audio epubs

[Peter Fleck <peterfleck@gmail.com>]

Hi all.

I might be stretching a bit far here but worth trying.

Is it possible to do a lot of the work to make audio epubs using 
stylesheets?

First, how to auto generate ids for each <para>? I'm sure that is 
straightforward. (Or if more granularity is needed then id's at the 
sentence or word level as needed).

Second, populate the smil file with the ids

<smil xmlns="http://www.w3.org/ns/SMIL"; 
xmlns:epub="http://www.idpf.org/2007/ops"; version="3.0">
    <body>
        <seq id="id1" epub:textref="index.xhtml" epub:type="bodymatter 
chapter">
            <par id="paragraph1">
                <text src="index.xhtml#para-id1"/>
                <audio src="audio/file.mp3" clipBegin="0:00:02.000" 
clipEnd="0:00:15.000"/>
            </par>
            <par id="paragraph2">
                <text src="index.xhtml#para-id2"/>
                <audio src="audio/file.mp3" clipBegin="0:00:15.000" 
clipEnd="0:00:25.000"/>
            </par>
            ....
        </seq>
    </body>
</smil>

The smil file would need manually editing for the clipBegin and clipEnd 
for each but that's fine. The audio src could be passed as a parameter.
Then add something like .-epub-media-overlay-active {background-color: 
#abc;} to the css.

Finally modify the package.opf to add

    <meta property="media:duration" 
refines="#chapter1_overlay">0:04:30.000</meta>
    <meta property="media:duration" 
refines="#chapter2_overlay">0:03:30.000</meta>
    ....
    <meta property="media:duration">0:08:00.000</meta>
    <meta property="media:narrator">Narrator Name</meta>
    <meta property="media:active-class">-epub-media-overlay-active</meta>
  </metadata>
  <manifest>
    <item id="ncx" href="toc.ncx" media-type="application/x-dtbncx+xml"/>
    <item id="htmltoc" properties="nav" 
media-type="application/xhtml+xml" href="ar01-toc.xhtml"/>
    <item media-type="text/css" id="docbook-css" href="docbook-epub.css"/>
    <item id="id-idm21776" href="index.xhtml" 
media-type="application/xhtml+xml" media-overlay="chapter1_overlay"/>
    <item id="chapter1_overlay" href="chapter1_overlay.smil" 
media-type="application/smil+xml"/>
    ....

Is something like this doable?

Peter