AMR → M4A

Sinthani Yanu AMR ku M4A mafayilo mosavuta

Sankhani mafayilo anu

kapena dinani ndi kuchotsani mafayilo anu apa

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Kusintha owona ufulu, Pro ogwiritsa angakonzekere zambiri zochuluka owona; Kulembetsa Tsopano

Kukweza

Momwe mungasinthire AMR ku M4A

Gawo 1: Kwezani yanu AMR 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

AMR ku M4A Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu

Kodi ndingasinthire bwanji AMR audio ku M4A popanda kuwononga mtundu?

Kutsitsa fayilo ya AMR ndipo wosintha amasankha M4A codec ndi bitrate kuti agwirizane ndi chiyambi. Lossless M4A (WAV / FLAC / ALAC) imasunga zonse zomwe zimawoneka bwino; lossy M4A (MP3 / AAC / OGG / Opus) imasinthidwa ku 192 kbps yomwe ndi yosawoneka bwino kwa maganizo ambiri. AMR ndi narrowband mawu codec kuyendetsa pakati pa 4.75 ndi 12.2 kbps, modeling munthu woimba m'mimba kuposa wonse audio spectrum. M4A ali AAC m'malamulo ambiri, kapena Apple Lossless (ALAC) pamene anachokera ku lossless rip.

Kodi kusinthira AMR ku M4A ndi gawo lachiwiri la kutsitsa kwa lossy?

Ndikukhulupirira kuti ndinu oyenera, ndipo ndibwino kuti mupange. Mafomu awiriwa ndi owonongeka, choncho M4A encoder akuchita ntchito kuchokera ku audio yomwe yakhala ikuyenda mwa psychoacoustic pass, ndipo masankho ake oyamba amapanga gawo loyamba. Pa 192 kbps kapena pamwambapa, zotsatirazi ndizosawoneka bwino kwa ambiri owerenga. Ngati muli ndi master yopanda kusowa, kulemba koyamba kwa M4A kuchokera ku yomwe imalepheretsa kupitanso koyamba.

N’chifukwa chiyani nyimbo zimawoneka zoipa kwambiri pa chikhulupiriro?

Chifukwa chimodzi mwazigawo zake ndi codec ya mawu kuposa codec ya nyimbo. Imakhala ndi maonekedwe a munthu woimba ndipo imachotsa chilichonse m’mbali mwa bandwidth ya foni, chomwe ndi choyenera kwa mawu olemba mawu komanso chowononga kwa chilichonse chomwe chili ndi zida. Kusintha kuchokera ku izo sikungabwezeretse ma frequencies osakhudzidwa — iwo sanali kusinthidwa pamalo oyamba. AMR amawononga nyimbo: yake 8 kHz bandwidth amachotsa zonse pamwamba foni ma frequencies, ndi palibe ndalama ya re-encoding amabweretsa izo kumbuyo.

Kodi bitrate yomwe imachokera ku fayilo ya M4A idzagwiritsa ntchito?

Mtengo woyambirira ndi 192 kbps kwa lossy M4A; pass-through kwa lossless M4A. Chotsani 320 kbps kwa audiophile kapena 96 kbps kwa mawu / podcast. Chosankha chimasintha kukula kwa fayilo ndi kumvetsera; pansi pa 96 kbps lossy artifacts amawoneka pa nyimbo.

Kodi kuchoka ku AMR kupita ku M4A kumachepetsa mtundu wanga wa audio?

Ngati AMR ndi yowonongeka ndipo M4A ndi yopanda kusowa (mwachitsanzo MP3 → WAV), M4A si yabwino kuposa AMR - simungathe kubwezeretsa zambiri zomwe zatulutsidwa. Ngati AMR ndi yopanda kusowa ndipo M4A ndi yopanda kusowa, M4A codec imabwezeretsa; pa 192 kbps zotsatirazi ndizosawoneka bwino kwa zinthu zambiri.

Kodi wosintha AMR kupita ku M4A amasunga ID3 / metadata tags?

Ndikoyenera - dzina, woimba, album, chaka, mndandanda wa nyimbo, ndi album art amawerengedwa kuchokera ku AMR kontena ndi kulemba ku M4A kontena komwe mtundu umathandizira ma tag. Zonse zofunikira (MP3, AAC, FLAC, OGG) zimayendetsa ma tag bwino; WAV yosapanga dzimbiri siyichita. M4A ndi MP4 chidebe kunyamula audio okha, ndipo ndi zimene iTunes, Apple Music ndi iPhone Voice Memos app kupanga.

Kodi ndingasinthire mamiliyoni a AMR mafayilo ku M4A?

Yai - chotsani fayilo ya AMR ndikuwapanga mofanana. Premium ili ndi ogwira ntchito ambiri mofanana ndi malire a fayilo, kotero fayilo ya 500-file batch imatha m'maola angapo osati m'maola angapo.

Kodi M4A idzakhala ndi kuchuluka kwa sampling monga AMR?

Mwa default yes — 48 kHz AMR imakhala 48 kHz mu M4A. Ngati mukufuna kulowetsa kuti mugwirizane (96 kHz → 44.1 kHz kwa kulemba CD), kusankha kwa sampling-rate kumagwiritsa ntchito kulowetsanso kwabwino kwambiri panjira yofanana yolemba.

Kodi ndingasinthire kuwala kwamphamvu pamene ndikusintha AMR kupita ku M4A?

Ndiye — njira yosintha mawu imagwiritsa ntchito ITU-R BS.1770 / EBU R128 yosintha mawu ku M4A, yolenga -14 LUFS (mtengo wosinthira) kapena -16 LUFS (mtengo wosinthira podcast).

Kodi M4A yanga idzasewera pa stereo yagalimoto, iPod ndi Sonos?

MP3 imasewera kulikonse. AAC imasewera pa Apple, ambiri a Android, ndi Sonos. FLAC imasewera pa Sonos ndi Android koma si pa iPods oyambirira. WAV imasewera pa chilichonse koma ndi chachikulu. Kusintha kwa chipangizo chosinthika chimasankha codec ya M4A yosinthidwa kwa zida zanu zofunikira. M4A amasunga rich iTunes-style metadata, zigawo ndi ntchito zojambulajambula osatha, ndi ndi asilikali audio mtundu pa zonse Apple chipangizo. M4A amachititsa zinthu ziwiri kwambiri zosiyana m'mbuyo mwa m'modzi kuwonjezeka - lossy AAC ndi lossless ALAC - ndi non-Apple hardware thandizo ndi zosagwirizana.

Kodi fayilo yanga AMR ndi yapadera pamene ikusintha kukhala M4A?

Yes - zotsitsa zotsitsa AMR zimatha kuchitidwa m'mabungwe osiyana ndi omwe amagwira ntchito ndipo zimatha kuthetsedwa m'maola ochepa. Sitingagwiritse ntchito, kusungira nthawi yayitali kapena kugawana zolemba za audio.

Kodi nthawi yayitali bwanji yosinthira nthawi ya 1-AMR mpaka M4A?

Kusinthanso kwa codec yofanana: 10 mpaka 30 masekondi. Kusinthanso kwa codec yosiyana: 10 mpaka 20% ya nthawi yochokera, kotero nthawi ya 1-hour AMR → M4A imatha m'maola 6 mpaka 12. Ntchito za batch zimagwirizana pakati pa ogwira ntchito kuti ziwonjezere kufulumira.