Posts by HalbesHaehnchen

Thanks for the Update.
After I switched to a Displayport monitor I couldnt use my ambilight system anymore. Now, after the update, it works with DX11/Games. Thank you!

Uhmm sorry I have no clue whats wrong. Its probably driver related I would say. I am using the STK grabber though. Someone with linux knowledge may be able to help.
I use Jessies Full version, not sure if that makes a diffrence.

Hello
I posted my current v4l2 Settings here:

https://hyperion-project.org/threads/stuck-….257/#post-2206

The first command disables the chroma thing. Then you have to play around with saturation and chroma_gain to get a natural saturated image.
I also raised image brightness, makes Hyperion works better with darker colors for me.

Ah btw, you have to put these command into a file that starts up with linux every time since they dont get saved.

Latest update fixed the problem for me. Thank you!
My solution to get the backlight I want was pretty simple raise the brightness of the captured picture. I did not want "full black" to emit light, but still darker colors to get noticed by hyperion.

These are my current settings

v4l2-ctl --set-ctrl=chroma_agc=0
v4l2-ctl --set-ctrl=chroma_gain=65
v4l2-ctl --set-ctrl=saturation=60
v4l2-ctl --set-ctrl=brightness=172
v4l2-ctl --set-ctrl=contrast=80

Thx for the quick replies.
Yes, I know how this feature works, more or less:D. And I wouldnt even notice it on movies/TV, it's just noticeable on desktop environment and games with some kind of menus or loading screens or whatever.

The thing I wonder about is that sometimes colors get stuck for a long time and then, the other second, they fade out correctly (on same settings).

Blackborder detection is deactivaed/removed from config file. It is just my crappy cam trying to handle the light environment that makes it looks like it.
Min luminance is on 0, I handle the backlight settings directly with v4l2 values.

Anyone noticed stuck colors? It has something to do with the "smoothing" part. If its disabled all is fine as far as I can tell.
Also shorter times help. The time the color is stuck can be 0 or 10 seconds and more. Its random.

[MEDIA=vidme]height=480;id=D6Nd;width=854[/MEDIA]

uhmm as for the "flickering / flash" effect I had similar problems with some grabbers. It is indeed very annoying, especially on desktop environment. I am using Jessie Full version. It might be a driver problem but I have no clue about Linux
I am using the pi2 with apa102 stripes and a 4K converter on NTSC (since my resolution is above 1080p I have to use it)

You could check v4l2 values

v4l2-ctl -list-ctrls

If you cant fix it with them it might be a hardware problem, either the grabber or the converter. You could check it with your windows machine, so you can see your cloned image on your own desktop.

I am using the STK grabber without problems (without USB hub). It offered me the best quality and its all stable. Only thing you get is "frame to small" error from time to time when you take screenshots. But thats only annyoing at the "Setup" phase.
Tested several grabbers (fushicai, stk, Empia chipset and Pinnacle Dazzle, whatever chipset it has xD )
Its either fushicai or STK I would say.

My STK is the "mumbi" one from amazon.

Try changing to PAL on your converter box

Would be helpful if Hypercon could access some of the v4l2 values. For me it helped a lot to disable chroma thingy. If hyperion does not get a decent source picture you can hardly fix it with the color corrections.

Chroma thingy on

And off

ya I found out it would work this way without any coding needed. However, only found 1080p grabbers so I decided not to buy one.

Tja sind meißtens die einfachsten Dinge auf die man gar nicht erst kommt Helligkeit alles über 1 killt eigentlich nur die Farben.
Viel Spaß schon mal beim weiter basteln

Ja hatte auch erst so ca 40cm aus nem alten Computer Tower dran. Das ging auch. Aber bei 1,50m kam wohl nicht mehr genug an.
Andere probleme die ich hatte waren 1. Led tot gelötet und diese blöden Steckverbinder hatten nen wackeligen.

probiere es mal mit einem Levelshifter. Kostetn ja nix bei ebay. Meine gingen zwar auch ohne aber nur mit kurzer Zuleitung und mit dem Teil ist alles gefühlt geschmeidiger. Kann ich mir natürlich auch nur einbilden, schaden tut es aber wohl kaum.

Hatte 266 LEDs (apa102 ob c oder nicht weiß ich nicht) an 21 Ampere hängen und sobald es zu hell wurde schmiert zb. der Splitter ab. Allerdings hängt auch alles Andere mit an dem Netzteil und wenn man mit der Helligkeit / Sättigung runter geht ist es kein Thema mehr.

Was bei mir noch Probleme gemacht hat waren zu lange Kabel zu den zwei Daten Leitungen. Mir hat da ein Levelshifter geholfen.

Maybe the v4l2 control panel could help? I wasn't able to get it to work though, the sliders were all greyed out.

https://apps.ubuntu.com/cat/applications/natty/qv4l2/

Edit: Nvm found another way to edit the settings.

v4l2-ctl --list-ctrls

Yup I think sharing a whole config isnt useful at all You have to change values a lot to get a matching white right?
Maybe some experimentation with neutral grey wall color instead of white could bring some scuccess. It works on cinema/projector screens. But who wants a grey wall

Yes you are right. I was a bit to fast with posting my experiences I will try your settings today and have a look

Gut das klingt logisch, hast wahrscheinlich wie ich ein eher kaltes oder zumindest neutrales Weiß eingestellt. Wenn du dann überdrehst kommt rot mit rein.

Hmm dann bin ich mit meinem Halbwissen auch am Ende Klingt für mich als wären deine LEDs schon am Limit aber wenn du sagst es geht mit der app, weiß nicht :confused:

ja... Das ist die selbe Funktion wie die "Helligkeit" denke ich. Stell die mal im Hypercon per SSH auf 0,1 oder so. Danach regel mit der app. Wird bei mir nur bis zu diesem Wert dann heller.