POV-Ray : Newsgroups : povray.binaries.animations : no clock gravity : Re: no clock gravity Server Time
17 May 2024 05:11:38 EDT (-0400)
  Re: no clock gravity  
From: Daniel Nilsson
Date: 19 Sep 2009 06:20:43
Message: <4ab4b07b$1@news.povray.org>
alphaQuad wrote:
> The only reason you see and screen cap of the mpg in media player 6 is because
> that program was run after and secondly with respect to MP7.
> 
> The only reason you see a screen cap out of MP7 (on the right) is because its a
> 3ivx! (and mp7 not run secondly)
> 
> Run MPEGs singularly and there is darking of the movie (not with 3ivx) and
> screen cap is blank!
> 
> Go MS, you so ssss.......
> 

The reason for the blank screenshot is that the media player is using 
hardware accelerated playback using a feature called overlays. It's like 
the blue or green screen they use when making special effects in movies 
for example. The window of the media player is in fact not black but 
very very dark red (IIRC), your graphics card is then replacing that 
color with the hardware accelerated video just before it sends it to the 
monitor. Only one program at a time can use this feature so if you start 
multiple players only the first will use it, the other will fall back to 
less hardware accelerating. The difference in darkness is probably due 
to software vs. hardware decoding. There is an option in media player to 
shot off acceleration allowing you to take sceenshots. I found all this 
out years ago when I tried to capture screenshots of a video.

-- 
Daniel Nilsson


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