the storage for the GstFormat of the source value, or NULL. out[allow-none]
the storage for the source value, or NULL. out[allow-none]
the storage for the GstFormat of the destination value, or NULL. out[allow-none]
the storage for the destination value, or NULL. out[allow-none]
Parse a convert query answer. Any of src_format, src_value, dest_format, and dest_value may be NULL, in which case that value is omitted.