LEAD Text Overlay XML File Format

General

The text overlay XML file is a normal XML file following the XML specifications. However, this format defines a set of tags for use in this filter. Any other tags will be ignored. Tag names are case sensitive; for example: use TOverlay and not Toverlay or toverlay. The file must contain a signature comment before any of the text tags; the signature comment must be: <!--LEAD TextOverlay XML File-->.

Valid tags

• The root tag is "TOverlay". This is the main tag. All other tags must be children to this tag. This tag has an attribute named "Text_Scrolling" that can take either "Yes" or "No". This tag can appear only once in the file. For the same file you can have only a scrolling text or a non-scrolling text.
• The text tag is "Text". It is a child tag of the "TOverlay" tag. This is the major tag that will introduce the overlay text. This tag hosts the following tags: Text_Line, Start_Frame, End_Frame, Scrolling_Speed.
• The text line tag is "Text_Line". This is a child tag of the "Text" tag. Use it to set one or more of your overlay text strings. To enter a new line in the text, you can use the \n sequence.
• The start frame tag is "Start_Frame". This is also a child tag of the "Text" tag. Use this to specify the frame in the stream at which the overlay text in the Text_Line tag will first appear.
• The end frame tag is "End_Frame". This is also a child tag of the "Text" tag. Use this to specify the frame in the stream at which the overlay text in the Text_Line tag will disappear.
• The scrolling speed tag is "Scrolling_Speed". This is also a child tag of the "Text" tag. Use this to specify the speed at which the overlay text in the Text_Line tag will scroll. This tag can be used only if the text is specified as scrolling in the TOverlay root tag.

Example 1 (no scrolling)

<?xml version="1.0" ?> 
<!--LEAD TextOverlay XML File--> 
<TOverlay Text_Scrolling = "No"> 
   <Text> 
      LEAD Technologies, Inc.\nAudio/Video capture, playback and editing using Microsoft Media Foundation technologies. 
      <Start_Frame>0</Start_Frame>  
      <End_Frame>300</End_Frame>  
   </Text>    
   <Text> 
      <Text_Line>Includes fully functional video\ncapture and teleconference demos. </Text_Line> 
      <Start_Frame>300</Start_Frame> 
      <End_Frame>600</End_Frame> 
   </Text>    
   <Text> 
      <Text_Line>Support for AVI, MPEG, WAV, MIDI, SND, AIF files and much more.</Text_Line> 
      <Start_Frame>600</Start_Frame> 
      <End_Frame>1000</End_Frame> 
   </Text>    
   <Text> 
      <Text_Line>The quick brown fox jumps over the lazy dog</Text_Line> 
      <Start_Frame>1000</Start_Frame> 
      <End_Frame>2000</End_Frame> 
      </Text> 
   </TOverlay> 

Example 2 (scrolling)

<?xml version="1.0" ?> 
<!--LEAD TextOverlay XML File--> 
<TOverlay Text_Scrolling = "Yes"> 
   <Text> 
      <Text_Line>LEAD Technologies, Inc.\nAudio/Video capture, playback and editing using Microsoft Media Foundation technologies.</Text_Line> 
      <Scrolling_Speed>1</Scrolling_Speed> 
   </Text>    
   <Text> 
      <Text_Line>Includes fully functional video\ncapture and teleconference demos. </Text_Line> 
      <Scrolling_Speed>2</Scrolling_Speed> 
   </Text>    
   <Text> 
      <Text_Line>Support for AVI, MPEG, WAV, MIDI, SND, AIF files and much more.</Text_Line> 
      <Scrolling_Speed>15</Scrolling_Speed> 
   </Text>    
   <Text> 
      <Text_Line>The quick brown fox jumps over the lazy dog</Text_Line> 
      <Scrolling_Speed>5</Scrolling_Speed> 
   </Text> 
</TOverlay>