mkvxmlmaker -- Makes XML files for mkvmerge

This module provides classes that can create XML files for feeding into mkvmerge.
The two XML files supported are for specifying chapters and tags.

MKVXML_chapter:

	import mkvxmlmaker

	c = mkvxmlmaker.MKVXML_chapter()
	c.AddChapter('00:00:00.000', "Intro")
	c.AddChapter('00:10:00.000', "Act 2")
	c.AddChapter('00:20:00.000', "Act 3")
	c.AddChapter('00:30:00.000', "Credits")

	c.Save('./chapters.xml')

Produces the following XML:

	<?xml version="1.0" ?>
	<!DOCTYPE Chapters
	  SYSTEM 'matroskachapters.dtd'>
	<Chapters>
		<EditionEntry>
			<ChapterAtom>
				<ChapterTrack>
					<ChapterTrackNumber>1</ChapterTrackNumber>
				</ChapterTrack>
				<ChapterTimeStart>00:00:00.000</ChapterTimeStart>
				<ChapterDisplay>
					<ChapterString>Intro</ChapterString>
					<ChapterLanguage>eng</ChapterLanguage>
				</ChapterDisplay>
			</ChapterAtom>
			<ChapterAtom>
				<ChapterTrack>
					<ChapterTrackNumber>2</ChapterTrackNumber>
				</ChapterTrack>
				<ChapterTimeStart>00:10:00.000</ChapterTimeStart>
				<ChapterDisplay>
					<ChapterString>Act 2</ChapterString>
					<ChapterLanguage>eng</ChapterLanguage>
				</ChapterDisplay>
			</ChapterAtom>
			<ChapterAtom>
				<ChapterTrack>
					<ChapterTrackNumber>3</ChapterTrackNumber>
				</ChapterTrack>
				<ChapterTimeStart>00:20:00.000</ChapterTimeStart>
				<ChapterDisplay>
					<ChapterString>Act 3</ChapterString>
					<ChapterLanguage>eng</ChapterLanguage>
				</ChapterDisplay>
			</ChapterAtom>
			<ChapterAtom>
				<ChapterTrack>
					<ChapterTrackNumber>4</ChapterTrackNumber>
				</ChapterTrack>
				<ChapterTimeStart>00:30:00.000</ChapterTimeStart>
				<ChapterDisplay>
					<ChapterString>Credits</ChapterString>
					<ChapterLanguage>eng</ChapterLanguage>
				</ChapterDisplay>
			</ChapterAtom>
		</EditionEntry>
	</Chapters>

MKVXML_tags

	import mkvxmlmaker

	c = mkvxmlmaker.MKVXML_tags()

	t = c.NewTag()
	t.TargetType = 'COLLECTION'
	t.TargetTypeValue = 70
	t['TITLE'] = 'ER'
	t['TOTAL_PARTS'] = 15

	t = c.NewTag()
	t.TargetType = 'SEASON'
	t.TargetTypeValue = 60
	t['TITLE'] = 'Season 1'
	t['PART_NUMBER'] = 1
	t['TOTAL_PARTS'] = 25

	t = c.NewTag()
	t.TargetType = 'EPISODE'
	t.TargetTypeValue = 50
	t['TITLE'] = 'Make of Two Hearts'
	t['PART_NUMBER'] = 16
	t['WRITTEN_BY'] = 'Woodward, Lydia'
	t['DIRECTED_BY'] = 'Leder, Mimi'
	t['DESCRIPTION'] = 'Kayson pursues Lewis romantically. Ross and hathaway cope with a young Russian girl with AIDS whose adoptive mother abandons her. A humane policeman hauls in a dog he hit with his car.'

	c.Save('./tags.xml')

Produces the following XML:

	<?xml version="1.0" ?>
	<!DOCTYPE Tags
	  SYSTEM 'matroskatags.dtd'>
	<Tags>
		<Tag>
			<Targets>
				<TargetType>COLLECTION</TargetType>
				<TargetTypeValue>70</TargetTypeValue>
			</Targets>
			<Simple>
				<Name>TITLE</Name>
				<String>ER</String>
				<TagLanguage>eng</TagLanguage>
			</Simple>
			<Simple>
				<Name>TOTAL_PARTS</Name>
				<String>15</String>
				<TagLanguage>eng</TagLanguage>
			</Simple>
		</Tag>
		<Tag>
			<Targets>
				<TargetType>SEASON</TargetType>
				<TargetTypeValue>60</TargetTypeValue>
			</Targets>
			<Simple>
				<Name>PART_NUMBER</Name>
				<String>1</String>
				<TagLanguage>eng</TagLanguage>
			</Simple>
			<Simple>
				<Name>TITLE</Name>
				<String>Season 1</String>
				<TagLanguage>eng</TagLanguage>
			</Simple>
			<Simple>
				<Name>TOTAL_PARTS</Name>
				<String>25</String>
				<TagLanguage>eng</TagLanguage>
			</Simple>
		</Tag>
		<Tag>
			<Targets>
				<TargetType>EPISODE</TargetType>
				<TargetTypeValue>50</TargetTypeValue>
			</Targets>
			<Simple>
				<Name>DESCRIPTION</Name>
				<String>Kayson pursues Lewis romantically. Ross and hathaway cope with a young Russian girl with AIDS whose adoptive mother abandons her. A humane policeman hauls in a dog he hit with his car.</String>
				<TagLanguage>eng</TagLanguage>
			</Simple>
			<Simple>
				<Name>DIRECTED_BY</Name>
				<String>Leder, Mimi</String>
				<TagLanguage>eng</TagLanguage>
			</Simple>
			<Simple>
				<Name>PART_NUMBER</Name>
				<String>16</String>
				<TagLanguage>eng</TagLanguage>
			</Simple>
			<Simple>
				<Name>TITLE</Name>
				<String>Make of Two Hearts</String>
				<TagLanguage>eng</TagLanguage>
			</Simple>
			<Simple>
				<Name>WRITTEN_BY</Name>
				<String>Woodward, Lydia</String>
				<TagLanguage>eng</TagLanguage>
			</Simple>
		</Tag>
	</Tags>

These can then be used with mkvmerge to inject the data into the Matroska file:

	mkvmerge -o out.mkv --chapters chapters.xml --global-tags tags.xml in.mkv

Some notes:
* Times provided to MKVXML_chapter.AddChapter are in absolute times, not lengths of the chapter
* Tags are applied globally (if --global-tags is used), hence no UIDs are provided
* AddAttachmentUID(), AddChapterUID(), AddEditionUID(), and AddTrackUID() are available to apply a tag to the specific UID

Links:
* https://mkvtoolnix.download/doc/mkvmerge.html
* http://matroska.org/technical/specs/tagging/index.html
* http://www.matroska.org/technical/specs/tagging/example-video.html