<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body> Thanks so much for the tips. I first put queue in after the videoscales but it didn't seem to help. Using compositor seemed to fix it. I'm going to have to read up on compositor more to understand why that works. Cheers, Jim <div class="moz-cite-prefix">On 2021-02-16 9:14 a.m., Mathieu Duponchelle wrote: </div> <blockquote type="cite" cite="mid:3931dc72-7197-1e16-3f27-5cd782cd7417@centricular.com"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> That is a good point, you should also use compositor instead of videomixer, especially for live streams. In any case, using sync=false on the sinks is not a desirable solution, rather an admission of defeat :) Cheers, <div class="moz-signature">-- Mathieu Duponchelle · <a href="https://www.centricular.com" moz-do-not-send="true">https://www.centricular.com</a></div> <div class="moz-cite-prefix">On 2/16/21 11:20 AM, Ian Davidson wrote: </div> <blockquote type="cite" cite="mid:0c9c3d0f-a6a9-7fb1-daaf-0086bd709f8b@blueyonder.co.uk"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> I don't see any queue in your pipeline. A queue causes the pipeline to have a new thread - so all of your pipeline is one thread and is therefore only using one processor. Experiment with putting a queue after each videoscale. <div class="moz-cite-prefix">On 16/02/2021 09:02, Jim Ruxton wrote: </div> <blockquote type="cite" cite="mid:b26a31b7-e555-3768-fe17-361f483bd85d@gmail.com"> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> Just discovered that putting sync=false after autovideosink solved my problem. Jim <div class="moz-cite-prefix">On 2021-02-16 2:50 a.m., Jim Ruxton wrote: </div> <blockquote type="cite" cite="mid:cf1c3101-6fb7-29af-08e6-541ae8565f45@gmail.com"> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> I am trying to combine 2 video streams. One from my laptop camera and one from an external webcam. I'm using the following pipeline and getting very choppy results. Neither my CPU or GPU seem to be working hard. Any ideas how to make this less choppy? <pre class="western" style="margin-bottom: 0.5cm">./gst-launch-1.0 v4l2src device=/dev/video4 ! videoscale ! videoconvert ! video/x-raw,format=YUY2, framerate=30/1, width=640, height=480! alpha alpha=1 ! videobox border-alpha=0 left=-640 ! videomixer name=Mix ! videoconvert ! autovideosink v4l2src device=/dev/video2 ! videoscale ! videoconvert ! video/x-raw, format=YUY2, framerate=30/1, width=640, height=480! alpha alpha=1 ! videobox border-alpha=0 right=-640 ! Mix.</pre> Thanks, Jim <style type="text/css">pre { background: transparent }pre.western { font-family: "Liberation Mono", monospace; font-size: 10pt }pre.cjk { font-family: "Noto Sans Mono CJK SC", monospace; font-size: 10pt }pre.ctl { font-family: "Liberation Mono", monospace; font-size: 10pt }p { margin-bottom: 0.25cm; line-height: 115%; background: transparent }strong { font-weight: bold }</style> </blockquote> <fieldset class="mimeAttachmentHeader"></fieldset> <pre class="moz-quote-pre" wrap="">_______________________________________________ gstreamer-devel mailing list <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org" moz-do-not-send="true">gstreamer-devel@lists.freedesktop.org</a> <a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" moz-do-not-send="true">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </pre> </blockquote> <fieldset class="mimeAttachmentHeader"></fieldset> <pre class="moz-quote-pre" wrap="">_______________________________________________ gstreamer-devel mailing list <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org" moz-do-not-send="true">gstreamer-devel@lists.freedesktop.org</a> <a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" moz-do-not-send="true">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </pre> </blockquote> <fieldset class="mimeAttachmentHeader"></fieldset> <pre class="moz-quote-pre" wrap="">_______________________________________________ gstreamer-devel mailing list <a class="moz-txt-link-abbreviated" href="mailto:gstreamer-devel@lists.freedesktop.org">gstreamer-devel@lists.freedesktop.org</a> <a class="moz-txt-link-freetext" href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </pre> </blockquote> </body> </html>