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>&#13;What is the VideoLAN project ?
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></A
>1.1. What is the VideoLAN project ?</H1
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="AEN34"
></A
>1.1.1. Overview</H2
><P
>VideoLAN is a complete software solution for video streaming, developed
by students of the <A
HREF="http://www.ecp.fr"
TARGET="_top"
>Ecole Centrale
Paris</A
> and developers from all over the world, under the
<A
HREF="http://www.gnu.org/copyleft/gpl.html"
TARGET="_top"
>GNU General Public
License</A
> (GPL). VideoLAN is designed to stream MPEG videos on high
bandwidth networks.</P
><P
>The VideoLAN solution includes :</P
><P
></P
><UL
><LI
><P
>VLS (VideoLAN Server), which can stream MPEG-1, MPEG-2
and MPEG-4 files, DVDs, digital satellite channels, digital terrestial
television channels and live videos on the network in unicast or
multicast,</P
></LI
><LI
><P
>VLC (initially VideoLAN Client), which can be used as
a server to stream MPEG-1, MPEG-2 and MPEG-4 files, DVDs and live
videos on the network in unicast or multicast ; or used as a client
to receive, decode and display MPEG streams under multiple operating
systems.</P
></LI
></UL
><P
>Here is an illustration of the complete VideoLAN solution :</P
><DIV
CLASS="figure"
><A
NAME="AEN46"
></A
><P
><B
>Figure 1-1.
Global VideoLAN solution
La solution VideoLAN globale
</B
></P
><DIV
CLASS="mediaobject"
><P
><IMG
SRC="images/global-diagram.jpg"></P
></DIV
></DIV
><P
>More details about the project can be found on the <A
HREF="http://www.videolan.org/"
TARGET="_top"
>VideoLAN Web site</A
>.</P
></DIV
><DIV
CLASS="sect2"
><H2
CLASS="sect2"
><A
NAME="AEN53"
></A
>1.1.2. VideoLAN software</H2
><DIV
CLASS="simplesect"
><H3
CLASS="simplesect"
><A
NAME="AEN55"
></A
>1.1.2.1. VLC</H3
><P
>VLC works on many platforms : Linux, Windows, Mac OS X, BeOS,
*BSD, Solaris, Familiar Linux, Yopy/Linupy and QNX. It can read :</P
><P
></P
><UL
><LI
><P
>MPEG-1, MPEG-2 and MPEG-4 / DivX files from a hard disk,
a CD-ROM drive, ...</P
></LI
><LI
><P
>DVDs and VCDs,</P
></LI
><LI
><P
>from a satellite card (DVB-S),</P
></LI
><LI
><P
>MPEG-1, MPEG-2 and MPEG-4 streams from the
network sent by VLS or VLC's stream output.</P
></LI
></UL
><P
>&#13;VLC can also be used as a server to stream :
</P
><P
></P
><UL
><LI
><P
>MPEG-1, MPEG-2 and MPEG-4 / DivX files,</P
></LI
><LI
><P
>DVDs,</P
></LI
><LI
><P
>from an MPEG encoding card,</P
></LI
></UL
><P
>&#13; to :
</P
><P
></P
><UL
><LI
><P
>one machine (i.e. to one IP address) : this is called
<EM
>unicast</EM
>,</P
></LI
><LI
><P
>a dynamic group of machines that the clients can
join or leave (i.e. to a multicast IP address) : this is called
<EM
>multicast</EM
>,</P
></LI
></UL
><P
>in IPv4 or IPv6
.</P
><P
>To get the complete list of VLC's possibilities
on each plateform supported, see the <A
HREF="http://www.videolan.org/vlc/features.html"
TARGET="_top"
>VLC features
page</A
>.</P
><DIV
CLASS="note"
><P
></P
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><P
>&#13;VLC doesn't work on Mac OS 9, and will
probably never do.
</P
></TD
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><DIV
CLASS="simplesect"
><H3
CLASS="simplesect"
><A
NAME="AEN88"
></A
>1.1.2.2. VLS</H3
><P
>&#13; VLS can stream :
</P
><P
></P
><UL
><LI
><P
>&#13;an MPEG-1, MPEG-2 or MPEG-4 files stored on a hard drive
or on a CD,
</P
></LI
><LI
><P
>&#13;a DVD located in a local DVD drive or copied on a hard
disk,
</P
></LI
><LI
><P
>&#13;a satellite card (DVB-S) or a digital terrestial
television card (DVB-T)
,</P
></LI
><LI
><P
>&#13;an MPEG encoding card
;</P
></LI
></UL
><P
>to:</P
><P
></P
><UL
><LI
><P
>one machine (i.e. to one IP address) : this is called
<EM
>unicast</EM
>,</P
></LI
><LI
><P
>a dynamic group of machines that the clients can
join or leave (i.e. to a multicast IP address) : this is called
<EM
>multicast</EM
>,</P
></LI
></UL
><P
>in IPv4 or IPv6
.</P
><P
>A Pentium 100 MHz with 32 MB of memory should be enough to send one
stream on the network. When streaming a lot of videos stored on a
hard drive, the actual limitation is not the processor but the hard
drive and the network connection.</P
><P
>VLS works under Linux and Windows. To get the complete
list of VLS's possibilities on each plateform supported, see the <A
HREF="http://www.videolan.org/streaming/features.html"
TARGET="_top"
>streaming features
page</A
>.</P
></DIV
><DIV
CLASS="simplesect"
><H3
CLASS="simplesect"
><A
NAME="AEN112"
></A
>1.1.2.3. Mini-SAP-server</H3
><P
>&#13;You can add a channel information service based on the SAP/SDP
standard to the VideoLAN solution. The mini-SAP-server sends announces
about the multicast programs on the network in IPv4 or IPv6, and VLCs
receive these annouces and automatically add the programs announced to
their playlist.
</P
><P
>&#13;The mini-SAP-server works under Linux and Mac OS X.
</P
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