[gst-devel] RE : Re: AMR caps incompatibility between muxer and encoder

[Benoit Fouet]

SP GLE wrote:
> Hi,
> thanks for your answer, but if i change the amr decoder (amrnbdec) i
> also have to change :
> qtdemux, amrnbdec, rtpamrpay, rtpamrdepay,...
>   
i don't think so. as far as i know, only the amr dec/enc lpugin is
handling audio/AMR data, so if you change it there, it chould be ok to
make the stuf work.
> gst-ffmpeg and amr elements seems to handle the same thing with two
> different names, 'audio/AMR' and 'audio/x-amr-nb'. 
>   
that's true, and that's why the caps intersection is NULL
> Is it possible to 'force' negotiation to handle differents encoding
> names in capabilities as the same entity, something like an adapter.
>   
you can make a basic plugin which just copies data on its sink pad to
its source pad, with only the caps that change, but i really think this
is not the right thing to do :)

-- Ben
> Thanks.
>
>
> --- Benoit Fouet <benoit.fouet at purplelabs.com> a écrit :
>
>   
>> Hi
>>
>> SP GLE wrote:
>>     
>>> Hi, 
>>> I'm trying to link an 'amrnbenc' element and a 'ffmux_mov',
>>> amrnbenc SRC caps are
>>>    Capabilities:
>>>       audio/AMR
>>>                    rate: 8000
>>>                channels: 1
>>>
>>> ffmux_mov SINK Caps are
>>>       audio/x-amr-nb
>>>                    rate: [ 8000, 96000 ]
>>>                channels: [ 1, 2 ]
>>>
>>> so linking seems incompatible, how can i link these elements ? Is
>>>       
>> there
>>     
>>> a way to change capabilities ?
>>>
>>> failed negotiation between pads is attached for the following cmd :
>>> GST_DEBUG=4 GST_DEBUG_NO_COLOR=1  gst-launch audiotestsrc !
>>> audioconvert ! amrnbenc ! ffmux_mov ! filesink location=/tmp/f.mov
>>>
>>> Thanks.
>>>   
>>>       
>> you have to change the source code of amr decoder, so that it is
>> audio/x-amr-nb too on its sink pad.
>> then compile and install back the library, and this should be ok :)
>>
>> Hope that helps,
>>
>> -- Ben
>>
>>
>>     
>
>
>
> 	
>
> 	
> 		
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