Re: AAC-HD, Flash AAC

Inore that, just saw Erics email.

John Stirling wrote:
> Hi Greg,
>
> re flv
> What is the build target and output plugin name ?
>
> Our current helix base version is -
> HELIX_DATESTAMP="-D 20070820"
> build -m hxclient_1_5_0_cayenne_restricted -P 
> helix-client-audio-all-fixpt -h -trelease -tsymbols $HELIX_DATESTAMP 
> splay
>
> If we got the flv plugin from Atlas and plugged it into our cayenne 
> build, what are the chances of that working ? ie is it just a new 
> plugin or were there changes to the core needed in order to support FLV ?
>
>
> re AAC-HD
> Yes, I saw that the content should be able to be played back (at 
> reduced quality) via existing AAC decoder. Haven't tried that yet.
>
> The customer is interested in the -HD part (24 bit 96khz playback). 
> I'm presuming this is not on your roadmap ?
>
> John
>
>
> Gregory Wright wrote:
>>
>> 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:[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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>>>>
>>>> [email protected]
>>>> http://lists.helixcommunity.org/mailman/listinfo/helix-client-dev
>>>>
>>>>
>>>>
>>>
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>>
>
>