NOTES

http://developer.apple.com/mac/library/documentation/AppleApplications/Reference/FinalCutPro_XML/Topics/Topics.html
http://developer.apple.com/mac/library/documentation/AppleApplications/Reference/FinalCutPro_XML/Topics/Topics.html#//apple_ref/doc/uid/TP30001149-CH294-SW1
http://documentation.apple.com/en/finalcutpro/usermanual/index.html#chapter=97%26section=3%26tasks=true

py obj
-------------
files()
clipitems()
	->files
	   'tracks' (audio, video)
	in,out (source points)
	start,end (destination point)
          -1 value seems to indicate 'copy from in/out points of clip'

        note: <marker>s also have a '-1' in <out> which just means it's a single point
transitionitem()

sequence/timecode/string seems to be the baseline timecode for t=0

          
xml layout
-------------
xmeml
 sequence[id=]
    uuid, updatebehavior, duration, rate
    timecode
	rate, string, frame, source, displayformat
    in, out
    media
      video
        format
	track
	  transitionitem
	     rate, start, end, alignment, effect
	  clipitem[id=]
	     name, duration, rate, in, out, start, end,
	     pixelaspectratio, enabled, alphatype, masterclipid
	     logginginfo
	     labels
	     comments
	        mastercomment1, mastercomment2, ...
	     file
	        name, pathurl, rate/*, duration
		timecode
		   rate,string,frame,displayformat, source, reel
		media
		   video
			duration,samplecharacteristics(height,width)
		   audio
			samplerate, depth
			channelcount
		filter
		   *****
		sourcetrack
		fielddominance
		itemhistory
		   uuid
	   /clipitem
	/video   
	audio
	   format
	      samplecharacteristics
	         depth, samplerate
           outputs
	      group
	         index, numchannels, downmix, 
		 channel
		 channel
		 ...
	   in, out
	   track
	      transitionitem
	         rate
		    ntsc, timebase
		 start, end, alignment
		 effect
		    ****
	      clipitem[id=]
	          name, duration, rate, in, out, start, end, 
		  masterclipid	      
		  logginginfo/*
		  labels, comments
		  file[id=]
		  filter*
		  sourcetrack
		  link*
		  itemhistory/uuid
	      /clipitem
	      ...
	      enabled, locked, outputchannelindex
	  /track
	  filter
	      effect
      /audio
   /media
   ismasterclip
   marker
/sequence