The VideoLAN Forums

Hi, I'm trying to duplicate a stream into 2 outputs.

vlc -vvv C:\Movie.wmv --sout "#duplicate{dst=display,
dst=transcode{vcodec=h264,vb=500,scale=1,acodec=mp4a,ab=32,channels=2}:rtp{mux=ts,dst=127.0.0.1:1234,sdp=C:\vlc.sdp}}

That just doesn't work.. any idea why ? The "dst=display" is done, not the second dst..

main error: invalid chain
stream_out_transcode error: cannot create chain

up

apparently VLC can't make two simultaneous (and different) transcodings of an input stream, though it is said to be possible in VLC's doc

What do you want to do? Transcode to h264 and mp4a and then stream via rtp and display the output?

Try e.g.: Arite.

Hi, thanks for your reply,

Actually I would like to transcode differently the two streams with one command : the goal is to save some webcam stream with a good quality in a file, and in a cheap quality in live streaming. So I would have to do something like this :
--sout "#duplicate{dst=transcode{etc}:standard{access=file,url="..."}, dst=transcode{etc2}:rtp{dst=servername,sdp=file:/...}}"

But no matter what, vlc can't seem to understand the dst=transcode

However it figures on the VLC tutorial http://www.videolan.org/doc/streaming-h ... /ch04.html

% vlc -vvv input_stream --sout '#duplicate{dst=
rtp{mux=ts,dst=239.255.1.2,sap,name="OriginalStream"},
dst="transcode{vcodec=mp4v,acodec=mpga,vb=800,ab=128}:
rtp{mux=ts,dst=239.255.1.3,sap,name="TranscodedStream"}"}'

Interesting - the Streaming Howto suggests that one can nest the transcode module within the duplicate module. The commandline I used was: However VLC returns: It could still be a syntax problem, or perhaps the current versions of VLC don't support the sout string described in the Streaming Howto.

Arite.

hmm so if the transcode module can't be nested in the duplicate module, I would have to duplicate the stream into two files/stream, and then open those two files/streams with vlc and transcode them the way I want ? that seems to a very dirty solution :s

Hello all,

Francoyy, did you find a solution of this problem?
I would like to have 2 different streams from 1 webcam using vlc...

Thank you