<div dir="ltr">Hi, zhangal:     Maybe the element `selector' can do some help for you. Eric Zhang <div class="gmail_quote">2008/9/5 zhangal <<a href="mailto:alzhang03@hotmail.com">alzhang03@hotmail.com</a>> <blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div>Hi,         I met some movies(like *.mkv and *.avi files) which include multi audio tracks and then my application can not switch audio when playback.       I tried to just unlink the demuxer and the audio decoder and then called gst-element-get-pad() to get another audio pad which will be linked to the audio decoder that is able to decode the audio. But I can not hear anything. The code looks like following   GstPad *src_pad, *sink_pad, *demux_src;    FAIL_CHECK (NULL == (demux_src = gst_element_get_pad(demuxer,"audio_01")));//Get anotherdemuxer source pad FAIL_CHECK (NULL == (sink_pad = gst_element_get_pad(a_decoder, "sink")));// Get audio decoder sink pad   src_pad = gst_pad_get_peer(sink_pad);//get the audio pad connected to decoder sink pad gst_element_set_state(player_status->bin, GST_STATE_PAUSED);  gst_pad_unli nk (src_pad, sink_pad); gst_pad_link(demux_src, sink_pad); gst_object_unref(src_pad);   gst_object_unref(sink_pad); gst_object_unref(demux_src); gst_element_set_state(player_status->bin, GST_STATE_PLAYING); //End   It seems that does not work well. Does anyone have the idea about this?   Thanks a lot     <hr>MSN上小游戏，工作休闲两不误！ <a href="http://im.live.cn/minigame" target="_blank">马上就开始玩！</a></div> ------------------------------------------------------------------------- This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world <a href="http://moblin-contest.org/redirect.php?banner_id=100&url=/" target="_blank">http://moblin-contest.org/redirect.php?banner_id=100&url=/</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.sourceforge.net">gstreamer-devel@lists.sourceforge.net</a> <a href="https://lists.sourceforge.net/lists/listinfo/gstreamer-devel" target="_blank">https://lists.sourceforge.net/lists/listinfo/gstreamer-devel</a> </blockquote></div> </div>