<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto">The build is failing because these APIs only exist on newer versions of GStreamer. GST_ELEMENT_REGISTER, for example, was added on 1.20. You have GStreamer 1.14 on your system. Unfortunately, gst-template is only available starting from 1.18, it seems.<div> </div><div>There’s another tool in plugins bad you may use for older version of GStreamer. Here are some instructions:</div><div> </div><div><a href="https://developer.ridgerun.com/wiki/index.php?title=Creating_a_New_GStreamer_Element_or_Application_Using_Templates">https://developer.ridgerun.com/wiki/index.php?title=Creating_a_New_GStreamer_Element_or_Application_Using_Templates</a></div><div> <div dir="ltr">Michael</div><div id="AppleMailSignature" dir="ltr">www.ridgerun.com</div><div dir="ltr"> <blockquote type="cite">On 24 Apr 2021, at 02:25, ChrisLiuv via gstreamer-devel <gstreamer-devel@lists.freedesktop.org> wrote: </blockquote></div><blockquote type="cite"><div dir="ltr">Hi, I have develop gstreamer application for about half year, I now try to write custom element because application code couldn't do my task, to separate side-by-side video, eg: a combined 2 sensor video data from MIPI CSI2, both have the same resolution/fps. According to plugin writer's guide, https://gstreamer.freedesktop.org/documentation/plugin-development/basics/boiler.html?gi-language=c My command is: git clone https://gitlab.freedesktop.org/gstreamer/gst-template.git cd gst-template meson builddir ninja -C builddir On ubuntu 18.04, its built-in gsteramer version is 1.14.5, but the meson.build request 1.19. I tried to modify meson.build version check, and then ninja is failed. ninja -C builddir ninja: Entering directory `builddir' [2/7] Compiling C object 'gst-plugin/gstplugin@sha/src_gstplugin.c.o'. FAILED: gst-plugin/gstplugin@sha/src_gstplugin.c.o cc -Igst-plugin/gstplugin@sha -Igst-plugin -I../gst-plugin -I/usr/include/gstreamer-1.0 -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -fdiagnostics-color=always -pipe -D_FILE_OFFSET_BITS=64 -Wall -Winvalid-pch -O0 -g -fPIC -pthread -DHAVE_CONFIG_H -MD -MQ 'gst-plugin/gstplugin@sha/src_gstplugin.c.o' -MF 'gst-plugin/gstplugin@sha/src_gstplugin.c.o.d' -o 'gst-plugin/gstplugin@sha/src_gstplugin.c.o' -c ../gst-plugin/src/gstplugin.c ../gst-plugin/src/gstplugin.c:102:45: error: expected ‘)’ before string constant GST_ELEMENT_REGISTER_DEFINE (myfirstplugin, "myfirstplugin", GST_RANK_NONE, ^~~~~~~~~~~~~~~ ../gst-plugin/src/gstplugin.c: In function ‘plugin_init’: ../gst-plugin/src/gstplugin.c:266:10: warning: implicit declaration of function ‘GST_ELEMENT_REGISTER’; did you mean ‘GST_ELEMENT_CAST’? [-Wimplicit-function-declaration] return GST_ELEMENT_REGISTER (myfirstplugin, plugin); I further check the gstreamer version of Ubuntu 20.04, is 1.16.x. So if I want to process the guide, do I need to build the latest gstreamer myself? Thanks a lot. -- Sent from: http://gstreamer-devel.966125.n4.nabble.com/ _______________________________________________ gstreamer-devel mailing list gstreamer-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel </div></blockquote></div></body></html>