On Dienstag 08 August 2006 03:56, CR wrote: > Hi, > > > > > Can you take a look at: > > > > > > > > http://www.flickr.com/photos/16371732@N00 > > > > @CR, I've seen this but I don't know whats the problem with your setup or > > why our osd drawing is wrong in combination with nvidia cards. > > At which color depth is your X server running ? > > Stefan, I am running at "24 bpp", 800x600. Is this 24 bpp with 3 bytes or 24 bpp with 4 bytes ? Output of xdpyinfo will clear this. > Can you shed some light on how > softdevice does it's alpha blending? I assume the decoded video frame is > in non-RGB color space and from what I read about VDR's OSD that is in > RGB, right? Yes. Video is in fourcc YV12 and vdr OSD is RGB via lookup table. > > So, does softdevice do the RGB-->YUV for the OSD and then alpha-blend that > into the video frame? Yes. And that way, mixing an OSD converted to YV12 color space with YV12 video (OSD drawing set to software) works with Matrox, Radeon and VIA-Unichrome with "-vo xv:". In case of Radeon (mentioned as my current setup) our OSD mixing method works with "-vo vidix:" too. So its either a choice of software or hardware :-( . software: use vdr-xine or xinelibout, hardware: use cards that work: matrox, radeon, Unichrome or savage (with a small change which is a work-around of a driver bug: http://www.mail-archive.com/devel@xxxxxxxxxxx/msg06044.html ) > > Supposedly using Cairo/XRender, alpha-blending can be done by the video > card hardware, I wonder how hard it would be to modify softdevice for > this. > -- Stefan Lucke
