• VEGAS Pro

  overlaying a “transparent” clip darkens the underlaying clip

  Posted by Arthur Bueno on July 10, 2006 at 5:07 pm

  I just noticed this after using the Virtual Dub subtitler plugin (through Wax) on a track: the plugin darkens the video.
  The darkening is not noticable in the Vegas Preview window, but you can see it in the external monitor, and after print to tape.

  After some tests I found out that I get the same amount of darkening if I just put a solid color (with alpha set to zero) on the track above my video. So it seems it the problem lies not with the subtitler plugin, but that anything with full transparency darkens the underlying clip.
  It makes no difference if alpha is set to ‘straight’ or ‘premultiplied’.
  Any suggestions on what is going on here, and how to avoid that?

  Doug Graham replied 19 years, 10 months ago 2 Members · 1 Reply
• 1 Reply

• 

  Doug Graham

  July 12, 2006 at 7:44 pm

  Check to make sure that the transparency of both the clip, and the track it’s in, are really set to 100%.

  Regards,
  Doug Graham

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