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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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>Chapter 1. Examples</H1
><DIV
CLASS="SECT1"
><H1
CLASS="SECT1"
><A
NAME="EX-TOOLS"
>1.1. Running the tools</A
></H1
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN7"
>1.1.1. Creating the DVD filesystem with dvdauthor</A
></H2
><P
>In these examples, <B
CLASS="COMMAND"
>dvdauthor</B
> is run as:</P
><PRE
CLASS="PROGRAMLISTING"
>rm -r test && dvdauthor -o test -x dvdauthor.xml</PRE
><P
>It will create or append to the directory specified, so it is a
good idea to remove the directory before running
<B
CLASS="COMMAND"
>dvdauthor</B
>, otherwise the resulting structure will
not be playable.</P
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN14"
>1.1.2. Adding subtitles with spumux</A
></H2
><P
><B
CLASS="COMMAND"
>spumux</B
> takes an mpeg2 program stream as input and spits one back out, with subtitles multiplexed in. It is run as:</P
><PRE
CLASS="PROGRAMLISTING"
>spumux spumux.xml < input.mpg > output.mpg</PRE
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN19"
>1.1.3. Creating a movie source from video and audio with mplex</A
></H2
><P
><B
CLASS="COMMAND"
>mplex</B
> comes from the mjpegtools package,
available at http://mjpeg.sourceforge.net. It can take independent
video and audio streams and create a single mpeg2 stream.</P
><PRE
CLASS="PROGRAMLISTING"
>mplex -f 8 -o output.mpg video.m2v audio.m2a</PRE
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN24"
>1.1.4. Creating video from bitmap images with mpeg2enc</A
></H2
><P
>When creating menus, it is necessary to create an mpeg2 video stream from one or more bitmap images. For NTSC you can do:</P
><PRE
CLASS="PROGRAMLISTING"
>ppmtoy4m | mpeg2enc -a 2 -n n -f 8 -o output.m2v</PRE
><P
>and for PAL you can do:</P
><PRE
CLASS="PROGRAMLISTING"
>ppmtoy4m | mpeg2enc -a 2 -n p -f 8 -o output.m2v</PRE
></DIV
><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN30"
>1.1.5. Creating a blank audio track with toolame</A
></H2
><P
>When creating menus with no sound, it is necessary to multiplex
in an empty sound file. At 48kHz, NTSC has 1601.6 audio samples per
frame while PAL has 1920 audio samples per frame. Determine how many
samples you need, and run:</P
><PRE
CLASS="PROGRAMLISTING"
>dd if=/dev/zero bs=4 count=<TT
CLASS="REPLACEABLE"
><I
>number-of-samples</I
></TT
> | toolame -b 128 -s 48 /dev/stdin output.m2a</PRE
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