System information
Markers are aligned with the start of captioning for  paint-on captions or with the display time for pop-up 
style captions.
When the captioning markers are read, Vegas Pro  creates an .SCC file in the media file's folder using the 
same base name  as the media file. The .SCC file is used when you use the media in the  future so the 
application doesn't need to scan the media again.
When you're finished editing your project, you can  promote the embedded captioning markers to the 
timeline:
1.  Select events with captions.
2.  From the Tools menu, choose Scripting, and then  choose Promote Media  Closed Captioning.
The markers appear as command   markers on the timeline, and you can move and edit the markers 
as needed:
Rendering Line 21 captions
Line 21 captions are supported during rendering when  using a frame size of 720x486 pixels (or taller) and a 
frame rate of 29.97  fps.
Please note that encoding line 21 captions   for DVD is not supported. MPEG-2 video for DVD cannot 
exceed 480 lines  of resolution. DVD line 21 captions are embedded as metadata in the MPEG-2  video 
stream and are not supported.
Importing or printing captions when using HD SDI
Importing closed captions over HD SDI
Vegas Pro reads  embedded VANC closed captioning when capturing  video over HD SDI. 
n  During capture, Vegas Pro creates an .SCC file in the media  file's folder using the same base name 
as the captured file.
n  If capturing to XDCAM  HD422 format, closed captions are also embedded in the captured file.
For more information, see "Capturing from an SDI Card" on page 122.
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