How to convert variable buffer size to fixed size

[Marc Rechte]

Thanks a  lot for the suggestion, I posted an issue to the Open-AVB project.

Would you suggest some plugin to study in order to temporarily implement 
this missing conversion myself ?

Marc

Le 30/03/2016 19:06, Nicolas Dufresne a écrit :
> Le mercredi 30 mars 2016 à 18:27 +0200, Peter Maersk-Moller a écrit :
>> The modules rndbuffersize and chopmydata can chop a stream of bytes 
>> into a fixed buffer size stream although I don't know if your 
>> protocol needs the chunks to be framed like RTP over TCP where a 
>> length specifier is needed.
>
> Also, arguably, avbsink element should handle this trivial 
> transformation by itself.  Please report the issue to the author. This 
> is a third party plugin.
>
> https://github.com/AVnu/Open-AVB/issues
>
>>
>> Regards
>>
>>
>> On Wed, Mar 30, 2016 at 6:01 PM, Marc Rechte <mrechte at studelec-sa.com 
>> <mailto:mrechte at studelec-sa.com>> wrote:
>>> Hello,
>>>
>>> Testing the Open-AVB gstreamer plugin (avbsink), I am trying to 
>>> stream the output of a UVC camera to an ethernet device, using this 
>>> command:
>>>
>>> # gst-launch-1.0 -e uvch264src device=/dev/video0 name=zoro 
>>> auto-start=true  zoro.vidsrc ! 
>>> video/x-h264,width=1280,height=720,framerate=30/1 ! tee name=t ! 
>>> queue ! avdec_h264 ! xvimagesink sync=false t. ! queue ! avbsink 
>>> interface=enp2s0
>>>
>>> The problem is that avbsink expects a fixed blocksize of 1024 bytes. 
>>> The uvch264src has no blocksize property.
>>>
>>> Please would you have any suggestion to make sure blocks passed to 
>>> avbsink have a fixed size ?
>>>
>>> Thanks
>>>
>>>
>>>
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>>>
>>
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-- 


  Marc Rechte


    Ingénieur Informatique Industrielle
    /Industrial IT Engineer/


    Tél : +33 (0)5 61 41 31 21
    mrechte at studelec-sa.com

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