How to link element to pipeline in android?

[Yingsheng]

Hi Sebastian,
Thanks very much for your help!
Do initialize via Gstreamer.init( ) is necessary?
Now I want to use gstreamer instead of stagefright , and package interfaces of gstreamer player to native interfaces that could be called by java via jni.
l want to write executed application used C code and built  in  ndk-build ,that execute  on android , how could I do initialized used C code, and  then could use static plugins? 
Thanks a lot! 







在 2015-05-02 15:47:49，"Sebastian Dröge-3 [via GStreamer-devel]" <ml-node+s966125n4671761h40 at n4.nabble.com> 写道：
>On Di, 2015-04-28 at 22:08 -0700, Yingsheng wrote:
>
>> Hi,
>> I am a new learner of gstreamer and i want to port gstreamer to android.
>> Now
>> 1. I could build gstreamer using command "cerbero -c cross-android.cbc
>> package gstreamer-1.0" and create package "gstreamer-1.0-android-arm-1.5.0"
>> sucessfully.
>> 2. I could use ndk-build to build gstreamer package
>> "gstreamer-1.0-android-arm-1.5.0" and create libgstreamer_android.so.
>> 3. I wrote a application about to play mp3 file using c language, and
>> ndk-build sucessfully, and create a executed file.After I push the executed
>> file and "libgstreamer_android.so" to directory "/system/lib", I could not
>> executed the file.
>> Because I could not create element in app, such as:
>> source = gst_element_factory_make("audiotestsrc", "audio_source");
>> How could I do?
>That's not how you're supposed to use GStreamer on Android. You should
>do it like e.g. in the example applications here, i.e. include
>libgstreamer_android.so in your application and initialize it via
>GStreamer.init() from Java, and then use GStreamer from some C code that
>you call via JNI.
>
>http://cgit.freedesktop.org/~slomo/gst-sdk-tutorials/tree/gst-sdk/tutorials
>(android-tutorial 1-5)
>
>The important part here is how the initialization works, as
>libgstreamer_android.so contains static plugins that have to be
>explicitly initialized by something (GStreamer.init() in this case)
>before usage.
>
>--
>Sebastian Dröge, Centricular Ltd · http://www.centricular.com
>
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