field did not exist or did not contain a string.
Structure.getString
string getString(string fieldname)Finds the field corresponding to fieldname, and returns the string contained in the field's value. Caller is responsible for making sure the field exists and has the correct type.
The string should not be modified, and remains valid until the next call to a gst_structure_*() function with the given structure.
Parameters
fieldname | the name of a field |
Returns
a pointer to the string or null when the