Assuming you're not affected by the support article "Why can't I adjust picture/audio settings with my Slingbox PRO-HD?" (and I don't believe you are) you may be able to set the brightness, contrast, saturation, and hue settings with the no-longer-supported SlingPlayer for Mac OS X*. You'll need the admin password for your Slingbox. Also, if you're not on the same LAN as the Slingbox you'll need either the Slingbox ID (should be available here if you "Edit" the Slingbox in question) or IP address & port of the Slingbox.
Try the following:
- Download SlingPlayer for Mac OS X
- Install and open SlingPlayer for Mac OS X
- Connect to your Slingbox (via Slingbox ID or IP/port) and start streaming video
- From the "Slingbox" menu, select "Get Info..."
- Select the "Configuration" tab and click "Change Audio/Video Setup"
- Step through the Setup Assistant and hopefully you should reach the following page:
- Adjust the video as desired and complete the setup assistant
*This feature isn't mentioned in SlingPlayer for Mac OS X's user guide. The relevant portion of the SlingPlayer for Windows manual is here:
Here is where you can adjust the video picture coming from your Slingbox. Adjusting these Slingbox settings does not change your television or external device's audio/video settings. However, every user who watches this Slingbox views it with the adjusted settings.
- Brightness: darken or brighten the video.
- Contrast: adjust the difference between the light and darkareas of the video picture.
- Saturation: increase or decrease the intensity of the video color.
- Hue: adjust the balance between the red and green picture levels."