Its obvious from the log that you are missing mpeg4 video decoder plugin, install that :) Most probably you would find that in gst-ffmpeg package. <div><br><br><div class="gmail_quote">2012/4/16 xiaowen <span dir="ltr"><<a href="mailto:zhongxiaowenhuman@163.com">zhongxiaowenhuman@163.com</a>></span><br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style="line-height:1.7;font-size:14px;font-family:arial">Hi:<div> 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 ?</div>
<div><br></div><div><div><br></div><div>/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: connection-speed = 0</div><div>/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: source = (GstFileSrc) source</div><div>/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20/GstTypeFindElement:typefind.GstPad:src: caps = video/quicktime, variant=(string)iso</div>
<div>Pipeline is PREROLLING ...</div><div>/GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0/GstDecodeBin2:decodebin20/GstQTDemux:qtdemux0.GstPad:sink: caps = video/quicktime, variant=(string)iso</div><div>Missing element: MPEG-4 Video decoder</div>
<div>WARNING: from element /GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0: No decoder available for type 'video/
mpeg, mpegversion=(int)4, parsed=(boolean)true, systemstream=(boolean)false'.</div><div>Additional debug info:</div><div>/opt/gstreamer/external/gstreamer_aggregate/gst-plugins-base/gst/playback/gsturidecodebin.c(867): unknown_type_cb (): /GstPlayBin2:playbin20/GstURIDecodeBin:uridecodebin0</div>
</div><div><br></div><div><br></div><div>Thank you.</div><div>Bill</div></div><br><br><span title="neteasefooter"><span></span></span><br>_______________________________________________<br>
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<br></blockquote></div><br><br clear="all"><div><br></div>-- <br>Regards,<br><br>Sudarshan Bisht<br>
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