<div dir="ltr"> <div class="gmail_extra"> <div class="gmail_quote">On Wed, Oct 26, 2016 at 9:19 AM, Sebastian Dröge <<a href="mailto:sebastian@centricular.com" target="_blank">sebastian@centricular.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">On Tue, 2016-10-25 at 21:01 +0200, ano ona wrote: > Hi, i'm new to gstreamer, played a little with the command line and > the C API. I have many issues, but don't know if it's coming from a > bad usage, my distro, or the framework itself. Sorry if the answer is > obvious. > > My goal is to build a camera triggered by a PIR sensor on the > beagleboard black (BBB). > > I made test on laptop and the BBB. > > Here, i'll address an issue, i have on both the BBB and the laptop. > Both are on ArchLinux. > > So, i'll start with one that is quite annoying knowing my goal. > > I have this problem, on laptop and BBB, with cmd-line and API. > > GStreamer Core Library version 1.9.90 > kernel 4.8.4-1-ARCH > > Here, is a link of the log of the command : > > gst-launch-1.0 v4l2src device=/dev/video0 ! 'video/x- > raw,format=YUY2,width=960,height=544,framerate=20/1' ! jpegenc ! > rtpjpegpay ! fakesink &> log.txt > > <a href="http://pastebin.com/4WbpyCau" rel="noreferrer" target="_blank">http://pastebin.com/4WbpyCau</a> > > U can see at line 151-152 the time it takes : 13scec > > maybe it's gst_v4l2_object_probe_caps that takes this time ? Take a look at a full debug log to check where time is spent, or use a profiler for that. A debug log should be enough for this huge amount of time though. It could be anything really. You probably also want to add a queue after v4l2src in your pipeline to make it possible that v4l2src and the jpeg encoding can run on different CPU (cores). It could be the probing though, maybe we run into a tricky case here and probe too many formats, which might be slow with your camera to do. -- Sebastian Dröge, Centricular Ltd · <a href="http://www.centricular.com" rel="noreferrer" target="_blank">http://www.centricular.com</a> _______________________________________________ gstreamer-devel mailing list <a href="mailto:gstreamer-devel@lists.freedesktop.org" target="_blank">gstreamer-devel@lists.freedesktop.org</a> <a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel" rel="noreferrer" target="_blank">https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</a> </blockquote></div> </div><div class="gmail_extra">The log is 13Mb : <a href="https://github.com/ano-ona/peekamboo/blob/master/log2.txt">https://github.com/ano-ona/peekamboo/blob/master/log2.txt</a> </div><div class="gmail_extra">and the compressed one : <a href="https://github.com/ano-ona/peekamboo/blob/master/log2.tar.gz">https://github.com/ano-ona/peekamboo/blob/master/log2.tar.gz</a> </div><div class="gmail_extra"> gst-launch-1.0 v4l2src device=/dev/video0 ! 'video/x-raw,format=YUY2,width=960,height=544,framerate=20/1' ! queue ! jpegenc ! rtpjpegpay ! fakesink &> log2.txt </div><div class="gmail_extra">there are 2 functions(log line) taking each 7 sec. </div></div>