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<div class="WordSection1">
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am working on a digital preservation policy document, and I wanted to summarize the format migrations that take place by default in EPrints.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am aware of these migrations, derivative files are generated as
<b>access copies</b> for audio and video documents:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Audio documents -> <o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level2 lfo2">
<![if !supportLists]><span style="font-size:10.0pt;font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><u>Audio.ogg</u> <span style="font-size:10.0pt">(<i>Format</i>: Vorbis |
<i>Bitrate</i>: 96K | <i>Sampling Rate</i>:44.1 kH | <i>Container</i>: OGG)<o:p></o:p></span></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level2 lfo2">
<![if !supportLists]><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><u>Audio.mp4</u> <span style="font-size:10.0pt">(<i>Format</i>: AAC (Advanced Audio Codec) |
<i>Bitrate</i>: 96K | <i>Sampling Rate</i>: 44.1 kH | <i>Container</i>: MPEG-4)</span>
<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l2 level1 lfo2"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Video documents -> <o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level2 lfo2">
<![if !supportLists]><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><u>Video.ogg</u> <span style="font-size:10.0pt">(<i>Video Format</i>: Theora |
<i>Audio Format</i>: Vorbis| <i>Video Bitrate</i>: 500 KB/s | <i>Video Size</i>: 640*360 (16:9) |
<i>Video Frame Rate</i>: 10 FPS | <i>Audio Sampling Rate</i>: 44.1 kHz <i>| Audio Bitrate</i>: 500 kb/s |
<i>Container</i>: OGG )</span><o:p></o:p></p>
<p class="MsoListParagraph" style="margin-left:72.0pt;text-indent:-18.0pt;mso-list:l2 level2 lfo2">
<![if !supportLists]><span style="font-family:"Courier New""><span style="mso-list:Ignore">o<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]><u>Video.mp4</u> <span style="font-size:10.0pt">(<i>Video Format</i>: AVC (Advanced Video Codec ) |
<i>Audio Format</i>: AAC (Advanced Audio Codec) <i>| Video Bitrate</i>: 500 KB/s |
<i>Video Size</i>: 640*360 (16:9) | <i>Video Frame Rate</i>: 10 FPS | <i>Audio Sampling Rate</i>: 44.1 kHz |
<i>Audio Bitrate</i>: 500 kb/s | <i>Container</i>: MPEG-4 )</span><o:p></o:p></p>
<p class="MsoNormal" style="text-indent:36.0pt">(see: <a href="https://github.com/eprints/eprints/blob/392474eec1b8125a66ed2d3e12b02aeb67dc07c4/perl_lib/EPrints/Plugin/Convert/Thumbnails.pm">
https://github.com/eprints/eprints/blob/392474eec1b8125a66ed2d3e12b02aeb67dc07c4/perl_lib/EPrints/Plugin/Convert/Thumbnails.pm</a> )<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I am also aware of this:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo3"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>DOC files -> indexcodes.txt (see: <a href="https://github.com/eprints/eprints/blob/392474eec1b8125a66ed2d3e12b02aeb67dc07c4/perl_lib/EPrints/Plugin/Convert/IndexCodes.pm">
https://github.com/eprints/eprints/blob/392474eec1b8125a66ed2d3e12b02aeb67dc07c4/perl_lib/EPrints/Plugin/Convert/IndexCodes.pm</a>)
<o:p></o:p></p>
<p class="MsoNormal">It extracts indexing terms from DOC files and places these in a TEXT file. So this isn’t a migration, but a derivative text file which gets stored. It is similar to the thumbnail “preview.jpg” image for Video and PDF documents:<o:p></o:p></p>
<p class="MsoListParagraph" style="text-indent:-18.0pt;mso-list:l0 level1 lfo3"><![if !supportLists]><span style="font-family:Symbol"><span style="mso-list:Ignore">·<span style="font:7.0pt "Times New Roman"">
</span></span></span><![endif]>Video or PDF file -> <u>preview.jpg</u> <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Are there more migrations/format conversions/normalizations that take place in EPrints by default?<o:p></o:p></p>
<p class="MsoNormal">For example, does EPrints ever convert .DOC files to PDF?, using this:
<a href="https://github.com/eprints/eprints/blob/392474eec1b8125a66ed2d3e12b02aeb67dc07c4/perl_lib/EPrints/Plugin/Convert/DocPDF.pm">
https://github.com/eprints/eprints/blob/392474eec1b8125a66ed2d3e12b02aeb67dc07c4/perl_lib/EPrints/Plugin/Convert/DocPDF.pm</a> ?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Best wishes,<o:p></o:p></p>
<p class="MsoNormal">Tomasz<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span lang="FR-CA"><o:p> </o:p></span></p>
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