On Fri, 2014-06-20 at 09:07 +0200, Hans Verkuil wrote: > Hi Mauro, > > I wonder if you remember anything about the reported broken colorspace handling > of bttv. The spec talks about V4L2_COLORSPACE_BT878 where the Y range is 16-253 > instead of the usual 16-235. > > I downloaded a bt878 datasheet and that mentions the normal 16-235 range. > > I wonder if this was perhaps a bug in older revisions of the bt878. Do you > remember anything about this? I have a Rockwell datasheet for the BrookTree 878/879 that has the Y 16-253 (16 is the pedestal level) and Cr/Cb 2-253 on page 118. I will email to you off list. Regards, Andy > I plan on doing some tests with my bttv cards > next week. > > The main reason I'm interested in this is that I am researching the colorspace > handling in v4l2 (and how it is defined in the spec). That needs to be nailed > down because today nobody really knows how it is supposed to work and it is a > complicated topic. > > Regards, > > Hans > -- > To unsubscribe from this list: send the line "unsubscribe linux-media" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
