MP4 → M4A

Sinthani Yanu MP4 ku M4A mafayilo mosavuta

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Kukweza

Momwe mungasinthire MP4 ku M4A

Gawo 1: Kwezani yanu MP4 mafayilo pogwiritsa ntchito batani lomwe lili pamwambapa kapena pokoka ndi kugwetsa.

Gawo 2: Dinani batani la 'Convert' kuti muyambe kusintha.

Gawo 3: Tsitsani pulogalamu yanu yosinthidwa M4A mafayilo

MP4 ku M4A Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu

Kodi ndingagwiritse ntchito bwanji audio kuchokera ku MP4 fayilo ngati M4A?

Ikani fayilo ya MP4 ndipo tidzachotsa mndandanda wa audio, kenako tidzasintha ku M4A. Palibe kanema wopita ndi kuwonongeka kwabwino kuposa zomwe M4A codec imapanga; chida cha / extract-audio / chimayendetsa njira yomweyo.

Kodi fayilo ya M4A imagwiritsa ntchito mtundu uti wa ma bitrate?

Malamulo a M4A ndi 192 kbps (wosawoneka bwino kwa nyimbo). Chotsani mpaka 320 kbps (wokonda mawu), 128 kbps (wotchuka pa podcast), kapena 96 kbps (wolankhula / fayilo yaing'ono). Chosankhachi chimasintha kukula kwa fayilo motsutsana ndi kumvetsera kwa uthenga ndipo chimawonekera m'masankho owonjezera pa kusintha.

Kodi ndidzataya mtundu wa audio kuchokera ku MP4 kupita ku M4A?

Ngati M4A ndi yopanda kuwonongeka (WAV, FLAC), zonse zosakira za mavidiyo ochokera zimasungidwa moyenera. Ngati M4A ndi yowonongeka (MP3, AAC, OGG, Opus), M4A codec imabwezeretsa kuwonongeka - pa 192 kbps yosasinthika iyi ndi yosawoneka bwino kwa zinthu zambiri zochokera.

Kodi M4A yosanduka imasunga kuchuluka kwa sampling?

Mwa default ndi choncho — 48 kHz ya nyimbo yamkati mwa MP4 imakhala 48 kHz yamkati mwa M4A. Ngati mukufuna 44.1 kHz (kugwirizana ndi mtundu wa CD) mndandanda wolowetsedwa wa mtundu wa sampling umayang'aniranso kusampula ndi chinyezi cholimba (sinalibe zinthu zosagwirizana).

Kodi ndingagwiritse ntchito ma audio kuchokera ku MP4 mafayilo ambiri kupita ku M4A m'modzi?

Yesani - chotsani fayilo ya MP4 ndipo tidzatulutsa audio mofanana. Ogwiritsa ntchito Premium amalandira ogwira ntchito ambiri mofanana ndi palibe kukana kwa kukula kwa fayilo; pa fayilo ya 50-file iyi ndi kusiyana pakati pa masekondi 90 ndi maola 8.

Kodi fayilo ya M4A idzaphatikizidwa ndi mutu / woimba / album?

Ngati fayilo ya MP4 ili ndi gawo kapena metadata ya stream (yofala kwambiri pa DVD rips, podcasts, mavidiyo a nyimbo), timakopa masamba a woimba / mutu / album ku M4A kontena. Mafuta opanda tag MP4 amapanga M4A osalemba - kugwiritsa ntchito wolemba tag (Mp3tag, Picard, MusicBrainz) pambuyo pake ngati ma tag olemera amakhudza.

Kodi ndi nthawi yayitali bwanji kuti mutenge M4A kuchokera ku fayilo ya MP4?

Kutulutsa kwa audio ndi kosavuta kuposa kubwezeretsa kanema - nthawi zambiri 5-15% ya nthawi yoyambira. 1-hour MP4 → M4A imatha m'maola 3-9 pa standard pipeline; kanema wa mphindi 5 umatha m'maola ochepa.

Kodi ndingagwiritse ntchito gawo limodzi la MP4 audio ngati M4A?

Sichingakhale mwanjira imeneyi — chotsani audio yonse ngati M4A koyamba, kenako mugwiritse ntchito /audio-trim/ kuti muchepetse gawo. Mtundu wa njira yokhala ndi njira ziwiri ndi wofulumira kuposa ntchito yophatikizika ndipo umakulola kuti muwonetsetse nyimbo yotulutsidwayo pambuyo pochotsa.

Kodi fayilo yanga MP4 ndi yapadera pamene ndikuchotsa audio?

Yes — same privacy model as every conversion on the site: isolated workers, automatic deletion within minutes, no human review of audio or video content. See /privacy/.

N'chifukwa chiyani fayilo yanga M4A ili ndi zigawo zosadziwika?

Ma gaps opanda mawu nthawi zonse amatanthauza kuti fayilo ya MP4 ili ndi ma audio ambiri (mawu owonjezera, mazinenero ena, ma backchannels a surround) ndipo tasankha mpweya woipa. Pezani njira yopezera "mpweya wa audio" kuti musankhe mpweya 0, 1, etc., kapena kuwonjezeranso mpweya wonse ku mpweya wa M4A ngati M4A ikuthandizira.

Kodi M4A yochotsa ikhoza kukhala stereo, mono, kapena 5.1?

Chithunzi cha sitima chimasunga kuchokera ku MP4 mwa default - 5.1 MP4 chimatulutsa 5.1 M4A komwe codec imathandizira (AAC, FLAC, OGG, Opus). Force stereo kapena mono ndi njira yowonjezera-kanali; yosavuta kwa ntchito za podcast kapena kusewera kwa bandwidth yaying'ono.

Kodi M4A yosakira imasewera pa iPhone, Android, kapena stereo yagalimoto?

MP3 imasewera padziko lonse. AAC / M4A imasewera pa Apple ndi pafupifupi onse a Android. OGG / Opus amafuna wosewera waposachedwa pa iOS koma amasewera bwino pa Chrome / Firefox / VLC. Kusintha kwa chipangizo chatsopano kumasankha M4A codec yomwe ingakhale yoyenera kusewera pamalo anu osankhidwa.

MP4

Mtundu wa chidebe cha MP4 ukhoza kusunga makanema, mawu, mawu omasulira, ndi zithunzi mu fayilo imodzi yokhala ndi kukanikiza kwabwino kwambiri.

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.