<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 http-equiv=Content-Type content="text/html; charset=gb2312"> <meta name=Generator content="Microsoft Word 11 (filtered medium)"> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="State"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="City"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="place"/> <o:SmartTagType namespaceuri="urn:schemas-microsoft-com:office:smarttags" name="PersonName"/>  <style>  </style> </head> <body lang=ZH-CN link=blue vlink=blue> <div class=Section1> Refer to the following link:<o:p></o:p> <a href="http://farsight.sourcearchive.com/documentation/0.1.10-2/rtpstream_8c-source.html">http://farsight.sourcearchive.com/documentation/0.1.10-2/rtpstream_8c-source.html</a><o:p></o:p> <o:p> </o:p> Some actions need to be done in callback function.<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年3月6日 20:40 To: <st1:PersonName w:st="on">Discussion of the development of GStreamer</st1:PersonName> Subject: Re: [gst-devel] channel changing dvbsrc plugin<o:p></o:p> </div> <o:p> </o:p> hi all,          Thanks halley, I tried blocking the source pad of the mpegtsdemux but it dint work. What ia happening is , when i set the state of the pipeline to READY , the mpegtsdemux removes its source pad which was linked to the sink of queue. So when i check for GST_PAD_IS_LINKED on the sink pad of the queue it return FALSE. So i directly link the sink of queue to the newly emitted source pad of the mpegtsdemux. I checked for the result of the gst_pad_link(srcpad, sinkpad); It is returning GST_PAD_LINK_OK. Why is the video getting freezed? regards,<o:p></o:p> <div> 2009/3/6 Zhao, Halley <<a href="mailto:halley.zhao@intel.com">halley.zhao@intel.com</a>><o:p></o:p> <div link=blue vlink=purple> <div> 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" target="_blank">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 windowtext 1.5pt;padding:0cm 0cm 0cm 4.0pt; border-color:-moz-use-text-color -moz-use-text-color -moz-use-text-color blue'> <div> <div class=MsoNormal align=center style='text-align:center'> <hr size=2 width="100%" align=center> </div> From: Sumanth V [mailto:<a href="mailto:sumanth.v@allaboutif.com" target="_blank">sumanth.v@allaboutif.com</a>] Sent: 2009年3月6日 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> <div> <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> </div> </div> </div> ------------------------------------------------------------------------------ Open Source Business Conference (OSBC), March 24-25, 2009, <st1:place w:st="on"><st1:City w:st="on">San Francisco</st1:City>, <st1:State w:st="on">CA</st1:State></st1:place> -OSBC tackles the biggest issue in open source: Open Sourcing the <st1:City w:st="on"><st1:place w:st="on">Enterprise</st1:place></st1:City> -Strategies to boost innovation and cut costs with open source participation -Receive a $600 discount off the registration fee with the source code: SFAD <a href="http://p.sf.net/sfu/XcvMzF8H" target="_blank">http://p.sf.net/sfu/XcvMzF8H</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><o:p></o:p> </div> <o:p> </o:p> </div> </div> </body> </html>