These where causing broken links.
<FILE>gstflowcombiner</FILE>
<TITLE>GstFlowCombiner</TITLE>
<INCLUDE>gst/base/gstflowcombiner.h</INCLUDE>
+GstFlowCombiner
gst_flow_combiner_new
gst_flow_combiner_free
gst_flow_combiner_update_flow
<FILE>gstptpclock</FILE>
<TITLE>GstPtpClock</TITLE>
<INCLUDE>gst/net/net.h</INCLUDE>
+GST_PTP_CLOCK_ID_NONE
+
gst_ptp_init
gst_ptp_deinit
gst_ptp_is_initialized
GstPtpClock
gst_ptp_clock_new
+GstPtpStatisticsCallback
gst_ptp_statistics_callback_add
gst_ptp_statistics_callback_remove
<SUBSECTION Standard>