Raspberry - PS3 eye - controls has no effect

[samubence]

Using this addon on a Raspberry Pi Jessie (of_9.3) for grabbing frames from the PS3 eye is woking great. But the settings (exposure, gain, etc.) seems to have no effect, although the settings function returns 0 (no error).
Do you have any suggestion why is happening?

[mennowo]

Hi @samubence,

good to hear the addon works on the Pi, I have never tried that.

Have you also tried the ofVideoGrabber class? It may have improved over the past 4 years... It used not to have a settings implementation (actually, empty implementation), but it may have that now? What I used to do: set the settings in guvcview, close guvcview, and then the settings would remain the same when running my ofApp...

Anyway, in my experience, the settings method works, although not for every setting. As you can see in the source, all the settings method does is call xioctl() on the file descriptor. So, be sure you call initGrabber() before you call the settings method. I think contrast and saturation should work, about gain and exposure I am not sure.

Hope this helps, Menno