<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> <div class="moz-cite-prefix">On 2018年10月10日 21:13, Nicolas Dufresne wrote: </div> <blockquote type="cite" cite="mid:a4a5ee397db14036f855f1c5b5de5b5aff56ce93.camel@ndufresne.ca"> <pre wrap="">Le mercredi 10 octobre 2018 à 13:53 +0800, Dengke Du a écrit : </pre> <blockquote type="cite"> <blockquote type="cite"> <pre wrap="">You are doing capture, software decode, software encode on a single thread, on the slowest PI. You should look forward using raw capture and omxh264enc, or doing directly encoded capture using rpicamsrc. </pre> </blockquote> <pre wrap=""> Thanks, but my device was USB camera, not raspberrypi camera module, does rpicamsrc working? </pre> </blockquote> <pre wrap=""> Only with Rasperry Pi Camera. Then try the other suggestion, which is to at try and leverage HW decoder/encoder. I don't know if the Pi Zero have multiple core, but you can also introduce queues in the pipeline to distribute the load. You can also reduce the framerate using "v4l2src ! videorate ! image/jpeg,framerate=5/1" to try and accommodate your small CPU. Just run "top" on the side, both on your PC and your Pi, you'll see the massive difference in CPU usage.</pre> </blockquote> I using: ----------------------------------------------------------------------------------------------------- test-launch "( v4l2src ! videorate ! image/jpeg ! jpegdec ! queue ! x264enc tune=zerolatency ! rtph264pay name=pay0 pt=96 )" ----------------------------------------------------------------------------------------------------- on Raspberry pi zero wifi When the client connect to the Raspberry, I use top command show: ----------------------------------------------------------------------------------------------------- 309 root 20 0 102428 34276 9600 S 97.1 9.0 4:56.59 test-launch ----------------------------------------------------------------------------------------------------- The program exhaust almost the cpu. ----------------------------------------------------------------------------------------------------- cat /proc/cpuinfo | grep processor 0 ----------------------------------------------------------------------------------------------------- So using the USB camera on raspberry pi zero wifi was a bad choice. <blockquote type="cite" cite="mid:a4a5ee397db14036f855f1c5b5de5b5aff56ce93.camel@ndufresne.ca"> <pre wrap=""> Nicolas </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> </body> </html>