Hi Zheng :<br><br> i have installed the gst-plugin-bad and gst-ffmpeg.<br><br>$ ls gstreamer-0.10/libgstffmpeg.so<br>gstreamer-0.10/libgstffmpeg.so<br><br>Regards,<br>Bill<br><br>在 2012-04-17 09:31:07，"Zhang, Zheng" <zheng.zhang@intel.com> 写道：<br> <blockquote id="isReplyContent" style="PADDING-LEFT: 1ex; MARGIN: 0px 0px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid"> <style></style> <div class="WordSection1"> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Missing element: MPEG-4 Video decoder<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;font-family:"Courier New";color:#00B050">U don’t have mpeg4 decoder, need install <a href="http://gstreamer.freedesktop.org/modules/gst-plugins-bad.html">gst-plugin-bad</a> or <a href="http://gstreamer.freedesktop.org/modules/gst-ffmpeg.html">gst-ffmpeg</a><o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;font-family:"Courier New";color:#00B050"><o:p> </o:p></span></p> <p class="MsoNormal" style="text-align:justify;text-justify:inter-ideograph"><span lang="EN-US" style="font-size:14.0pt;font-family:"Courier New";color:#00B050">-Zheng<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US" style="font-size:14.0pt;font-family:"Courier New";color:#00B050"><o:p> </o:p></span></p> <p class="MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> gstreamer-devel-bounces+zheng.zhang=<A href="mailto:intel.com@lists.freedesktop.org">intel.com@lists.freedesktop.org</A> [mailto:gstreamer-devel-bounces+zheng.zhang=<A href="mailto:intel.com@lists.freedesktop.org">intel.com@lists.freedesktop.org</A>] <b> On Behalf Of </b>xiaowen<br> <b>Sent:</b> Monday, April 16, 2012 5:27 PM<br> <b>To:</b> <A href="mailto:edward.hervey@collabora.co.uk">edward.hervey@collabora.co.uk</A>; <A href="mailto:sebastian.droege@collabora.co.uk">sebastian.droege@collabora.co.uk</A><br> <b>Subject:</b> gstreamer<o:p></o:p></span></p> <p class="MsoNormal"><span lang="EN-US"><o:p> </o:p></span></p> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Hi:<o:p></o:p></span></p> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">    I am compliting the gstremer,when i run "gst-launch -v playbin2 uri=file:///sdcard/b.mp4",there are some errors.Could you help me ?<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p> </div> <div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: connection-speed = 0<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: source = (GstFileSrc) source<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20/GstTypeFindElement:typefind.GstPad:src: caps = video/quicktime, variant=(string)iso<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Pipeline is PREROLLING ...<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20/GstQTDemux:qtdemux0.GstPad:sink: caps = video/quicktime, variant=(string)iso<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Missing element: MPEG-4 Video decoder<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">WARNING: from element /GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: No decoder available for type 'video/ mpeg, mpegversion=(int)4, parsed=(boolean)true, systemstream=(boolean)false'.<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Additional debug info:<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">/opt/gstreamer/external/gstreamer_aggregate/gst-plugins-base/gst/playback/gsturidecodebin.c(867): unknown_type_cb (): /GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0<o:p></o:p></span></p> </div> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black"><o:p> </o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Thank you.<o:p></o:p></span></p> </div> <div> <p class="MsoNormal"><span lang="EN-US" style="font-size:10.5pt;font-family:"Arial","sans-serif";color:black">Bill<o:p></o:p></span></p> </div> </div> <p class="MsoNormal" style="margin-bottom:12.0pt"><span lang="EN-US"><o:p> </o:p></span></p> </div> </blockquote><br><br><span title="neteasefooter"><span id="netease_mail_footer"></span></span>