[vlc] can't forward a H264 UDP stream

[Gun Akkor]

Hi all,

I have a linux machine which acts as a video stream 
dispatcher between a server and multiple clients on a 
local LAN. The dispatcher machine has one interface 
connected to the server subnet, and another interface 
connected to the local LAN subnet where the clients are 
located.

The server encodes the video stream using x264, and sends 
it as a MPEG TS stream over a UDP connection to the 
dispatcher at a given IP address and port number that is 
known to the server. The VLC instance running on the 
dispatcher listens to this port, and forwards the stream 
as another MPEG TS stream over a UDP connection to the 
client machine, while simultaneously saving it to a file; 
using something similar to the following command line:

vlc -vvv udp://@:1234 --sout 
'#duplicate{dst=std{access=file, mux=mp4, url=test.mp4}, 
dst={access=udp, mux=ts, url=1.2.3.4:8080}}'

For all I can say, the dispatcher receives the stream at 
port 1234 (looking at the vlc debug output and 
wireshark/ethereal trace), saves it to the file (file 
output can be displayed on screen correctly by VLC), and 
sends the stream to the new destination 1.2.3.4:8080 
(again, the packets can be traced by wireshark.

However, the client VLC instance never can acquire the 
stream. It's debug output continuously diplays

[00000332] packetizer_h264 packetizer warning: waiting for 
SPS

This problem is similar to the one reported by Kim Schulz 
earlier, but I haven't seen an answer. I apologize if I 
missed the post.

Does anybody tell me where I am going wrong? In general, 
how is it possible to forward streams via VLC in this 
manner? For example, receive unicast and forward the same 
stream multicast on local LAN...

Thanks in advance

GA

-- 
This is the vlc mailing-list, see http://www.videolan.org/vlc/
To unsubscribe, please read http://www.videolan.org/support/lists.html