category to log
level of the message
the file that emitted the message, usually the FILE identifier
the function that emitted the message
the line from that the message was emitted, usually LINE
the object this message relates to, or null if none
the actual message
Optionaluser_data: anythe FILE* to log to
The default logging handler used by GStreamer. Logging functions get called whenever a macro like GST_DEBUG or similar is used. By default this function is setup to output the message and additional info to stderr (or the log file specified via the GST_DEBUG_FILE environment variable) as received via
user_data.You can add other handlers by using
gst_debug_add_log_function(). And you can remove this handler by calling gst_debug_remove_log_function(gst_debug_log_default);