Mataki na 1: Loda naka MP4 fayiloli ta amfani da maɓallin da ke sama ko ta hanyar ja da sauke su.
Mataki na 2: Danna maɓallin 'Maida' don fara hira.
Mataki na 3: Sauke fayil ɗin da aka canza M4R fayiloli
MP4 zuwa M4R Tambayoyin da ake yawan yi game da Canzawa
Ta yaya zan fitar da waƙa kawai daga MP4 zuwa M4R?
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Ka shigar da fayil MP4 kuma mai maida zai demuxe saurin sauti daga cikin kwandon MP4, sa'an nan ya canza shi zuwa M4R. An manta da firam ɗin bidiyo — babu wata biyu ta wucewa da bidiyo, babu asarar ingancin da ke wuce abin da codec ɗin M4R ya gabatar da kansa. MP4 ne ISO/IEC 14496-14, standardized a cikin 2001 da kuma dauke daga irin QuickTime akwatin zane MOV amfani. M4R shi ne iPhone ringtone - wani fayil na AAC na yau da kullum a cikin wani MP4 akwatin da ya canza da fayil na iTunes a matsayin wani ringtone.
Me ya faru da sauti mai yawa-kanana idan an canja MP4 zuwa M4R?
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An ɗaga shi zuwa stereo, saboda M4R ba shi da wani nau'in dandamali mai yawa. An yi amfani da ƙananan haɗawa don amfani da ƙananan haɗawa don haka zauren magana na tsakiyar dandamali yana da kyau kuma an haɗa wuraren da ke kusa a matakin da aka rage. Duk abin da ya dogara kan wurin dandamali na daban ya tafi idan wannan ya faru. M4R ne Apple-daya da tsawon-ƙasa; wani abu fiye da 40 seconds ne a cikin kwanciyar hankali da aka ki da wayar.
Wanne waƙa ta sauti ake fitarwa idan MP4 na na da yawa?
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Da ƙa'idoji, maɗaukakiyar maɗaukakiyar 0 (ɗaukakiyar waƙoƙin sauti na farko, a mafi yawan lokuta maɗaukakiyar maɗaukakiyar). Idan MP4 ɗinka na da sharhi, dubs, ko maɗaukakiyar sauti mai bayani a kan waƙoƙin sauti na ƙarshe, mai zaɓar "ɗaukakiyar waƙoƙin sauti" na ci gaba yana ba ka damar zaɓar 1, 2, 3... da bayyananne. An nuna jerin waƙoƙin a cikin nunawa kafin upload don haka ba za ka iya zaɓar da ba a gani ba.
Mene ne bitrate ɗin da fayil M4R ke amfani da shi?
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Dimba M4R na bitrate shine 192 kbps (mai haske ga kiɗa ga mafi yawan kunnuwa). Ka sake zuwa 320 kbps ga fitarwa mai sauti, ko 96-128 kbps ga magana / podcast inda fayil ɗin da ke da ƙarancin girma shine mafi muhimmanci. M4R masu dauke da asara (WAV, FLAC) suna manta da daidaitattun bitrate kuma suna riƙe da kowane misali. The payload ne AAC, conventionally da aka rufe a 40 seconds, wanda shi ne mafi tsawo sauti iOS za su yarda.
Shin tafiya daga MP4 zuwa M4R za ta rage ingancin sautina?
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Idan M4R format ɗin ba ta da asara (WAV, FLAC, ALAC), za'a kiyaye kowace misali ta asali. Idan M4R format ɗin yana da asara (MP3, AAC, OGG, Opus), codec ɗin zai sake ƙuƙunta — a 192 kbps bambancin ba zai ji ba ga mafi yawan abun ciki; a 96 kbps za ka iya jin cimbals ko sibilants suna da sauƙi. Kontainer ɗin MP4 ba shi da wata tasiri a kan wannan — kawai daidaitattun codec ɗin ne suke da muhimmanci.
Shin an fitar da M4R yana riƙe da ƙimar misali MP4?
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By default yes — 48 kHz MP4 audio becomes 48 kHz M4R audio, 44.1 kHz becomes 44.1 kHz. If you need to downsample for compatibility (e.g. 96 kHz studio masters to 44.1 kHz CD-quality M4R) the sample-rate dropdown does this with high-quality resampling.
Shin zan iya fitar da sauti M4R daga wata takardar shaidar da ke da fayiloli MP4?
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Na'am — ka saka wata ƙuƙwalwar MP4 fayiloli cikin yankin shigarwa kuma mu yi fitarwa a cikin daidaito. Premium na samun ma'aikata masu daidaito da yawa; akan ƙuƙwalwar 100-fayil (ta hanyar tattara fina-finai da bidiyo) wannan shine bambancin tsakanin sakan 90 da minti 8.
Menene lokacin da ake buƙata don fitar da M4R daga cikin MP4 na awa 1?
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Audio demux + transcode yana tafiya da sauri fiye da sake- encoding na bidiyo - a kan 5-15% na lokacin asali. 1-hour MP4 -> M4R ya ƙare cikin minti 3-9 a kan hanyar ruwa ta ƙa'ida. Idan M4R codec ya haɗu da codec na asali a cikin MP4 (wanda ake amfani da shi ga AAC cikin MKV / MP4), shi ne wani remux na gaskiya kuma yana tafiya cikin sakan.
Idan fayil MP4 ya adana metadata na ruwa (mawaki, suna, alƙawari), za mu kwafe waɗannan fannoni cikin ƙofar M4R inda siffar ke goyon bayan alamomin. ID3v2 (MP3), Vorbis comments (OGG, FLAC), MP4 atoms (AAC / M4A), RIFF INFO (WAV) an rubuta su duka. MP4 da ba'a yi masa alama zai samar da M4R da ba'a yi masa alama ba — yi amfani da Mp3tag ko Picard bayan- fitarwa don ya zama mai albarka.
Shin MP4 na na sirri ne yayin fitar da sauti?
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Na'am — irin wannan siffar sirri kamar duk canji. An yi aiki da tushen MP4 da fitarwa M4R a cikin ma'aikata masu tsallakewa kuma an share su cikin minti. Ba za mu taba wasa, adana, ko raba abun ciki ba. Ka duba /privacy/.
Me yasa M4R na ke da kurakurai ko kuma sauti mara kyau?
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A ko'ina akwai rashin daidaituwa tsakanin maɓallin maɓallin maɗaukaki na maɗaukakiya — MP4 ɗinka ya kasance da tsari na sauti mai maɓallan da yawa kuma mun fitar da maɓallin maɓallin da ba daidai ba (misal, maɓallin maɓallin sauti mai bayani mai ɓoye a matsayin maɓallin maɓallin maɗaukakiya). Yi sake-rarraba tare da zaɓin "maɓallin maɓallin sauti" na ci gaba da daidaita zuwa maɓallin maɓallin dama, ko kuma zaɓi "duk maɓallin maɓalli" don fitar da kowace maɓalli a matsayin fayil na M4R daban.
Shin an iya fitar da M4R cikin stereo, mono, ko kuma 5.1?
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Tsarin layin ya bi MP4 bisa diff: 5.1 MP4 layin sauti yana samar da 5.1 M4R inda codec ɗin ke goyon baya (AAC, FLAC, OGG, Opus). Zaɓin layin-saukar-da-haɗawa yana tilasta stereo ko mono — mai amfani ga gudun aiki na podcast ko daidaituwa da masu magana na Bluetooth mono kawai.
