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.

class Structure
string fieldname


fieldname string

the name of a field

Return Value

Type: string

a pointer to the string or NULL when the field did not exist or did not contain a string.