Plugin writer's guide build fail on ubuntu 18.04

[Michael Gruner]

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.

There’s another tool in plugins bad you may use for older version of GStreamer. Here are some instructions:

https://developer.ridgerun.com/wiki/index.php?title=Creating_a_New_GStreamer_Element_or_Application_Using_Templates

Michael
www.ridgerun.com

> On 24 Apr 2021, at 02:25, ChrisLiuv via gstreamer-devel <gstreamer-devel at lists.freedesktop.org> wrote:
> 
> 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 at sha/src_gstplugin.c.o'.
> FAILED: gst-plugin/gstplugin at sha/src_gstplugin.c.o 
> cc  -Igst-plugin/gstplugin at 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 at sha/src_gstplugin.c.o' -MF
> 'gst-plugin/gstplugin at sha/src_gstplugin.c.o.d' -o
> 'gst-plugin/gstplugin at 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/
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