The VideoLAN Forums

Posted: **18 Apr 2007 17:25**

I'm doing video-only streamign with VLC grabbing from several v4l webcams, transcoding to m4v format, and passing it off to a Darwin Streaming Server.

My startup script:

Code: Select all

#!/bin/bash
clear
# $1 = sdp file name, put in /usr/local/movies
# $2 = ip to broadcast udp to
# $3 = port to broadcast udp to
# $4 = /dev/video?

echo \$1 should be the sdp file name \(foo.sdp\)
echo \$2 should be the IP to send the UDP stream to \(the ip of the DSS box\)
echo \$3 should be the port to broadcast to on the DSS box
echo \$4 should be the /dev/video? V4L device \(/dev/video0\)
echo ""
echo Example: ./StartStream.sh cam1.sdp 127.0.0.1 1234 video1
echo ""
if [ -z $1 ]
then
	echo Missing argument\(s\)
	echo ""
	exit 0
fi

if [ -z $2 ]
then
        echo Missing argument\(s\)
        echo ""
        exit 0
fi

if [ -z $3  ]
then
        echo Missing argument\(s\)
        echo ""
        exit 0
fi           
if [ -z $4  ]
then
        echo Missing argument\(s\)
        echo ""
        exit 0
fi           
echo " "
echo " "

echo Don\'t forget to copy /usr/local/movies/$1 to the /home/darwin/movies 
echo directory on the darwin server
echo " "



OUTPUT=`echo '#transcode{vcodec=mp4v,vb=400}:rtp{dst=DESTIP,port=DESTPORT,sdp=file:///usr/local/movies/SDP}' | sed s/SDP/$1/g | sed s/DESTIP/$2/g | sed s/DESTPORT/$3/g`

echo vlc -I dummy v4l:/dev/$4:size=320x240 --no-audio --sout $OUTPUT

vlc -I dummy v4l:/dev/$4:size=320x240 --no-audio --sout $OUTPUT

and change argumnet #3, the port to send the rtp/udp packets to, when I actually check whats open where with netstat, it always sends video to port 1232, no matter what value I put for arg #3 (I've done 1240, 1250, 2000, 4320 - all same-same).

I change that one part of my script to specify port-video instead of just port, and it goes to the proper port. So it seems to me that VLC is ignoring the port= option (I'm guessing it should use the number provided as a base and create a video port 2 below and an audio port at the number specifiied or something like that) but it does honor the port-video and port-audio options. EDIT - or the online streaming howto docs are wrong and port= just isn't supported... although from what I could understand of the rtp.c source file, it should still understand port= ...

$ vlc --help
VLC media player 0.8.6 Janus

Running on Ubuntu 6.10 (got vlc via apt-get install) , Dell Optiplex GX270

Thanks!

Posted: **25 Apr 2007 19:04**

Hi, I had the same issue, and looking at the --longhelp --advanced option, I realized that the option --sout-rtp-port-video="5000" changes the video port. You should do the same for the audio, with --sout-rtp-port-audio.

I hope this helps....

The VideoLAN Forums

poss. bug w/ rtp output module?

poss. bug w/ rtp output module?