[FFmpeg-devel] who should set framesize?

Alex Converse alex.converse
Thu Jun 25 19:17:52 CEST 2009


On Thu, Jun 25, 2009 at 11:15 AM, Luca Abeni<lucabe72 at email.it> wrote:
> Ronald S. Bultje wrote:
>>
>> Hi,
>>
>> On Thu, Jun 25, 2009 at 10:11 AM, Alex Converse
>> <alex.converse at gmail.com>wrote:
>>
>>> I'm a bit confused here. ffaac does not support SBR decoding at all.
>>> faac does not support SBR encoding at all.
>>
>>
>> Does faad do SBR decoding? Because faad "fails" as well in the same way as
>> ffaac.
>
> Well, I do not know this stuff, but I've been told that faad supports SBR...
> But when SBR is signalled the detected sample rate has to be multiplied by
> two.
>
>

It's not consistent with the way an HE-AAC stream sounds played back
without the SBR. Without SBR HE-AAC streams play back with the upper
frequencies missing at the appropriate tempo.

Furthermore this stream plays back too fast at 22050 Hz but too slow
at 11025 Hz.

> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ?Luca
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