Problem of "undefined symbol"

[Sebastian Dröge]

On Do, 2016-03-10 at 01:17 -0800, little boy wrote:
> Hi,I am trying to write my own plugin,when I was installed my
> plugin,I find a problem:
> 
> (gst-plugin-scanner:17505): GStreamer-WARNING **: Failed to load
> plugin
> '/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so':
> /usr/local/lib/gstreamer-1.0/libgstjpgsrc.so: undefined symbol:
> gst_jpgsrc_smpte

This is a linking problem on your side. For whatever reason something
in your code uses a symbol "gst_jpgsrc_smpte" but it's not available in
the plugin. That's something you have to fix on your side.

> undefined symbol: gst_video_frame_map
> (/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so)
> undefined symbol: gst_video_chroma_resample_get_info
> (/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so)
> undefined symbol: gst_video_colorimetry_from_string
> (/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so)
> undefined symbol: gst_video_frame_unmap
> (/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so)
> undefined symbol: gst_video_format_get_info
> (/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so)
> undefined symbol: gst_video_chroma_resample_new
> (/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so)
> undefined symbol: gst_video_chroma_resample_free
> (/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so)
> undefined symbol: gst_video_info_from_caps
> (/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so)
> undefined symbol: gst_video_format_get_palette
> (/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so)
> undefined symbol: gst_video_info_init
> (/usr/local/lib/gstreamer-1.0/libgstjpgsrc.so)

For all these, you're not linking your plugin to libgstvideo-1.0.

-- 
Sebastian Dröge, Centricular Ltd · http://www.centricular.com

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