Kodi nyimbo ya audio imatulutsidwa pamene MP4 yanga ili ndi zambiri?
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Poyambira, mpweya 0 (woyamba wa nyimbo, nthawi zambiri ndi woyamba kuphatikizidwa). Ngati MP4 wanu ali ndi mawu ofotokoza, ma dubbing, kapena mawu ofotokoza pa nyimbo zina, wosankha "mpweya wa nyimbo" akukulola kusankha 1, 2, 3... mwatsatanetsatane. Lipoti la nyimbo limawonekera pa mndandanda woyang'anira kuti musasankhe mwamsanga.
Kodi bitrate imagwiritsa ntchito fayilo ya AIFF?
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Default AIFF bitrate ndi 192 kbps (wowoneka bwino kwa nyimbo kwa amayi ambiri). Kusintha kwa 320 kbps kwa audiophile output, kapena 96-128 kbps kwa mawu / podcast komwe fayilo yaying'ono ndi yoyamba. Ma AIFF opanda malire (WAV, FLAC) sasamala za kukhazikitsa kwa bitrate ndikusunga zonse.
Kodi kuchoka ku MP4 kupita ku AIFF kumachepetsa mtundu wanga wa audio?
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Ngati AIFF ndi mtundu wopanda kuwonongeka (WAV, FLAC, ALAC), zonse zomwe zimapangidwa zimasungidwa. Ngati AIFF ndi zowonongeka (MP3, AAC, OGG, Opus), codec imabwezeretsa - pa 192 kbps kusiyana kumakhala kopanda kudziwika kwa zinthu zambiri; pa 96 kbps mutha kunena kuti ma cymbals kapena ma sibilants amawoneka. MP4 yokhala ndi MP4 siyikhudza izi - zosankha za codec ndizofunikira.
Kodi AIFF yosakira imasunga MP4 kuchuluka kwa satifiketi?
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Mwa default yes — 48 kHz MP4 audio imakhala 48 kHz AIFF audio, 44.1 kHz imakhala 44.1 kHz. Ngati mukufuna kuchepetsa kusamvana kwa kugwirizana (mwachitsanzo, 96 kHz studio masters ku 44.1 kHz CD-quality AIFF) mndandanda wolowetsa wa sampling-rate amachita izi ndi kusamvana kwabwino.
Kodi ndingagwiritse ntchito AIFF audio kuchokera ku fayilo ya MP4?
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Yai - chotsani fayilo ya MP4 ku gawo lotsitsa ndipo tidzachita kutulutsa mofanana. Premium imalandira ogwira ntchito ambiri mofanana; pa fayilo ya 100 (kusonkhanitsa kwa nyimbo za nyimbo) iyi ndi kusiyana pakati pa masekondi a 90 ndi maola a 8.
Kodi ndi nthawi yayitali bwanji kuti mutenge AIFF kuchokera ku 1-hour MP4?
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Audio demux + transcode imayenda mwachangu kuposa kubwezeretsa kanema - nthawi zambiri 5-15% ya nthawi yoyambira. 1-hour MP4 -> AIFF imatha m'maola 3-9 pa standard pipeline. Ngati AIFF codec imagwirizana ndi codec yoyambira yomwe ili mu MP4 (yofala kwa AAC m'ma MKV / MP4), ndi remux yoyera ndipo imagwira ntchito m'masekondi.
Kodi fayilo ya AIFF idzakhala ndi dzina / woimba / ma tag a album?
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Ngati fayilo ya MP4 imasunga metadata ya stream (mlengi, mutu, album), timakopera masambawa ku AIFF komwe mtundu umathandizira ma tag. ID3v2 (MP3), Vorbis comments (OGG, FLAC), MP4 atoms (AAC / M4A), RIFF INFO (WAV) onse amalemba. Opanda ma tag MP4 amapanga AIFF osadziwika - kugwiritsa ntchito Mp3tag kapena Picard kutumiza kunja kuti muwonjezere.
Kodi MP4 yanga ndi yapadera panthawi yochotsa audio?
Nchifukwa chiyani AIFF yanga ili ndi zitseko zosadziwika kapena zosayenera?
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Pa nthawi zambiri, index ya stream siyigwirizana - MP4 yanu ili ndi maudindo ambiri a audio ndipo tatulutsa ulalo wosayenera (mwachitsanzo, ulalo wofotokozera mawu osalankhula m'malo mwa ulalo wophatikizidwa). Yambitsaninso ndi "audio stream" yosinthidwa yosinthidwa ndi index yoyenera, kapena kusankha "all streams" kuti mutenge ulalo uliwonse ngati fayilo yosiyana ya AIFF.
Chilankhulo cha Channel chimatsatira MP4 mwa default: 5.1 MP4 audio stream imapanga 5.1 AIFF komwe codec imathandizira (AAC, FLAC, OGG, Opus). Chosankha cha channel-downmix chimafuna stereo kapena mono - chothandiza kwa ntchito ya podcast kapena kugwirizana ndi ma speakers a Bluetooth a mono.
MP3 imasewera padziko lonse lapansi. AAC / M4A imasewera pa Apple ndi ambiri a Android, kuphatikizapo ma stereo a fakitale a 2014 + +. OGG / Opus amafunikira wosewera waposachedwa ndipo angasamalire pamalo oyambirira a infotainment. Kutsitsa kwa chipangizo chofunikira chimasankha kotetezeka kwambiri AIFF codec kwa chida chomwe mwasankha.
