Opus → M4A

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 kuwonongeka, kulemba koyamba kwa M4A kuchokera ku yomwe imalepheretsa kupitanso koyamba.

Default 192 kbps for lossy M4A; pass-through for lossless M4A. Override to 320 kbps if you want maximum lossy fidelity, 128 kbps for size-restricted podcast distribution, or 96 kbps for voice-only sources where the smaller file matters more than studio detail.

Ngati Opus ndi yowonongeka (MP3, AAC) ndi M4A ndi yopanda kusowa (WAV, FLAC), M4A si yabwino kuposa Opus - simungathe kubwezeretsa zambiri zomwe zatulutsidwa ndi Opus codec yowonongeka. Ngati Opus ndi yopanda kusowa ndi M4A ndi yopanda kusowa, yembekezerani kuti M4A encoder ibwezeretse; pa 192 kbps kuwonongeka kumakhala kosadziwika kwa nkhope zambiri.

Ndikoyenera - dzina, woimba, album, chaka, mndandanda wa nyimbo, album art, BPM, kusewera-kupeza kumawerengedwa kuchokera ku Opus chomera ndi kulemba m'madera ofanana pa M4A chomera. ID3v2 (MP3), Vorbis maganizo (OGG, FLAC), MP4 atoms (AAC, M4A), RIFF INFO (WAV), iXML chidutswa zonse map cleanly. M4A ndi MP4 chidebe kunyamula audio okha, ndipo ndi zimene iTunes, Apple Music ndi iPhone Voice Memos app kupanga.

Yes — chotsani fayilo ya Opus ndipo tidzazipanga mofanana. Premium ili ndi ogwira ntchito ambiri mofanana ndi malire a fayilo, kotero fayilo ya 500 imatha m'maola ochepa kuposa maola asanu. Mtundu wa fayilo umasungidwa mu ZIP yotulutsidwa.

Mwa default ndi yemweyo (48 kHz Opus imatulutsa 48 kHz M4A, 44.1 kHz Opus imatulutsa 44.1 kHz M4A). Kuti mukwaniritse zofunikira — monga kuchepetsa 96 kHz studio masters mpaka 44.1 kHz M4A polemba CD, kapena kuwonjezera 22 kHz voicemail mpaka 44.1 kHz M4A — mndandanda wolowetsa wa sampling-rate umagwiritsa ntchito kuwonjezera kwa SOX-style.

Ndiyo — kusankha kwa loudness-normalize kumagwiritsa ntchito ITU-R BS.1770 / EBU R128 ku M4A output, kulenga -14 LUFS (streaming standard) kapena -16 LUFS (podcast standard) kapena malire apadera. Kuthandiza pamene mukusintha nyimbo ndi zigawo zosiyanasiyana za mastering kukhala imodzi M4A playlist.

MP3 imasewera padziko lonse lapansi pazinthu zonse zomwe zidapangidwa mzaka zapitazi 20. AAC imasewera pa Apple, ambiri a Android, Sonos, ndi ma stereo amakono agalimoto. FLAC imasewera pa Sonos ndi Android yaposachedwa, osati bwino pa iPods oyambirira. WAV imasewera pa chilichonse koma fayilo ndi yayikulu. Kuwonekera kwa chipangizocho chimasankha M4A codec yotetezeka kwa pulogalamu yomwe mumasankha. M4A amasunga rich iTunes-style metadata, zigawo ndi ntchito zojambulajambula osatha, ndi ndi native audio mtundu pa onse Apple chipangizo. M4A amachititsa zinthu ziwiri kwambiri zosiyana m'mbuyo kwa m'modzi kuwonjezeka - lossy AAC ndi lossless ALAC - ndi non-Apple hardware thandizo ndi zosagwirizana.

Ndikofunika — fayilo Opus yotulutsidwa imathetsedwa m'maola ochepa. Tisasewera, sitisunga kapena sitigawana zolemba za audio. Mzerewu umagwira ntchito pa zida zomwe timayang'anira kuyambira pachiyambi mpaka kumayambiriro; palibe ntchito yachitatu yomwe imalandira fayilo yanu.

Kusintha kwa codec (mwachitsanzo, FLAC -> MP3 kapena WAV -> AAC): nthawi zambiri 10-20% ya nthawi yoyambira, choncho 1-hour Opus -> M4A imatha m'maola 6-12 pa chingwe cha standard.

Sizimachitika kusintha kwa kuwonjezeka kwa mavidiyo mwamsanga ngati njira yosintha mavidiyo kukhala oyenera siyikugwira ntchito. Ngati mumaona kusintha kwa mavidiyo, wosewera mavidiyo kapena laibulale ya mavidiyo angagwiritse ntchito ReplayGain kapena kusintha kwa mavidiyo pamodzi pamasewera - chotsani izo ndipo M4A idzawoneka yofanana ndi Opus (yopanda kuwonongeka) kapena yofanana ndi Opus (yokhala ndi kuwonongeka kowonekera).