Gst_discoverer_xxx which lib

Newcomers
1

I wanted to try something with gst discoverer. But it fails at gst_discoverer_new();, which it aborts with undefined reference to 'gst_discoverer_new'.
The header gst/pbutils/gstdiscoverer.h is found.

I compiled it with the following command.

gcc -o main main.c `pkg-config --cflags --libs gstreamer-1.0 gstreamer-plugins-base-1.0`

I suspect that something is missing in pkg-config.

Does anyone have any advice?

2

You’ll have to use gstreamer-pbutils-1.0. The pkg-config files are always called after the underlying library in case of GStreamer.

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3

Thanks, that works.

 gcc -o main main.c `pkg-config --cflags --libs gstreamer-1.0 gstreamer-pbutils-1.0`

Thanks, that’s how it works.

How do you find these lib dependencies?

4

Check e.g. from the docs or the location of the header file in which library the API you want to use is.

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5

In the headers there is GST_xxx__API, do these say which lib you need?

const lib-name
GST_AUDIO_BAD_API gstreamer-bad-audio-1.0
GST_AUDIO_API gstreamer-audio-1.0
GST_VIDEO_API gstreamer-video-1.0
GST_BASE_API gstreamer-base-1.0
GST_PBUTILS_API gstreamer-pbutils-1.0
… …
6

Yes, that’s another indication

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