Thank you for the information, Haihao. I have filed this feature request in bugzilla.
https://bugs.freedesktop.org/show_bug.cgi?id=99193 Jon -----Original Message----- From: Xiang, Haihao Sent: Friday, December 23, 2016 12:55 AM To: Recker, Jon <jon.rec...@intel.com>; libva@lists.freedesktop.org Subject: Re: [Libva] Filling background pixels with YUV values Hi Jon, VA-API doesn't support YUV background color. If you want to have this feature, I suggest you file a bug with severity set to enhancement in the bugzilla to track your requirement. We may consider to add this new feature in a future version. Thanks Haihao > Hello. > > When composing several sources into a single output surface, we can > specify the color of the background pixels using > VAProcPipelineParameterBuffer::output_background_color. According to > the documentation, this background color must be a 32-bit ARGB value. > > But when the output is a non-RGB format (for example, NV12) it would > be helpful if we could set the background color to a constant YUV > value instead. Does libva provide any method to do this? > > I have tried converting the desired YUV background color to RGB, then > setting output_background_color to this RGB value. When the final > picture is processed, the background color is converted back to YUV > automatically. But the final background color does not necessarily > match the requested value, for example when one of the RGB channels is > clipped to fit in the range [0,255]. > > A workaround would be to create a separate full-size NV12 surface and > fill it with the desired background color, but for performance reasons > it is preferable to avoid this. Any suggestions would be very much > appreciated. Thanks. > > Jon > > _______________________________________________ > Libva mailing list > Libva@lists.freedesktop.org<mailto:Libva@lists.freedesktop.org> > https://lists.freedesktop.org/mailman/listinfo/libva
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