<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=gb2312"> <html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns:st1="urn:schemas-microsoft-com:office:smarttags" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style> </head> <body lang=ZH-CN link=blue vlink=purple> <div class=Section1> Try to block the upstream src pad before you link/unlink.<o:p></o:p> <o:p> </o:p> <a href="http://www.sfr-fresh.com/unix/privat/gstreamer-0.10.22.tar.gz:a/gstreamer-0.10.22/docs/design/part-block.txt">http://www.sfr-fresh.com/unix/privat/gstreamer-0.10.22.tar.gz:a/gstreamer-0.10.22/docs/design/part-block.txt</a><o:p></o:p> <o:p> </o:p> <o:p> </o:p> <div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center tabindex=-1> </div> From: Sumanth V [mailto:sumanth.v@allaboutif.com] Sent: 2009��3��6�� 3:37 To: <st1:PersonName w:st="on">Discussion of the development of GStreamer</st1:PersonName> Subject: [gst-devel] channel changing dvbsrc plugin<o:p></o:p> </div> <o:p> </o:p> Hi All,              I am writing a application using a dvbsrc plugin to play the incoming TV channels. How do i change the channels with out stopping the application? Right now i am doing it by changing the es-pid property of the mpegtsdemux plugin, i am able to to change the channels, but as soon as i change the channel , the video is getting freezed, its not playing. but i can change the channles. As soon as i shift to next channel, the video is getting freezed.          For the first time when i start the application it plays which ever channel i have selected, but later when i try to change the channels , the video is getting freezed. The method i am using to change the channel is :-  * when i want to change a channel, i set the pipeline to READY state and tune to a channel which i want to play and the set the "es-pid" property of the     mpegtsdemux plugin to the pid of the channel which i want to play.  * Set the pipeline back to PLAYING state.  * When the mpegtsdemux plugin generates a new pad for the new channel , i unlink the previous linked queue pad to the mpegtsdemux and then link to the new pad.  the pipeline is  gst-launch dvbsrc diseqc-source=0 frequency=10990000 symbol-rate=27500 polarity="v" code-rate-hp=3/4 ! mpegtsdemux ! queue ! mpeg2dec ! ffmpegcolorspace ! xvimagesink  Where am i going wrong here? Why is the video of the new channel  getting freezed?? regards, Sumanth       <o:p></o:p> </div> </div> </body> </html>