Hi,
Can you take a look at:
@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. 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?
So, does softdevice do the RGB-->YUV for the OSD and then alpha-blend that into the video frame?
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.
CR.
On Dienstag 08 August 2006 03:56, CR wrote:
Hi,
Can you take a look at:
@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@xfree86.org/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.
-
CR -
Stefan Lucke