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Re: How to load AAC/MP4 files and extract raw audio samples?
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Re: How to load AAC/MP4 files and extract raw audio samples?


  • Subject: Re: How to load AAC/MP4 files and extract raw audio samples?
  • From: Jens Alfke <email@hidden>
  • Date: Sun, 24 May 2015 17:39:44 -0700


On May 24, 2015, at 5:11 PM, Roman Thilenius <email@hidden> wrote:

or you use coreaudio´s :)

Exactly. The licensing is a non-issue unless you’re planning to develop your own codec or ship a new device containing a codec.

But apparently the licensing fees for MP3 were high enough that Apple decided against shipping an MP3 _encoder_ API in the OS; their only encoder is inside iTunes and not available to developers, which must have made it cheaper to license.

(And if someone asks “what about Ogg Vorbis”, what I heard back in the day was that it’s considered to be infringing on a number of patents, which is enough to deter anyone with deep pockets from implementing it. That is, it’s assumed that if Apple or, say, Sony shipped an Ogg codec, they'd immediately be hit with large patent lawsuits.)

—Jens
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References: 
 >How to load AAC/MP4 files and extract raw audio samples? (From: Vojtěch Meluzín <email@hidden>)
 >Re: How to load AAC/MP4 files and extract raw audio samples? (From: Jens Alfke <email@hidden>)
 >Re: How to load AAC/MP4 files and extract raw audio samples? (From: Vojtěch Meluzín <email@hidden>)
 >Re: How to load AAC/MP4 files and extract raw audio samples? (From: Paul Davis <email@hidden>)
 >Re: How to load AAC/MP4 files and extract raw audio samples? (From: Hamish Moffatt <email@hidden>)
 >Re: How to load AAC/MP4 files and extract raw audio samples? (From: Roman Thilenius <email@hidden>)

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