GStreamer Application Development Manual (0.10.12) | ||
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When writing a GStreamer application, you can simply include gst/gst.h to get access to the library functions. Besides that, you will also need to intialize the GStreamer library.
Before the GStreamer libraries can be used, gst_init has to be called from the main application. This call will perform the necessary initialization of the library as well as parse the GStreamer-specific command line options.
A typical program [1] would have code to initialize GStreamer that looks like this:
Example 1. Initializing GStreamer
#include <gst/gst.h> int main (int argc, char *argv[]) { const gchar *nano_str; guint major, minor, micro, nano; gst_init (&argc, &argv); gst_version (&major, &minor, µ, &nano); if (nano == 1) nano_str = "(CVS)"; else if (nano == 2) nano_str = "(Prerelease)"; else nano_str = ""; printf ("This program is linked against GStreamer %d.%d.%d %s\n", major, minor, micro, nano_str); return 0; } |
Use the GST_VERSION_MAJOR, GST_VERSION_MINOR and GST_VERSION_MICRO macros to get the GStreamer version you are building against, or use the function gst_version to get the version your application is linked against. GStreamer currently uses a scheme where versions with the same major and minor versions are API-/ and ABI-compatible.
It is also possible to call the gst_init function with two NULL arguments, in which case no command line options will be parsed by GStreamer.
[1] | The code for this example is automatically extracted from the documentation and built under examples/manual in the GStreamer tarball. |
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