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]" <<a href="/user/SendEmail.jtp?type=node&node=4671770&i=0" target="_top" rel="nofollow" link="external">[hidden email]</a>> 写道： <div class='shrinkable-quote'> >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. > ><a href="http://cgit.freedesktop.org/~slomo/gst-sdk-tutorials/tree/gst-sdk/tutorials" target="_top" rel="nofollow" link="external">http://cgit.freedesktop.org/~slomo/gst-sdk-tutorials/tree/gst-sdk/tutorials</a> >(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 · <a href="http://www.centricular.com" target="_top" rel="nofollow" link="external">http://www.centricular.com</a> > >_______________________________________________ >gstreamer-devel mailing list >[hidden email] ><a href="http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_top" rel="nofollow" link="external">http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> > > >signature.asc (968 bytes) Download Attachment > > > >If you reply to this email, your message will be added to the discussion below: ><a href="http://gstreamer-devel.966125.n4.nabble.com/How-to-link-element-to-pipeline-in-android-tp4671727p4671761.html" target="_top" rel="nofollow" link="external">http://gstreamer-devel.966125.n4.nabble.com/How-to-link-element-to-pipeline-in-android-tp4671727p4671761.html</a> >To unsubscribe from How to link element to pipeline in android?, click here. >NAML</div> <hr align="left" width="300" /> View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/How-to-link-element-to-pipeline-in-android-tp4671727p4671770.html">Re:Re: How to link element to pipeline in android?</a> Sent from the <a href="http://gstreamer-devel.966125.n4.nabble.com/">GStreamer-devel mailing list archive</a> at Nabble.com.