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With VLC, I wish to stream a portion of the desktop and send it to another host on my local area network.

The capture seems to work, I see a correct portion of the desktop into the VLC server, but nothing is send to the network, as Wireshark is empty with the filter ip.src==192.168.1.31 && udp.port==2416:

Capture works well

Server.bat

vlc -vvv screen:// :screen-fps=15 ^
:screen-top=12 :screen-left=4 :screen-width=320 :screen-height=200 ^
:sout=#transcode{acodec=none}:duplicate{dst=std{access=udp{ttl=1},dst=192.168.1.7:2416},dst=display} ^
:sout-keep

Client.bat

vlc udp://:2416

Options in vlcServer.bat and vlcClient.bat are missing and/or wrong, do you known how correct them?

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  • So you say with VLC server and java client you receive something? You could use wireshark to determine if nothing if VLC receives nothing, or if VLC simply "is displaying" nothing...
    – rogerdpack
    Apr 26, 2013 at 17:56
  • I have deployed my test on two computers and used Wireshark, the server doesn't send anything :-(
    – Aubin
    Apr 27, 2013 at 15:03
  • did the java client ever receive anything then?
    – rogerdpack
    Apr 29, 2013 at 16:14

1 Answer 1

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Finally, after a lot of tests, I've discovered I need an encoder for screen source:

vlcServer.bat

@start /MIN "" "C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" ^
-vvv screen:// :screen-fps=25 :screen-top=545 :screen-left=232 :screen-width=250 :screen-height=120 ^
--sout=#transcode{vcodec=h264,acodec=none,fps=25}:rtp{dst=192.168.1.31,port=5004,mux=ts,ttl=1} :sout-keep

vlcClient.bat

@start /MIN "" "C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" rtp://:5004

As you can see, the encoder used is H264 for the video, none for the audio.

And now, I've a performance issue... because the observed frame rate is very, very, low

EDIT

I've just added fps=25. The frame rate is now correct but the latency is about 3 seconds. It's not acceptable for me, because the image streamed is the artificial horizon of a simulated plane cockpit (X-Plane).

enter image description here

EDIT 2

I've just found a wonderfull X-Plane plug-in which fulfill exactly my needs : XHSI. Performances are provided because the information transmitted are not video frames but logical information used to draw images on the target hosts.

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