How to use appsink as the audio-sink of GES pipeline?

[Guofeng Zhang]

Hi,

I wonder if it was possible to use appsink as the audio-sink of the GES 
pipeline, so I create the following bin:
     string = g_strdup_printf ("encodebin name=encoder ! appsink 
caps=\"%s\" name=appsink", CAPS);
     bin = (GstBin *)gst_parse_launch (string, NULL);

then set encoder's profile:
     ebin = gst_bin_get_by_name (GST_BIN (bin), "encoder");
     g_object_set (ebin, "avoid-reencoding", TRUE, NULL);
     g_object_set (ebin, "profile", create_ogg_theora_profile(), NULL);

and last set it to be the audio-sink of the GESPipeline:
    ges_pipeline_preview_set_audio_sink (gespipeline, ebin);

but it does not work. I think it might be I did not link some elemet in 
GES pipeline to the encodebin (no way to emit request-pad signal), but I 
don't know how to do it.

Is it possible to use appsink in GES pipeline? if yes, how to do it?

Your help is very appreciated.

Thanks.

guofeng