Check if query has scheduling mode set.
Note
When checking if upstream supports pull mode, it is usually not
enough to just check for GST_PAD_MODE_PULL with this function, you
also want to check whether the scheduling flags returned by
gst_query_parse_scheduling() have the seeking flag set (meaning
random access is supported, not only sequential pulls).
Check if query has scheduling mode set. Note When checking if upstream supports pull mode, it is usually not enough to just check for GST_PAD_MODE_PULL with this function, you also want to check whether the scheduling flags returned by gst_query_parse_scheduling() have the seeking flag set (meaning random access is supported, not only sequential pulls).