AAC not played - Error from decoder (ffdec_aac)

[Ashwini Sharma]

Hi,

Can you please tell me how to contruct the header from the given data, i.e.
sampling frequency, channels, profile etc

Thanks,
Ashwini

On Thu, Jul 21, 2011 at 11:39 AM, Sudarshan Bisht <bisht.sudarshan at gmail.com
> wrote:

> Or you can do same in your application also, then no need to write a
> plugin.
>
>
>
> On Thu, Jul 21, 2011 at 8:23 AM, Sudarshan Bisht <
> bisht.sudarshan at gmail.com> wrote:
>
>> Yes you can insert missing header to raw aac data by writing your own
>> plugin, and place it before decoder plugin.  But you need to have certain
>> information for header e.g. sampling frequency, channels, profile etc , and
>> all this you suppose to get from demuxer.
>>
>>
>>
>>
>> On Thu, Jul 21, 2011 at 7:43 AM, Ashwini Sharma <ak.ashwini at gmail.com>wrote:
>>
>>> HI Sudarshan,
>>>
>>> Adding aacparse didn't help. I get the parse error from aacparse.
>>>
>>> In my case, the file is read and demuxed by an application, which then
>>> gives the audio stream data to my pipeline (which consists of aapsrc !
>>> decoder ! alsasink ) for decoding and rendering.
>>>
>>> I am able to play ac3 and mp3. But AAC i am having failure still. I tried
>>> your inputs, but to no results.
>>>
>>> Can't there be case that we provide the missing header data to ffdec_aac
>>> thru some means..... any inputs please.
>>>
>>> Rgds,
>>> Ashwini
>>>
>>>   On Wed, Jul 20, 2011 at 8:19 PM, Sudarshan Bisht <
>>> bisht.sudarshan at gmail.com> wrote:
>>>
>>>> If you want to play it dynamically then you don't need to mux it again,
>>>> maybe you can use aacparse between demuxer and aac decoder plugin.
>>>>
>>>>
>>>>
>>>> On Wed, Jul 20, 2011 at 4:06 PM, Ashwini Sharma <ak.ashwini at gmail.com>wrote:
>>>>
>>>>> Hi Sudarshan,
>>>>>
>>>>> Thanks for your input.
>>>>>
>>>>> Can I play the AAC data dynamically, as suggested by you, instead of
>>>>> saving it into file.
>>>>>
>>>>> Like mux the incoming AAC data buffer and then decode it at the same
>>>>> time?
>>>>>
>>>>> rgds,
>>>>> -Ashwini
>>>>>
>>>>>
>>>>>
>>>>> On Wed, Jul 20, 2011 at 5:59 PM, Sudarshan Bisht <
>>>>> bisht.sudarshan at gmail.com> wrote:
>>>>>
>>>>>>
>>>>>> Demuxer outputs raw aac data, it does not have any header(ADIF/ADTS)
>>>>>> thats why you get that error message.
>>>>>>
>>>>>> To get the correct playable file, you again need to mux this raw aac
>>>>>> data using qtmux and then you get .m4a file.   And to play this .m4a file
>>>>>> you need to have qtdemux in your pipeline if you don't use
>>>>>> decodebin2/playbin2.
>>>>>>
>>>>>> I hope this will help you.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>   On Wed, Jul 20, 2011 at 1:52 PM, Ashwini Sharma <
>>>>>> ak.ashwini at gmail.com> wrote:
>>>>>>
>>>>>>>   Hi All,
>>>>>>>
>>>>>>> I have a demuxed audio stream (AAC encoded). When I try to play, i
>>>>>>> get an error "FFMpeg can not decode AAC data"
>>>>>>>
>>>>>>> The details are as follows:
>>>>>>>
>>>>>>> I have a video file which contain mpeg4 video and AAC audio. I Demux
>>>>>>> the file into Audio and video files. When i play the demuxed audio it fails.
>>>>>>>
>>>>>>> But when i reapeat the same test for AC3 or MP3 audios, it works
>>>>>>> fine.
>>>>>>>
>>>>>>>
>>>>>>> I think there is some mistake on my part when playing the AAC file.
>>>>>>> Someone please provide your inputs in getting it to play.
>>>>>>>
>>>>>>> Any help is greatly appreciated.
>>>>>>>
>>>>>>> -Ashwini
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> gstreamer-devel mailing list
>>>>>>> gstreamer-devel at lists.freedesktop.org
>>>>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>>>>
>>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Regards,
>>>>>>
>>>>>> Sudarshan Bisht
>>>>>>
>>>>>> _______________________________________________
>>>>>> gstreamer-devel mailing list
>>>>>> gstreamer-devel at lists.freedesktop.org
>>>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>>>
>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> gstreamer-devel mailing list
>>>>> gstreamer-devel at lists.freedesktop.org
>>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Regards,
>>>>
>>>> Sudarshan Bisht
>>>>
>>>> _______________________________________________
>>>> gstreamer-devel mailing list
>>>> gstreamer-devel at lists.freedesktop.org
>>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>>
>>>>
>>>
>>> _______________________________________________
>>> gstreamer-devel mailing list
>>> gstreamer-devel at lists.freedesktop.org
>>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>>
>>>
>>
>>
>> --
>> Regards,
>>
>> Sudarshan Bisht
>>
>
>
>
> --
> Regards,
>
> Sudarshan Bisht
>
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
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