Hi Wykat,
you have already sorted the inputs of the "piano" qualitywise.
1)
DVI is the best solution because it uses digital signals. Normally the picture should be clear and crisp. If you have some problems with this you should eliminate all possible troublemakers like long wires, to high frame rate, interlaced source. I don't know but is this also wrong if you play a dvd?
All i know from projectors is that still picture looks good while moving pictures can looking worse because of some limits of the lcd.
Another problem is the scaling of lower or higher resolutions than the physical resolution of the lcd. That looks mostly worse. That's what i wanted to say in my first posting. I know my english is not as good as yours.....
Ah yes, no, DVI can have more than one resolution but is limited in bandwidth and physical resolution of the lcd. The resolution limit for one channel DVI is 1280x1024. Maybe different settings for Graka and projector?
Hmm, i have not found any lengthlimit. There should be one.
2)
a)
I have also heard about that it should be possible on some rare Graka to do so but on all others you have to build your own adapter with sync on green.
b)
may be the sync is inverted (wrong polarity) or not on the right wire. YCbCr is Componentsignal. Not as popular as Y/C in germany for normal people. If you have read the link in my previous posting you have also found som links to converters for translating rgb2YCbCr and vice versa.
Has the "piano" RGB or YCbCr inputs? this is a big difference.
3)
a) not a good solution. to many stations and convertions on the way from DVB's to Graka out.
b) this would i prefere. it uses only 4 wires and has the original resolution. if this dont work nothing will.
4)
a) same arguments like in 3)a) to long way through pc
b) to dark means to much loss, to long wire but compensable with higher amplification. to unsharp means that you have a bad cable with to much loss in the high frequency area, wrong output driver or wrong impedance. But wrong impedance at 11 meter long cable means also ghostpictures and if you dont have some it is only loss.
5)
Yes, no. Yes, i would play with the parameters for the graka, no, i don't know if it is possible to get better picture quality with WinDVBLive. My impression is to let WinDVBLive where it is and to use some of the original soft from tt or soft which uses the sdk from them.
Or stay away from Win and use Linux.
6)
In the DVBsVCR2 soft from Thomas Gatterweh i think is a point where you can change the behavior of the output from RGB to YCbCr.
No, i was wrong. There is a setting for PAL/NTSC, Composite&RGB, Composite&S-VHS and S-VHS.
You have to build your own converter.
7)
Yes, that's worth a try. RGB over such a long distance is "not the yellow of the egg"
I would prefere DVI because it uses "low voltage differential signals".
Can you send me a scan of the description of your "piano" (Bedienungsanleitung, techn. Daten) ? Would be nice. Alternatively an adress where i can download some description would be helpfull. The DVB's i have myself.