<HTML ><HEAD ><TITLE > Stream a file with VLS </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 a file " HREF="file.html"><LINK REL="PREVIOUS" TITLE=" Stream a file with VLC " HREF="x621.html"><LINK REL="NEXT" TITLE=" Stream a DVD " HREF="dvd.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="x621.html" ACCESSKEY="P" >Prev</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" >Chapter 4. Stream a file</TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="dvd.html" ACCESSKEY="N" >Next</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><DIV CLASS="sect1" ><H1 CLASS="sect1" ><A NAME="AEN646" ></A >4.2. Stream a file with VLS</H1 ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><FONT COLOR="#000000" ><PRE CLASS="screen" > <TT CLASS="prompt" >% </TT ><TT CLASS="userinput" ><B >vls -vv -d udp:192.168.0.42 file:video1.xyz --ttl 12</B ></TT > </PRE ></FONT ></TD ></TR ></TABLE ><P >where :</P ><P ></P ><UL ><LI ><P ><TT CLASS="filename" >video1.xyz</TT > is the file you want to stream ,</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 ><P > When you want to stop VLS, use the key combination <B CLASS="keycap" >Ctrl</B >-<B CLASS="keycap" >c</B >.</P ><P > If you want to stream the file continuously, add the <EM >--loop</EM > option .</P ><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 > VLS can stream MPEG files that meet two critera :</P ><P ></P ><UL ><LI ><P > the file must be MPEG <EM >PS</EM > (Program Stream) or MPEG <EM >TS</EM > (Transport Stream), that contain video and audio multiplexed. VLS cannot stream MPEG <EM >ES</EM > (Elementary Stream), i.e. a file with only audio or video .</P ><P > In order to know if an MPEG file is MPEG <EM >PS</EM >, MPEG <EM >TS</EM > or MPEG <EM >ES</EM >, read the file with VLC and look at the messages (select in the menu <EM >View / Messages</EM >, or use the command line <B CLASS="command" >vlc -vvv</B >) .</P ><P ></P ><UL ><LI ><P > If you see a line :</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><FONT COLOR="#000000" ><PRE CLASS="programlisting" > [00000107] main module debug: using demux module "ts_dvbpsi" </PRE ></FONT ></TD ></TR ></TABLE ><P > it means the file is MPEG TS .</P ></LI ><LI ><P > If you see a line :</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><FONT COLOR="#000000" ><PRE CLASS="programlisting" > [00000109] main module debug: using demux module "ps" </PRE ></FONT ></TD ></TR ></TABLE ><P > it means the file is MPEG PS .</P ></LI ><LI ><P > If you see a line :</P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" WIDTH="100%" ><TR ><TD ><FONT COLOR="#000000" ><PRE CLASS="programlisting" > [00000109] main module debug: using demux module "es" </PRE ></FONT ></TD ></TR ></TABLE ><P > it means the file is MPEG ES, VLS can't stream it. .</P ></LI ></UL ></LI ><LI ><P > the sequence header of the video must repeat itself regularly, which is often the case with MPEG-2, but very rare with MPEG-1. There is no easy way to know if the sequence header is repeated regularly. Files with a <EM >.vob</EM > extension are normally MPEG-2 files and files with <EM >.mpg</EM > or <EM >.mpeg</EM > extension or usually MPEG-1 files .</P ></LI ></UL ><P > You can download this streamable MPEG-2 PS file for your tests : <A HREF="ftp://ftp.videolan.org/pub/videolan/streams/presentation/presentation_short.vob" TARGET="_top" >presentation_short.vob</A > .</P ></TD ></TR ></TABLE ></DIV ></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="x621.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="dvd.html" ACCESSKEY="N" >Next</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >Stream a file with VLC</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="file.html" ACCESSKEY="U" >Up</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >Stream a DVD</TD ></TR ></TABLE ></DIV ></BODY ></HTML >