Credit Andrew/Andrea for defing procedure and putting into Latex format

diff --git a/parts/DVD.tex b/parts/DVD.tex
index 5d38c8d822e16203431f997b2c4cc3f53c6f3311..1238927e784e0c3b6ac797d6f43cf84f767717cb 100644 (file)
--- a/parts/DVD.tex
+++ b/parts/DVD.tex
@@ -502,6 +502,48 @@ because the upsampling of interlaced chroma fields is normally done using a prog
 With this mode enabled, the MPEG decoder uses a different algorithm for interlaced frames so that the
 4:2:0 format chroma interlacing is preserved.
 
+\section{DVD with LPCM audio}%
+\label{sec:dvd_lpcm_audio}
+
+By default, the audio when creating a DVD is always \textit{AC3}. However you can switch to \textit{PCM} (Pulse Code Modulator) with just a few additional steps as outlined below.
+Note that Audio must be $48Khz$ or $96Khz$, nothing else is supported, even by ffmpeg's dvd pcm encoder.
+
+\begin{enumerate}
+       \item Start \CGG{} from a terminal window so you will be able to see what is happening. Only the final step when you actually want to write to a
+DVD media writer, requires privileges of either root or the system has
+granted the user this privilege.
+       \item Make sure you have your video with audio loaded and edited to your satisfaction and you are positioned at the start of the video.
+       \item Use the \texttt{File} pulldown and select the \textit{DVD Render} option.
+       \item In the\textit{Create DVD} window, accept the defaults or select different values and then click \texttt{OK}.  Do not check "Use FFMPEG" as that will not work.
+       \item When the \textit{Batch Render} window pops up, in the big box towards the bottom will be 2 lines with the first line for \textit{Video} already highlighted.  Instead, click on the second line, which is for \textit{Audio}, so that it is highlighted.
+       \item On the top left, you will see the \textit{File Format} set as AC3.  Use the down arrow next to    the box and change it to \textit{Raw PCM} by clicking on it.
+       \item When you switch to Raw PCM, you see the extension in the \texttt{Output path} above change to pcm
+       instead of ac3.  Now just reset the extension from pcm to lpcm as       that is required. In most cases if you click on the \texttt{Audio} wrench to see the settings, you will find that the standard settings of 16 bit Linear / Signed / Hi Lo work.  If not, experiment for alternatives.
+       \item Now click on the \texttt{Start} box in the bottom left hand corner and \CGG{}     will process what it can of the job and put you back at your terminal startup window.
+       \item You will see a few lines of output, some of which are shown below, to include the ERROR:
+       \begin{lstlisting}[style=sh]
+               running /dev/shm//dvd_20240116-182336/dvd.sh
+               INFO: [mplex] mplex version 2.1.0 (2.2.7 $Date: 2012/11/17 01:55:16 $)
+               **ERROR: [mplex] Unable to open file
+               /dev/shm/dvd_20240116-182336/dvd.ac3 for reading.
+       \end{lstlisting}
+       \item Change directory to the location as shown on the terminal window of \texttt{dvd.sh}.
+       \item Using an editor, modify the line in dvd.sh to change \texttt{dvd.ac3} to \texttt{dvd.lpcm} and change the mplex parameter to include:
+       \begin{lstlisting}[style=sh]
+               -L  48000:2:16
+       \end{lstlisting}
+       The full line will look like this:
+       \begin{lstlisting}[style=sh]
+               mplex -f 8 -L 48000:2:16 -o $dir/dvd.mpg $dir/dvd.m2v $dir/dvd.lpcm
+       \end{lstlisting}
+       \item Now the script is ready to run in the same manner it would have had it been ac3. That is just run via:
+       \begin{lstlisting}[style=sh]
+               ./dvd.sh
+       \end{lstlisting}
+       \item Check to make sure there are no errors in the output shown on the window and proceed as usual.
+\end{enumerate}
+
+
 \section{MPEG utility programs}%
 \label{sec:mpeg_utility_programs}