<html><head></head><body><div style="color:#000; background-color:#fff; font-family:lucida console, sans-serif;font-size:13px"><div id="yui_3_16_0_ym19_1_1514020001854_9003">Hi,</div><div id="yui_3_16_0_ym19_1_1514020001854_9004"><br></div><div id="yui_3_16_0_ym19_1_1514020001854_9005">Try adding a videoconvert or decodebin between the autovideosrc and the autovideosink.<br></div><div id="yui_3_16_0_ym19_1_1514020001854_9006"><span><br></span></div><div id="yui_3_16_0_ym19_1_1514020001854_9012"><span>Philippe.</span></div> <div class="qtdSeparateBR"><br><br></div><div class="yahoo_quoted" style="display: block;"> <div style="font-family: lucida console, sans-serif; font-size: 13px;"> <div style="font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; font-size: 16px;"> <div dir="ltr"><font face="Arial" size="2"> Le Vendredi 22 décembre 2017 23h14, pangit_ako <hamburgerstephen@gmail.com> a écrit :<br></font></div> <br><br> <div class="y_msg_container"><div dir="ltr">Greetings, <br></div><div dir="ltr"><br></div><div dir="ltr"> I am new to GStreamer...please excuse my ignorance...I am trying to learn<br></div><div dir="ltr">this as quickly as I am able. I have the program(s) installed (Windows<br></div><div dir="ltr">Vista) and have fired up the command line. I type the following 'test'<br></div><div dir="ltr">pipeline...and it works just fine:<br></div><div dir="ltr"><br></div><div dir="ltr">gst-launch-1.0.exe videotestsrc ! autovideosink<br></div><div dir="ltr"><br></div><div dir="ltr"> This also works fine when I change the properties to 'snow', 'ball',<br></div><div dir="ltr">'red'...etc...<br></div><div dir="ltr"><br></div><div dir="ltr"> However when I attempt to use my webcam (by using 'autovideosrc'), I get<br></div><div dir="ltr">an error of which I'm not exactly sure to what it is referring...here is the<br></div><div dir="ltr">command followed by the output generated from GStreamer:<br></div><div dir="ltr"><br></div><div dir="ltr">gst-launch-1.0 autovideosrc ! video/x-raw,width=640,height=480 ! jpegenc !<br></div><div dir="ltr">rtpjpegpay ! udpsink host=127.0.0.1 port=5200<br></div><div dir="ltr"><br></div><div dir="ltr">"setting pipeline to PAUSED...<br></div><div dir="ltr">"pipeline is live and does not need PREROLL...<br></div><div dir="ltr">ERROR from element<br></div><div dir="ltr">/GstPipeline:pipeline0/GstAutoVideoSrc:autovideosrc0/GstKsVideoSrc:autovideosrc0-actual-src-ksvide:<br></div><div dir="ltr">internal data stream error.<br></div><div dir="ltr">Additional debug info:<br></div><div dir="ltr">gstbasesrc.c(2939):<br></div><div dir="ltr">gst-base-src-loop():/GstPipeline:pipeline0/GstAutoVideoSrc:autovideosrc0/GstKsVideoSrc:autovideosrc0-actual-video-src-ksvide:<br></div><div dir="ltr">streaming stoppped, reason not-negotiated (-4)<br></div><div dir="ltr">ERROR: pipeline doesn't want to preroll...<br></div><div dir="ltr">Setting pipeline to PAUSED...<br></div><div dir="ltr">Setting pipeline to READY...<br></div><div dir="ltr">Setting pipleine to NULL...<br></div><div dir="ltr">Freeing pipeline..."<br></div><div dir="ltr"><br></div><div dir="ltr"> I believe the same error occurs using an even more simplified command of<br></div><div dir="ltr">the above:<br></div><div dir="ltr"><br></div><div dir="ltr">gst-launch-1.0 autovideosrc ! autovideosink<br></div><div dir="ltr"><br></div><div dir="ltr"> My system is an Acer TM 5720 laptop...Windows Vista OS...I know my built-in<br></div><div dir="ltr">webcam (Acer Crystal Eye) is functioning...because it seems to work without<br></div><div dir="ltr">any problems in other applications...so it is not the webcam or a driver<br></div><div dir="ltr">issue. I seem to see this same error message no matter what I use as a<br></div><div dir="ltr">'src' element...? It is possible this is an OS problem (perhaps MS Vista is<br></div><div dir="ltr">not supported)...??? <br></div><div dir="ltr"><br></div><div dir="ltr"> Any insight about what the problem might be would be greatly<br></div><div dir="ltr">appreciated...again remember I'm new to GStreamer so I apologize in advance. <br></div><div dir="ltr">Regards.<br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr"><br></div><div dir="ltr">--<br></div><div dir="ltr">Sent from: <a href="http://gstreamer-devel.966125.n4.nabble.com/" target="_blank">http://gstreamer-devel.966125.n4.nabble.com/</a><br></div><div dir="ltr">_______________________________________________<br></div><div dir="ltr">gstreamer-devel mailing list<br></div><div dir="ltr"><a ymailto="mailto:gstreamer-devel@lists.freedesktop.org" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a><br></div><div dir="ltr"><a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a><br></div><br><br></div> </div> </div> </div></div></body></html>