MP4 → AMR

Maida Naka MP4 zuwa AMR fayiloli da wahala

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Canza fayiloli har zuwa 1 GB kyauta, masu amfani da Pro za su iya canza fayiloli har zuwa 100 GB; Yi rijista yanzu

Ana lodawa

Yadda ake canzawa MP4 zuwa AMR

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 AMR fayiloli

MP4 zuwa AMR Tambayoyin da ake yawan yi game da Canzawa

Ta yaya zan fitar da waƙa kawai daga MP4 zuwa AMR?

Ka shigar da fayil MP4 kuma mai maida zai demuxe saurin sauti daga cikin kwandon MP4, sa'an nan ya canza shi zuwa AMR. An manta da firam ɗin bidiyo — babu wata biyu ta wucewa da bidiyo, babu asarar ingancin da ke wuce abin da codec ɗin AMR ya gabatar da kansa. MP4 ne ISO/IEC 14496-14, standardized a cikin 2001 da kuma dauke daga irin QuickTime akwatin zane MOV amfani. AMR shi ne Adaptive Multi-Rate, magana codec 3GPP standardized ga GSM kira da wayar hannu sauti recorders.

Me ya faru da sauti mai yawa-kanana idan an canja MP4 zuwa AMR?

An ɗaga shi zuwa stereo, saboda AMR 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. AMR na halaka kiɗa: bandwidth ɗinsa na 8 kHz yana cire duk abin da ke sama da frequencies na waya, kuma babu adadin sake-encoding yana dawo da shi.

Me ya sa kiɗa take da zafi a cikin wannan canji?

@ info: shell MP4 na goyon bayan wani nau'in rubutu na ƙarshe kawai (mov_text), kuma sauti mai layuka da yawa ba a yarda da shi ba a waje da masu wasa na kwamfyuta.

Wanne waƙa ta sauti ake fitarwa idan MP4 na na da yawa?

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 AMR ke amfani da shi?

Dimba AMR 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. AMR masu dauke da asara (WAV, FLAC) suna manta da daidaitattun bitrate kuma suna riƙe da kowane misali. AMR shi ne narrowband magana codec aiki tsakanin 4.75 da 12.2 kbps, modeling da mutum vocal tract a matsayin mai cikakken audio spectrum.

Shin tafiya daga MP4 zuwa AMR za ta rage ingancin sautina?

Idan AMR format ɗin ba ta da asara (WAV, FLAC, ALAC), za'a kiyaye kowace misali ta asali. Idan AMR 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 AMR yana riƙe da ƙimar misali MP4?

By default yes — 48 kHz MP4 audio becomes 48 kHz AMR 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 AMR) the sample-rate dropdown does this with high-quality resampling.

Shin zan iya fitar da sauti AMR daga wata takardar shaidar da ke da fayiloli MP4?

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 AMR daga cikin MP4 na awa 1?

Audio demux + transcode yana tafiya da sauri fiye da sake- encoding na bidiyo - a kan 5-15% na lokacin asali. 1-hour MP4 -> AMR ya ƙare cikin minti 3-9 a kan hanyar ruwa ta ƙa'ida. Idan AMR 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.

Shin fayil AMR zai ɗauki suna / mai waƙa / alamar alƙawari?

Idan fayil MP4 ya adana metadata na ruwa (mawaki, suna, alƙawari), za mu kwafe waɗannan fannoni cikin ƙofar AMR 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 AMR 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?

Na'am — irin wannan siffar sirri kamar duk canji. An yi aiki da tushen MP4 da fitarwa AMR 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 AMR na ke da kurakurai ko kuma sauti mara kyau?

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 AMR daban.

MP4

Tsarin kwantena na MP4 zai iya ɗaukar bidiyo, sauti, ƙan bayanai, da hotuna a cikin fayil guda tare da matsi mai kyau.

AMR

AMR (Adaptive Multi-Rate) wani tsari ne na matsawa mai jiwuwa wanda aka inganta don lambar magana. An fi amfani da shi a cikin wayoyin hannu don rikodin murya da sake kunna sauti.