<HTML ><HEAD ><TITLE > Stream with VLC </TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.7"><LINK REL="HOME" TITLE="VideoLAN HOWTO" HREF="index.html"><LINK REL="UP" TITLE=" Stream from an acquisition card or a webcam " HREF="softencoding.html"><LINK REL="PREVIOUS" TITLE=" Install the Video for Linux drivers " HREF="x980.html"><LINK REL="NEXT" TITLE=" Stream with VLS " HREF="x1074.html"></HEAD ><BODY CLASS="sect1" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >VideoLAN HOWTO</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="x980.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 8. Stream from an acquisition card or a webcam</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="x1074.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="sect1" ><H1 CLASS="sect1" ><A NAME="AEN988" ></A >8.2. Stream with VLC</H1 ><DIV CLASS="note" ><P ></P ><TABLE CLASS="note" WIDTH="100%" BORDER="0" ><TR ><TD WIDTH="25" ALIGN="CENTER" VALIGN="TOP" ><IMG SRC="../images/note.gif" HSPACE="5" ALT="Note"></TD ><TD ALIGN="LEFT" VALIGN="TOP" ><P > You must add <B CLASS="command" >--enable-v4l</B > to <B CLASS="command" >./configure</B > to use this feature .</P ></TD ></TR ></TABLE ></DIV ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><FONT COLOR="#000000" ><PRE CLASS="screen" > <TT CLASS="prompt" >% </TT ><TT CLASS="userinput" ><B >vlc -vvv v4l:/dev/video:norm=secam:frequency=543250:size=640x480:channel=0:adev=/dev/dsp:audio=0 --sout '#transcode{vcodec=mp4v,acodec=mpga,vb=3000,ab=256,vt=800000,keyint=80,deinterlace}:std{access=udp,mux=ts,url=239.255.12.13}' --ttl 12</B ></TT > </PRE ></FONT ></TD ></TR ></TABLE ><P >where :</P ><P ></P ><UL ><LI ><P ><TT CLASS="filename" >/dev/video</TT > is the device corresponding to your acquisition card or your webcam ,</P ></LI ><LI ><P ><EM >norm=secam</EM > is name of the standard of the analogic signal (possible values are pal, secam, and ntsc) ,</P ></LI ><LI ><P ><EM >frequency=543250</EM > is the frequency of the channel in khz (<EM >Warning :</EM > for VLC < 0.6.1, Frequency is channel frequency in MHz multiplied by 16) ,</P ></LI ><LI ><P > <EM >size=640x480</EM > is the size of the video you want (you can also put the standard size like <EM >subqcif</EM > (128x96), <EM >qsif</EM > (160x120), <EM >qcif</EM > (176x144), <EM >sif</EM > (320x240), <EM >cif</EM > (352x288) or <EM >vga</EM > (640x480)) ,</P ></LI ><LI ><P ><EM >channel=0</EM > is the number of the channel (usually 0 is for tuner, 1 for composite and 2 for svideo) ,</P ></LI ><LI ><P ><EM >adev=/dev/dsp</EM > is the audio device ,</P ></LI ><LI ><P ><EM >audio=1</EM > is the number of the audio channel (usually 0 is for mono and 1 for stereo) ,</P ></LI ><LI ><P ><EM >vcodec=mp4v</EM > is the video format you want to encode in (<EM >mp4v</EM > is MPEG-4, <EM >mpgv</EM > is MPEG-1, and there is also <EM >h263</EM >, <EM >DIV1</EM >, <EM >DIV2</EM >, <EM >DIV3</EM >, <EM >I420</EM >, <EM >I422</EM >, <EM >I444</EM >, <EM >RV24</EM >, <EM >YUY2</EM >),</P ></LI ><LI ><P ><EM >acodec=mpga</EM > is the audio format you want to encode in (<EM >mpga</EM > is MPEG audio layer 2, <EM >a52</EM > is A52 i.e. AC3 sound) ,</P ></LI ><LI ><P ><EM >vb=3000</EM > is the video bitrate in Kbit/s ,</P ></LI ><LI ><P ><EM >ab=256</EM > is the audio bitrate in Kbit/s </P ></LI ><LI ><P ><EM >vt=800000</EM > is the video bitrate tolerance in bit/s ,</P ></LI ><LI ><P ><EM >keyint=80</EM > is the maximum interval between two "I" images in number of images ,</P ></LI ><LI ><P ><EM >deinterlace</EM > tells VLC to deinterlace the video on the fly ,</P ></LI ><LI ><P ><EM >192.168.0.42</EM > is either :</P ><P ></P ><UL ><LI ><P > the IP address of the machine you want to unicast to ;</P ></LI ><LI ><P > or the DNS name the machine you want to unicast to ;</P ></LI ><LI ><P > or a multicast IP address .</P ></LI ></UL ></LI ><LI ><P ><EM >12</EM > is the value of the TTL (Time To Live) of your IP packets (which means that the stream will be able to cross 11 routers) .</P ></LI ></UL ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="x980.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Home</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="x1074.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Install the Video for Linux drivers</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="softencoding.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Stream with VLS</TD ></TR ></TABLE ></DIV ></BODY ></HTML >