Sets the integers pointed to by @value_numerator and @value_denominator
corresponding to the value of the given field. Caller is responsible
for making sure the field exists and has the correct type.
%TRUE if the values could be set correctly. If there was no field
with @fieldname or the existing field did not contain a GstFraction, this
function returns %FALSE.
Sets the integers pointed to by @value_numerator and @value_denominator corresponding to the value of the given field. Caller is responsible for making sure the field exists and has the correct type.