[vlc-devel] [PATCH]OpenGL video output colorspace correction

Kaarlo Räihä agent_007 at luukku.com
Sun Jul 6 18:02:48 CEST 2008

Antoine Cellerier kirjoitti 06.07.2008 kello 18:26:
> On Sun, Jul 06, 2008, Kaarlo Räihä wrote:
> > Someone pointed out that OpenGL video output swaps red and blue
> components in nightlies
> >
> http://forum.videolan.org/viewtopic.php?f=14&t=47935&start=0&st=0&sk=t&sd=a
> > I checked with Vista+Nvidia and XP+ATI to make sure it isn't driver or OS
> related issues.
> > 
> > I don't know what has caused this issue (in 0.8.6 it works without this)
> but at least this patch fixes it under Windows. Patch should affect to
> Linux/Unix also (I don't have GUI box to check it out), so please
>  someone
> check if it does break Linux/Unix OpenGL. If it does, you can fix it by
> making sure that Linux/Unix uses
> > 
> > 
> > 
> > Because of GL_BGRA, the output should work little faster under Windows
> but difference is minimal.
> > http://www.gamedev.net/community/forums/topic.asp?topic_id=327540
> Must be somehow linked to:
> https://trac.videolan.org/vlc/ticket/1659
> Could you try changing the chroma mapping in swscale to check? (Change
> it from PIX_FMT_RGB24 to PIX_FMT_BGR24) Or are you using on of the VLC
> internal chroma conversion modules?
> -- 
> Antoine Cellerier
> dionoea
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I don't know which component does the nightlies use for chroma conversion (build using Cygwin and contrib-20080702-win32). Or why it only affects OpenGL output. Can someone tell me how do I check it?

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