<html> <head> <meta content="text/html; charset=utf-8" http-equiv="Content-Type"> </head> <body bgcolor="#FFFFFF" text="#000000"> Sorry to say but compositor1.4.4 is A BadPlugin in Gst-1.0. And also is glvideomixer while videomixer is Good-Plugin. Did not have any luck with compositor and glvideomixer creates dark pictures. I did not use glupload but glimagesink and it seemed to used a bit more CPU than videomixer. Robin. <div class="moz-cite-prefix">Den 03-04-2016 kl. 16:07 skrev Nicolas Dufresne: </div> <blockquote cite="mid:1459692421.21172.27.camel@gmail.com" type="cite"> <pre wrap="">As a first step, you should replace videomixer with compositor. The compositor element have the same interface but works with live sources correctly, and implement color conversion internally. Note that this is all done in software and will quickly max out the CPU capacity. As you want to apply GL shaders, best is to upload everything to GL in the first place. This can be done using glupload and glcolorconvert elements. The equivalent in GL to compositor is glvideomixer. You should use fairly recent version of GStreamer (something Raspbian might not offer). Not everything is supported in term of GL feature on this platform. Another point I'd like to bring, is that the v4l2 driver on RPI has never been fantastic. I don't know if anyone have worked on it since, but some people get better resulting using rpicamsrc, <a class="moz-txt-link-freetext" href="https://github.co">https://github.co</a> m/thaytan/gst-rpicamsrc Nicolas Le dimanche 03 avril 2016 à 05:30 -0700, nicko a écrit : </pre> <blockquote type="cite"> <pre wrap="">For the sake of completeness, here is the question - I would really appreciate help on this as I'm completely stuck: I have a Raspberry Pi Compute Module with 2 cameras. I'm trying to use gstreamer with v4l2src selecting /dev/video0 & /dev/video1 to continually run at about 20FPS and use videomixer to combine the images side-by- side then output H.264 over RTP to a UDP port (read by another host). Somewhere in the comand line, I'm going to need to include glshader to apply some distortion to each image before the merge... The default (current) RPi v4l2src driver does not support two cameras, but as of today a beta is available that does, however it requires the beta 4.4.6 kernel. The problem I'm having is in getting the mixer connected. #!/bin/bash -x # # Script to start RPi Compute Module streaming over RTP (RFC3984) # from both cameras # FPS=20 # Frames per second WIDTH=640 # Image width HEIGHT=480 # Image height UPLINK_HOST=192.168.1.73 # Receiving host PORT=5200 # UDP port # # TESTING WITH ONE CAMERA ONLY FOR THE MOMENT # function start_streaming { gst-launch-1.0 -ve videomixer name=mixer \ ! x264enc \ ! h264parse \ ! rtph264pay config-interval=10 pt=96 \ ! udpsink host=$UPLINK_HOST port=$PORT \ v4l2src device=/dev/video0 \ ! video/x- raw,format=AYUV,width=$WIDTH,height=$HEIGHT,framerate=$FPS/1 \ ! mixer. } # Start streaming on both cameras simultaneously echo Image size: $WIDTH x $HEIGHT echo Frame rate: $FPS echo Starting cameras 0 and 1 streaming to $UPLINK_HOST:$PORT start_streaming # Wait until everything has finished wait exit 0 # end What I'm getting is the rather useless (to me) message: WARNING: erroneous pipeline: could not link v4l2src0 to mixer I've fiddled about rather a lot and got nowhere - it's probably something trivial, but be blowed if I can see it ! Many thanks Nick -- View this message in context: <a class="moz-txt-link-freetext" href="http://gstreamer-devel.966125.n4.nabble">http://gstreamer-devel.966125.n4.nabble</a> .com/Putting-together-a-complex-gstreamer-command-line- tp4676713p4676714.html Sent from the GStreamer-devel mailing list archive at Nabble.com. _______________________________________________ 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> <fieldset class="mimeAttachmentHeader"></fieldset> <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> </blockquote> </body> </html>