iTunes Duration

podcast.xsl

                    <itunes:duration>
                        <xsl:analyze-string select="audio-duration" regex="^(\d+):(\d+):(\d+):(\d+)$">
                            <xsl:matching-substring>

                              <!-- Split into components -->
                              <xsl:variable name="hours"
                                            select="xs:integer(regex-group(1))"/>
                              <xsl:variable name="minutes"
                                            select="xs:integer(regex-group(2))"/>
                              <xsl:variable name="seconds"
                                            select="xs:integer(regex-group(3))"/>

                              <!-- Recombine components -->
                              <xsl:value-of select="$hours"/>
                              <xsl:text>:</xsl:text>
                              <xsl:value-of select="$minutes"/>
                              <xsl:text>:</xsl:text>
                              <xsl:value-of select="$seconds"/>

                            </xsl:matching-substring>
                        </xsl:analyze-string>
                    </itunes:duration>