RE: AAC-HD, Flash AAC

Yes, on HEAD, 310Atlas, and 204Cayenne, we support:

Audio Within FLV: Uncompressed, ADPCM, MP3, Linear PCM, AAC, MP3 8kHz


Eric

=======================================
Eric Hyche ([email protected])
Principal Engineer
RealNetworks, Inc.


>-----Original Message-----
>From: Gregory Wright [mailto:[email protected]]
>Sent: Thursday, July 16, 2009 10:20 AM
>To: John Stirling
>Cc: [email protected]; 'Helix client dev'
>Subject: Re: [Helix-client-dev] AAC-HD, Flash AAC
>
>
>On Jul 16, 2009, at 6:56 AM, John Stirling wrote:
>
>> Hi Eric,
>>
>> Sorry, getting pushed by our marketing people for an answer on this..
>>
>> Just need confirmation of -
>> (re flv)
>> What branch is that supported on ?
>> Also, I presume once we have the appropriate .flv plugin then other
>> datatypes via .flv (eg mp3) will also be supported ?
>
>It is on HEAD and 310Atlas for sure. I also believe it was used on
>some Cayenne
>branches, but I was not part of that work so I am not sure.
>
>Did you need an answer on a particular branch?
>
>I would guess MP3 is supported, but someone more involved in FLV
>playback
>would have to say for sure.
>
>
>>
>> (re AAC-HD)
>> Are there any plans to support it ?
>
>"The HD-AAC encoding process embeds a core layer that can be played on
>existing music players and mobile phones that support the standard AAC
>format, such as Apple's iPod and the iPhone. The fully lossless signal
>will be available for playback in future devices that feature an HD-
>AAC decoder, according to the company. HD-AAC files can also be
>streamed to multiple devices at varying bitrates to help maximize the
>sound quality under varying network conditions."
>
>
>It sounds like AAC-HD will playback fine via current AAC decoders. So
>they say
>anyway. If the file formats/mime-types are the same and the bitestream
>really
>is compatible with normal AAC, the it "should just work(tm)".
>
>--greg.
>
>
>
>>
>> Thanks
>> John
>>
>>
>> John Stirling wrote:
>>> Eric Hyche wrote:
>>>> John,
>>>>
>>>> I'm not familiar with the term "AAC-HD". Is there a specification/
>>>> definition for it somewhere?
>>>>
>>>>
>>> Some links below
>>>
>>> http://www.iis.fraunhofer.de/EN/pr/Presse/Press_Releases_2008/HD-AAC_by_Fraunhofer_IIS.jsp
>>>
>>> http://www.macworld.com/article/131447/2008/01/hdaac.html
>>>
>>>> As far as Flash AAC, I assume you mean AAC within a .flv or .f4v
>>>> file. If so, then yes, this is supported.
>>>>
>>>>
>>> Yes, .flv.
>>>
>>> What branch is that supported on ?
>>>
>>> Also, I presume once we have the appropriate .flv plugin then other
>>> datatypes via .flv (eg mp3) will also be supported ?
>>>> Eric
>>>>
>>>> =======================================
>>>> Eric Hyche (
>>>> [email protected]
>>>> )
>>>> Principal Engineer
>>>> RealNetworks, Inc.
>>>>
>>>>
>>>>
>>>>
>>>>> -----Original Message-----
>>>>> From:
>>>>> [email protected] [mailto:helix-client-
>>>>> [email protected]
>>>>> ]
>>>>> On Behalf Of John Stirling
>>>>> Sent: Monday, July 13, 2009 3:37 AM
>>>>> To: Helix client dev
>>>>> Subject: [Helix-client-dev] AAC-HD, Flash AAC
>>>>>
>>>>> Are either of these formats currently supported by helix ?
>>>>>
>>>>> If so -
>>>>> . what branch are they available on.
>>>>> . what are the approx MIPs requirements for AAC-HD
>>>>>
>>>>> If not -
>>>>> . are there any plans to add support and what are the timescales.
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>
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>>>
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>>>
>>>
>>>
>>
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