osiyana ndi kuphunzira bwino kumeneko ndi choyenera chida. Kusinthanitsa pano chimachitika pa seva, kotero palibe QuickTime kukhazikitsa, palibe Apple hardware ndi palibe platform-osiyana codec pakiti ndi kukhudzana kulikonse m'njira.

Kodi ndiyenera kusintha bwanji mafayilo anga a M4A?

Kugwirizana ndi malo osankhidwa, si cholinga. Kwa nyimbo, 256 mpaka 320 kbps ndi zosaoneka kwa aliyense womvetsera; kwa mawu ndi podcasts, 96 mpaka 128 kbps ndi zambiri ndipo amadula fayilo yachiwiri. Kulemba mawu kudzera pa ma bitrate ochokera kumawononga malo - amasunga mawu omwe kale apita kudzera pa lossy pass ndipo sabwezeretsa chilichonse chomwe chimatulutsidwa ndi wolemba mawu woyamba.

Ndi M4A lossy kapena lossless?

M4A ndi lossy - encoder amachotsa deta encoder akatswiri kuti akhale inaudible kuti afike m'lifupi wapamwamba kukula. M4A amachititsa zinthu ziwiri kwambiri zosiyana m'mbuyo kwa m'modzi kuwonjezeka - lossy AAC ndi lossless ALAC - ndi non-Apple hardware thandizo ndi zosagwirizana.

Kodi ndiyenera kusintha M4A kuti kugawana?

Kuti musinthe M4A kuti MP3, muyenera kutsatira ndondomeko m'munsimu: 1. Sankhani mtundu wa wapamwamba, kutengerapo FLAC kapena WAV kuti abwezeretse wapamwamba mtundu.

Kodi ndi ndalama zingati kuti kusintha kusintha kukula kwa fayilo?

Kusintha M4A kuti lossless mtundu monga WAV kapena FLAC amasunga kukula kwakukulu; kusintha kwa MP3 kapena AAC pa common bitrates (192-320 kbps) amachepetsa fayilo ndi pafupifupi 5-10x ndi zochepa kuzindikira kusintha kwa katundu.