GStreamer Plugin Writer's Guide (0.8.7.3) | ||
---|---|---|
<<< Previous | Things to check when writing an element | Next >>> |
Elements should never use their standard output for debugging (using functions such as printf () or g_print ()). Instead, elements should use the logging functions provided by GStreamer, named GST_DEBUG (), GST_INFO (), GST_INFO (), GST_WARNING () and GST_ERROR (). The various logging levels can be turned on and off at runtime and can thus be used for solving issues as they turn up.
Ideally, elements should use their own debugging category. Most elements use the following code to do that:
GST_DEBUG_CATEGORY_STATIC (myelement_debug); #define GST_CAT_DEFAULT myelement_debug [..] static void gst_myelement_class_init (GstMyelementClass *klass) { [..] GST_DEBUG_CATEGORY_INIT (myelement_debug, "myelement", 0, "My own element"); } |
At runtime, you can turn on debugging using the commandline --gst-debug=myelement:5.
<<< Previous | Home | Next >>> |
Things to check when writing an element | Up | Querying, events and the like |