Improving DVD video playback (1 Viewer)

[NewUser]

No, its because dvd players naturally output TV colorspace. So when it sees 16 from the DVD media it outputs black to the projector.

When its hooked up to a PC it sees 16 and it outputs grey. The projector outputs whatever color the RGB it gets (for component). What we did was "fool" the PC to output black for 16, so your projector puts out black. Bascially a spectrum shift.

However newer TV's are smart nowadays. It knows when you use it as a PC and automatically shifts the color for you. E.g. PC outputs grey. TV knows it's suppose to be black so it outputs black. If you do a shift twice (once with ffdshow and then the TV) you'll get smurfs (blue skin tones LOL)

 

[Valdemar]

In other words dvd players have built-in level correction equivalent to what we did in ffdshow?

 

[NewUser]

No, DVDs are made for DVD players. No need to level correct. Everything is matched up correctly. DVDs are encoded with the TV Colorspace, DVD players expects an input of TV Colospace. And hence outputs correct colors. They don't need to level correct anything.

PC's expects Monitor Colorspace for media, but gets TV colorspace input from DVDs (or anything that was originally made just for tv). PC doesn't know, so all the colors are shifted when it outputs. So we had to make sure, all media the PC gets is in its format of Monitor Colorspace (by expanding inputs 16-235 to 0-255) So it outputs correctly.

Is just that its the same thing but each unit expects a different format. (I guess the original engineers never imagined DVDs and PCs to merge)

 

[Valdemar]

Thanks, I think I got it. I played around with ffdshow settings and it turns out that I can get even better picture by using "luminance level fix" and "full range" under picture properties. Anyone knows what is it for? I googled it but couldn't find a clear description, apparently it serves the same purpose as the manual level correction, however when set I get much more vivid picture that with the level fix suggested earlier.