In case the local UDP port is blocked by a firewall by default, send an initial timing packet so the connection tracking will accept the response packages.
Otherwise, the connection will fail with an 'RTSP/1.0 500 Internal Server Error' after some timeout.
faac387ce raop: Send initial timing packet to prime UDP connection tracking
src/modules/raop/raop-client.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)