Overdrive MediaMarkers id3 extraction

[cgraham149]

I have several audiobooks each having an 'Overdrive MediaMarkers' id3 field in the audio file that look something like this:

part01.mp3
<Markers>
    <Marker>
        <Name>Chapter 1</Name>
        <Time>0:00.000</Time>
    </Marker>
    <Marker>
        <Name>Chapter 2</Name>
        <Time>26:43.000</Time>
    </Marker>
</Markers>
---
part02.mp3
<Markers>
    <Marker>
        <Name>Chapter 3</Name>
        <Time>0:00.000</Time>
    </Marker>
    <Marker>
        <Name>Chapter 4</Name>
        <Time>14:04.000</Time>
    </Marker>
</Markers>
---
part03.mp3
<Markers>
    <Marker>
        <Name>Chapter 5</Name>
        <Time>0:00.000</Time>
    </Marker>
</Markers>
---

The Overdrive MediaMarkers id3 assumes that there are separate files and not one large file. Is there a way to extract the markers and adjust the Time for one large file?

This is my Folder structure:

temp
|-- backup
|-- delete
|-- fix
|-- merge
|-- recentlyadded
|   `-- audiobook01
|       |-- part-04.mp3
|       |-- part-05.mp3
|       `-- part-06.mp3
`-- untagged
    `-- audiobook01
        |-- audiobook01.chapters.txt
        `-- audiobook01.m4b

[simon-techkid]

I wrote the following that does (I think) what you describe.

Program.cs