![]() Or is its simply not shipped with any software ? e. Is it possible to implement Windows Support for Apples Core Audio AAC High Efficiency v2? However freac does not find such a profile on Windows for Core Audio. The MPEG-4 HE-AAC v2 decoder library (with DAB and DRM support) for the SHARC processor implements a combination of Advanced Audio Coding (AAC), Spectral Band Replication (SBR) and Parametric Stereo (PS), standardized as the High-Efficiency v2 profile in MPEG-4 (HE AAC v2). m4a extensions.Ĭonverting audio with Core Audio AAC High Efficiency v2 on osx make m4a recognizable by Itunes. (However some other software like Synology DsAudio won't recognize mp4 then )Īny other Apple Software (Books, QuickTime) plays aac_he_v2. I can only recommend to look into this 2009 EBU Technical Review for a detailed description. It has been extensively tested, and results suggest that it provides excellent quality even at 48 kBit/s (whereas MP3 only scored as 'poor'). mp4, without changing any container format, solves the problem. HE-AAC v2 (the standardized name of what is 'aacPlus v2' as a trade name) supersedes the AAC standard. ![]() It will not recognise aac_he_v2 converted with Fraunhofer libfdk_aac if and only if they have the m4a extension. There is a super weired bug with Apple Music and Window Itunes. Itself allows to convert audio into aac_he_v2. Neither Apple Music nor Itunes on Windows I am wondering whether it really comes from Apple Music. I suppose it is shipped with new Apple Music app. You're right that it's easier to use opus, but a lot of devices can't play that.I accidentally noticed that freac Mac OS version has Core Audio AAC High Efficiency v2 Profile. As always, experiment to see what works for your ears. If you are only going to play it on your computer, or you are sure that your hardware player supports HE-AAC, you can aim for a bit rate of 160kb/s for version 1, or 128kb/s for version 2. Hi, I want to encode some audio files to AAC so that they have the same bitrate and quality as music from iTunes - 256kbps VBR. Unfortunately, many devices that can play AAC-LC (the default profile for libfdk_aac) simply cannot play either version of HE-AAC, so this is not recommended for surround sound audio, which normally needs to be compatible with such hardware players. With fre:ac you easily rip your audio CDs to FLAC or MP3 files for use with your mobile player or convert. If you have mono, or want to down-mix to mono, use HE-AAC version 1. Vorbis, Opus, AAC, WAV, WMA and other formats. Note: HE-AAC version 2 only handles stereo. HE-AAC version 1 is suited for bit rates below 64kb/s (for stereo audio) down to about 48 kb/s, while HE-AAC version 2 is suited for bit rates as low as 32 kb/s (again, for stereo). ![]() This is a pair of AAC profiles tailored for low bit rates (version 1 and version 2). Video:0kB audio:2759kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: 2.183906% This FDK AAC Codec software is intended to be used on a wide variety of Android devices. Size= 2819kB time=00:11:46.05 bitrate= 32.7kbits/s speed=87.4x The Fraunhofer FDK AAC Codec Library for Android ('FDK AAC Codec') is software that implements the MPEG Advanced Audio Coding ('AAC') encoding and decoding scheme for digital audio. ![]() Handler_name : ISO Media file produced by Google Inc. Just don't redistribute it.Īnd then it can be done: □ ffmpeg -i in.m4a -c:a libfdk_aac -profile:a aac_he_v2 -b:a 32k out.m4aįfmpeg version N-106448-gc2d1597a8a-Nico-20220328 Copyright (c) 2000-2022 the FFmpeg developersīuilt with gcc 9 (Ubuntu 9.4.0-1ubuntu1~20.04.1)Ĭonfiguration: -prefix=/home/nico/ffmpeg_build -pkg-config-flags=-static -extra-cflags=-I/home/nico/ffmpeg_build/include -extra-ldflags=-L/home/nico/ffmpeg_build/lib -extra-libs='-lpthread -lm' -bindir=/home/nico/bin -extra-version=Nico-20220328 -enable-gpl -enable-libdav1d -enable-libass -enable-libfdk-aac -enable-libfreetype -enable-libmp3lame -enable-libopus -enable-libvorbis -enable-libvpx -enable-libx264 -enable-libx265 -enable-openssl -enable-demuxer=dash -enable-libxml2 -enable-nonfree But it's perfectly legal to compile ffmpeg yourself with libfdk-aac support, like I do.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |