[gst-devel] appsrc and appsink elements

[Andres Colubri]

Actually, I misread your instructions, and I forgot to copy the libs 
from gst-libs/gst/app/.libs to /usr/local/lib

But instead to copy them to /usr/local/lib I put them in /usr/lib, since 
all the other base gstreamer libraries are there by default, and now 
appsrc and appsink seem to work fine.

The only strange thing is that appsrc and appsink appear to be listed 
twice when running gst-inspect

Andres Colubri wrote:
> Hey Jure, many thanks for the info.
>
> I compiled libgstapp from source, and then copied libgstapp.so to 
> /usr/lib/gstreamer-0.10. After creating the symbolic links 
> libgstapp-0.10.so.0.0.0,  libgstapp-0.10.so.0  and libgstapp-0.10.so, 
> the appsrc and appsking plugins are found by gst-inspect, and also the 
> examples work now.
>
> Jure Zitnik wrote:
>> Hi Andres,
>> The appsrc and appsink are not part of the binary 
>> gstreamer-plugins-bad package on ubuntu 8.10 (reasoning is that they 
>> "still randomly change API and ABI" :-)
>> But you can always build them from source:
>> apt-get source gstreamer0.10-plugins-bad
>> cd gst-plugins-bad0.10-0.10.5 (you might need to cange the version here)
>> ./configure
>> make
>>
>> After successful build, you can copy required shared libraries 
>> manually (if you just need appsrc/appsink) as follows:
>> cp gst/app/.libs/libgstapp.so /usr/lib/gstreamer-0.10/
>> cp gst-libs/gst/app/.libs/libgstapp-0.10.so.0.0.0  /usr/local/lib
>> You might need to create additional symbolic links in /usr/local/lib 
>> (both linking to libgstapp-0.10.so.0.0.0) : libgstapp-0.10.so.0 and 
>> libgstapp-0.10.so
>>
>> Now use gst-inspect to see if everything works fine...
>>
>> Jure
>>
>> Andres Colubri wrote:
>>  
>>> Hello,
>>>
>>> I have tried to use appsrc, but for some reason it doesn't seem to be
>>> recognized (I'm using gst-plugins-bad 0.10.8 on ubuntu 0.8.10) by
>>> gstreamer. For example, when I run the appsrc_ex example, I get an
>>> assertion error right after
>>> app->src = gst_element_factory_make("appsrc", NULL);
>>> so seems that app->src is null
>>>
>>> Also, gst-inspect doesn't find neither appsrc nor appsink.
>>>
>>> Thanks
>>> Andres
>>>
>>> Wim Taymans wrote:
>>>      
>>>> On Wed, 2008-07-30 at 12:03 +0200, David SIORPAES wrote:
>>>>
>>>>          
>>>>> Hello,
>>>>>
>>>>> I would like to exchange buffers which are allocated and managed 
>>>>> by an
>>>>> application of mine to and from a GStreamer pipeline.
>>>>>
>>>>> By reading the documentation it looks like the appsrc/appsink are the
>>>>> solution for me, but I am also reading here
>>>>> http://gstreamer.freedesktop.org/data/doc/gstreamer/head/manual/html/section-data-spoof.html 
>>>>>
>>>>> that
>>>>>
>>>>> "New API is being developed at the moment to make data insertion and
>>>>> extraction less painful for applications. It can be found as 
>>>>> GstAppSrc
>>>>> and GstAppSink in the gst-plugins-bad module. At the time of writing
>>>>> (October 2007), this API is not quite stable and ready yet, even 
>>>>> though
>>>>> it may work fine for your purposes."
>>>>>
>>>>> So, may I ask whether it is safe to use such elements or not ? Or are
>>>>> there alternative solutions ?
>>>>>
>>>>>               
>>>> The versionsof appsink/appsrc in the latest release of gst-plugins-bad
>>>> are full-featured and ready for consumption. See
>>>> http://webcvs.freedesktop.org/gstreamer/gst-plugins-bad/examples/app/
>>>> for a whole bunch of examples of different use cases.
>>>>
>>>> Wim
>>>>
>>>>          
>>>>> Thanks,
>>>>>
>>>>> David S.
>>>>>
>>>>>
>>>>>
>>>>>
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