AAC not played - Error from decoder (ffdec_aac)

[Sudarshan Bisht]

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
>>>
>>>
>>
>> _______________________________________________
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>> gstreamer-devel at lists.freedesktop.org
>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
>>
>
>
> --
> Regards,
>
> Sudarshan Bisht
>



-- 
Regards,

Sudarshan Bisht
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