The VideoLAN Forums

Hello,

I am french, then excuse for ma bad english.
I am Stéphane Pachis, i am working at a french university.
We would like to stream for all the world a meeting.
The bandwith is not a problem (we have a connexion named RENATER who is very high).

Then, to test VLC, i installed on my computer ( win XP pro SP2) the software.
I tried to encode a video from my webcam but it was impossible to see the vidéo in a player.
Here is what i configure :
1 - open VLC media player
2 - check streaming wizard
3 - check stream to network
4 - choose my stream ( directshow : webcam )
5 - in the link "select a stream", i have : dshow://
6 : streaming method : i choose "http" and i put my ip "http://*.*.*.*:8080"(i have apache as web server)
7 : choose MPEG TS as Encapsulation format
8 : choose 1 as TTL

After all this feature, i have nothing on my ip.

Could you help me to understand what i have to do to have the vidéo of my webcam on my player.

Thanks for your help.

Stéphane
ps : i have msn messenger, if you could help me in IRL : coachs@hotmail.com

Nobody can help me ?

Hello,

For webcam, you absolutely need to transcode, which the wizard does not allow (yet?). You should use the "normal" GUI, which is fairly documented in our "streaming howto"

Thanks for your anwser ...

i have found how transcode the stream.
Is it possible to play the stream in IE for exemple (with a wmp player).

I tried to do it but nothing arrive in the windows, but it works with the vlc player.

Thanks for your help.

Stéphane

WMP is pretty picky on what it wants and what works with it.

Try something like this:

sout=#transcode{vcodec=WMV2,vb=512,scale=1,acodec=mp3,ab=64,channels=2}:duplicate{dst=std{access=mmsh,mux=asfh,url=10.203.71.90:80}}

Then in WMP use "mms://10.203.71.90:80".

The only problem is that this is a unicast stream and if you have several clients connected, your streaming computer will slow down and eventually crash. If you unicast, you'll need a "lot" of computers and bandwidth to host your intended audience.

Hi there, i live streamed a surgical operation (3 Cams in 3 Streams) over our network some weeks ago without any problems, but i did not use the http streaming but a udp multicast and finally all worked well.

:sout=#transcode{vcodec=mp4v,vb=3072,scale=1,acodec=mpga,ab=192,channels=2}:duplicate{dst=std{aacess=udp,mux=ts,url=239.255.255.1:1234}} :ttl=3

Be careful to use the :ttl option, once i forgot it and all network hardware went down, i think because of some packets going pingpong from router to router.

For the 2 other streams i used multicast ip 239.255.255.2 and ~.3, on the receiving clients i used several instances of vlc to receive the stream without any problems.

in our 100mb-Lan this generated a load of about 7% according to taskman, but apart from the video i had a seperate audio stream running back to the encoding machines to have a communication channel to the ones doing the surgery.


Dirk

Just a note - it's much better to use RTP with IP multicast, since RTP is able to correctly handle standard network events like packet reordering/duplication etc.

You just need to specify access=rtp instead of access=udp