<html><head><meta http-equiv="Content-Type" content="text/html charset=windows-1252"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">Hi<div><br></div><div>Perhaps try a couple things:</div><div>- run with --gst-debug-level=4 </div><div>(which may give more info).</div><div><br></div><div>I know when I ran 2 USB video cams with v4l2 source, there was a bandwidth problem trying to view them both at the same time. In that case I had to do a couple things:</div><div>--- set up 'quirks' for my video driver</div><div>#rmmod ucvvideo </div><div>#modprobe ucvideo quirks=128<br><div><br></div><div>And even with that it, I have to set one of the cameras to 320x240 - otherwise it just halts.</div><div><br></div><div>Try the gst-debug-level setting above. The output is verbose, but hopefully something in the output that will make it obvious</div><div><br></div><div>Cheers</div><div>Tim<br class="Apple-interchange-newline"><blockquote type="cite"> Hi everybody!<br> I'm trying to combine two v4l2 streams into one with the latest<br>gstreamer-1.4.3. First of all, I want to test the videomixer function with<br>gst-launch-1.0 use the follow command:<br> gst-launch-1.0 v4l2src device=/dev/video0 ! video/x-raw ! videobox<br>left=0 border-alpha=0 ! alpha ! queue ! videomixer name=mix ! videoconvert !<br>xvimagesink sync=false \<br>v4l2src device=/dev/video1 ! video/x-raw ! alpha ! videobox left=-704<br>border-alpha=0 ! queue ! mix.<br><br> Unfortunately it not worked and appeared the follow error:<br> Setting pipeline to PAUSED ...<br> Pipeline is live and does not need PREROLL ...<br> Setting pipeline to PLAYING ...<br> New clock: GstSystemClock<br> ERROR: from element /GstPipeline:pipeline0/GstV4l2Src:v4l2src0:<br>Internal data flow error.<br> Additional debug info:<br> gstbasesrc.c(2933): gst_base_src_loop ():<br>/GstPipeline:pipeline0/GstV4l2Src:v4l2src0:<br> streaming task paused, reason not-negotiated (-4)<br> Execution ended after 0:00:00.000593582<br> Setting pipeline to PAUSED ...<br> Setting pipeline to READY ...<br> Setting pipeline to NULL ...<br> Freeing pipeline ...<br><br> But if I test this function with gst-launch-0.10 as the follow<br>commands:<br> gst-launch-0.10 v4l2src device=/dev/video0 ! video/x-raw-yuv !<br>videobox left=0 border-alpha=0 ! alpha ! queue ! videomixer name=mix !<br>ffmpegcolorspace ! xvimagesink sync=false v4l2src device=/dev/video1 !<br>video/x-raw-yuv ! alpha ! videobox left=-704 border-alpha=0 ! queue ! mix.<br><br> Miraculously, the video wall works well!<br><br> So I guess maybe I should setup some parameters when use<br>gst-launch-1.0 but I was not do it, so appeared the error. <br> I need everyone's help! Tell me how to use gst-launch-1.0 to combine<br>v4l2 streams into one! <br> Thanks very much!<br><br><br><br><br><br>--<br>View this message in context: <a href="http://gstreamer-devel.966125.n4.nabble.com/About-combine-v4l2-streams-into-one-tp4669778.html">http://gstreamer-devel.966125.n4.nabble.com/About-combine-v4l2-streams-into-one-tp4669778.html</a><br>Sent from the GStreamer-devel mailing list archive at <a href="http://Nabble.com">Nabble.com</a>.<br>_______________________________________________<br>gstreamer-devel mailing list<br><a href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a><br>http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel<br></blockquote></div><br><div apple-content-edited="true">
<span><img height="40" width="88" id="829f3b38-8474-4b00-9379-46e858e66b9e" apple-width="yes" apple-height="yes" src="cid:image001.jpg@01CBC38C.E770FAD0"></span><span><img height="3" width="574" id="583569a1-40b3-441c-a343-36103d56c3d7" apple-width="yes" apple-height="yes" src="cid:image002.gif@01CBC38C.E770FAD0"></span><div style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><b><br class="Apple-interchange-newline"><br class="Apple-interchange-newline"><br class="Apple-interchange-newline">Tim Wood – </b><b><span style="color: rgb(192, 0, 0); ">Head of Game Development</span></b></div><div style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; color: black; ">Visionary</span><span style="font-size: 10pt; color: rgb(31, 73, 125); "> </span><b><span style="font-size: 10pt; color: rgb(192, 0, 0); ">i</span></b><span style="font-size: 10pt; color: black; ">Gaming</span><i><span style="font-size: 10pt; color: rgb(31, 73, 125); "><o:p></o:p></span></i></div><div style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; color: rgb(31, 73, 125); ">T: +61 413 845 417<o:p></o:p></span></div><div style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; color: rgb(31, 73, 125); ">M: +61 413 845 317<o:p></o:p></span></div><div style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; color: rgb(31, 73, 125); ">Skype: tjwo1976<o:p></o:p></span></div><div style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="font-size: 10pt; color: rgb(31, 73, 125); "><a href="mailto:steve.obia@visionaryigaming.com" style="color: blue; text-decoration: underline; ">tim@visionaryigaming.com</a> <o:p></o:p></span></div><div style="color: rgb(0, 0, 0); font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px; margin: 0in 0in 0.0001pt; font-size: 11pt; font-family: Calibri, sans-serif; "><span style="color: rgb(31, 73, 125); "><a href="http://www.visionaryigaming.com/" style="color: blue; text-decoration: underline; "><span style="font-size: 10pt; ">www.visionaryigaming.com</span></a></span></div>
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