Re: [xine-user] PAL DVD playback

[Michael R. <mr...@us...>]

Hi Marcel,

> > The most correct would be to transfer the colours from the source
> > colourspace to some device-independent colourspace and then to the
> > display colourspace, taking the definitions of the primaries, whitepoint
> > and transfer functions into account.
>
> Actually these colour points and transfer functions should be measured
> right of the screen itself I think to get it perfect.

Possibly, but the problem with screens is that the transfer function might 
change according to temperature, average image brightness, recipient's 
POV, ...

> I'm working on calibrating my CRT projector.
> The actual calibration is not all that difficult to me, but I need to
> borrow some equipment from work (I'm working with optical measurement
> equipment a lot and write the software for these systems).

So you have already experience with colour calibration? Nice. Could come in 
handy one day. ;)

> I can imagine that this is a the very low level priority for xine, so I
> will see if I can find the time to sort out what needs to happen to get
> this done in xine. Perhaps I can best start to experiment with a
> post-plugin filter to see whether it really is interesting to build these
> things into xine.

It is low priority right now, but for the future, I think these things might 
be important to get xine-lib into the professional market one day.
So if you have the time and mood to look into this, I would certainly be 
looking forward to calling xine the first colour-proof video player. :)

Michael

-- 
"Beware of bugs in the above code; I have only proved it correct, not
 tried it."
	-Donald E. Knuth