[ CCode ( cname = "gst_rtsp_message_get_header" ) ]
public Result get_header (HeaderField field, out unowned string value, int indx)
Get the indx header value with key field from this.
The result in value stays valid as long as it remains present in this.
| this |
a Message |
| field | |
| value |
pointer to hold the result |
| indx |
the index of the header |