decoder, conv, sink, NULL); /* 8. 連連看 */ gst_element_link (source, demuxer); gst_element_link_many (decoder, conv, sink, NULL); /* 9. 註冊要處理的event */ g_signal_connect (demuxer, "pad-added", G_CALLBACK (on_pad_added), decoder); oggdemux動態產 生pad,所以產生 時才link decoder 前面的callback callback 吃的參數