Sinthani MP4 ku AMR

Sinthani Yanu MP4 ku AMR zolemba molimbika

Sankhani mafayilo anu

*Mafayilo achotsedwa patatha maola 24

Sinthani mafayilo okwana 1 GB kwaulere, ogwiritsa ntchito Pro amatha kusintha mafayilo okwana 100 GB; Lowani tsopano

Kukweza

Momwe mungasinthire MP4 ku AMR

Gawo 1: Kutumiza wanu MP4 kutengerapo ndi kuchotsa mafayilo pogwiritsa ntchito batani pamwambapa kapena ndi Shift ndi dziko.

Gawo 2: Dinani 'Transform' batani kuti ayambe kusintha.

Gawo 3: Yamba wanu anasintha AMR mafayilo

MP4 ku AMR Mafunso Ofunsidwa Kawirikawiri Okhudza Kusintha kwa Anthu

Kodi ndingagwiritse ntchito bwanji audio kuchokera ku MP4 fayilo ngati AMR?

Kutsitsa fayilo ya MP4 ndipo tidzachotsa mavidiyo onse, kenako tidzasintha mtundu wa AMR. Palibe kanema wachiwiri wopita ndi kuwonongeka kwa mtundu wa AMR codec.

Kodi AMR fayilo imagwiritsa ntchito mtundu uti wa ma bitrate a audio?

Mtengo woyambirira wa AMR ndi 192 kbps (wowoneka bwino kwa nyimbo). Mukhoza kuchotsa 320 kbps (wokonda mawu) kapena 96-128 kbps (wolankhula / podcast / fayilo yaing'ono). Usankho umakhala wowonekera m'masankho owonjezera.

Kodi ndidzataya mtundu wa audio ngati ndisintha kuchokera ku MP4 kupita ku AMR?

Ngati mtundu wa AMR ndi wa lossless (WAV, FLAC), mumangosunga zonse zomwe zilipo. Ngati mtundu wa AMR ndi wa lossy (MP3, AAC, OGG), codec ya AMR imazichepetsanso — ubwino umadalira bitrate ndi ma audio ochokera. Timagwiritsa ntchito 192 kbps monga default, zomwe ndi zosawoneka bwino kwa zinthu zonse.

Kodi AMR yotulutsidwa imasunga kuchuluka kwa sampling?

Mwa default yes — 48 kHz audio track mu MP4 imakhala 48 kHz mu AMR. Ngati mukufuna 44.1 kHz (CD-quality) kuti mugwirizane ndi osewera oyambirira, zosankha zowonjezera zimaphatikizapo mndandanda wolowetsedwa wa sampling-rate.

Kodi ndingagwiritse ntchito audio kuchokera ku MP4 mafayilo ambiri kupita ku AMR munthawi imodzi?

Yes — drop a folder of MP4 files in and we extract audio in parallel. Premium users get more parallel workers; on a 50-file batch this is the difference between 90 seconds and 8 minutes.

Kodi fayilo ya AMR idzaphatikizidwa ndi mutu / woimba / album?

Ngati MP4 fayilo ili ndi nkhani kapena mndandanda wa metadata, timakopera masamba a woimba / mutu / album ku AMR kontena. Ngati sichoncho, AMR fayilo siyimaphatikizidwa — kugwiritsa ntchito wolemba ma tag (Mp3tag, Picard) pambuyo pa kutumiza kunja ngati mukufuna ma tag ochuluka.

Kodi kumatenga nthawi yayitali bwanji kuchotsa AMR kuchokera ku MP4 fayilo?

Kutulutsa kwa audio ndi kosavuta kuposa kubwezeretsa kanema - nthawi zambiri 5-15% ya nthawi yoyambira. MP4 → AMR ya 1-hour imatha m'maola 3-9 pa standard pipeline.

Kodi ndingagwiritse ntchito gawo limodzi la MP4 audio ngati AMR?

Sichigwira ntchito ndi chida ichi — chotsani audio yonse monga AMR pano, kenako mugwiritse ntchito /audio-trim/ kapena /audio-cutter/ kuti muchepetse gawo. Njira ya mawindo awiri nthawi zambiri imayenda mofulumira kuposa ntchito yophatikizidwa.

Kodi fayilo yanga ya MP4 ndi yachidziwitso pamene ndikuchotsa mawu?

Inde — mtundu wofanana wa kuteteza deta monga pazosintha zonse: ogwira ntchito osiyana, kuchotsa kwachidziwitso m'maola ochepa, palibe kuyankha kwa munthu pazomwe zili.

N'chifukwa chiyani fayilo yanga ya AMR ili ndi zigawo zosadziwika?

Ma gaps osalankhula amatanthauza kuti MP4 imagwiritsa ntchito ma track ambiri a audio ndipo tikusankha ma stream oipa. Pezani "audio stream" kuwonjezera pa kusankha ma stream 0, 1, etc., kapena kuwonjezeranso ma stream onse ku AMR okhala ndi ma track ambiri ngati AMR amathandiza izi.

Kodi AMR yosamutsa imatha kukhala stereo / mono / 5.1?

Chithunzi cha sitima chimasungana kuchokera ku MP4 mwa default — 5.1 MP4 chimatulutsa 5.1 AMR pamene codec imathandizira (AAC, FLAC, OGG). Mukhoza kuletsa stereo kapena mono pogwiritsa ntchito njira ya channel-downmix, yothandiza pa ntchito ya podcast.

Kodi AMR yosakira imasewera pa iPhone / Android / stereo yagalimoto?

MP3 imasewera kulikonse. AAC / M4A imasewera pa Apple ndi ambiri a Android. OGG / Opus amafuna wosewera waposachedwapa pa iOS. Zosankha zophunzitsira zimasonyeza "device" yoyamba yomwe imasankha AMR codec yomwe ingakhale yoyenera kusewera pa chipangizo chanu.