Changes between Version 29 and Version 30 of Encode/AAC


Ignore:
Timestamp:
Mar 16, 2014, 5:23:12 AM (6 years ago)
Author:
seandarcy
Comment:

https://trac.ffmpeg.org/ticket/3361

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  • Encode/AAC

    v29 v30  
    7979This is a pair of AAC profiles tailored for low bit rates (version 1 and version 2). VBR mode is not compatible with [[#fdk_he|AAC-HE]] so a bitrate is declared. AAC-HE version 1 is suited for bit rates below 64kb/s (for stereo audio) down to about 48 kb/s, while AAC-HE version 2 is suited for bit rates as low as 32 kb/s (again, for stereo).
    8080
     81NOTE: AAC-HE version 2 is only handles stereo. If you have mono, or want to down-mix to mono, use AAC-HE version 1.
     82
    8183Unfortunately, many devices that can play AAC-LC (the default profile for `libfdk_aac`) simply cannot play either version of AAC-HE, so this is not recommended for surround sound audio, which normally needs to be compatible with such hardware players. If you are only going to play it on your computer, or you are sure that your hardware player supports AAC-HE, you can aim for a bit rate of 160kb/s for version 1, or 128kb/s for version 2. As always, experiment to see what works for your ears.
    8284