Starting with Air Video Server HD 2.1.0 hardware accelerated transcoding through QuickSync is supported. For now it is disabled by default and needs to be enabled in Air Video Server HD Settings
Mac OS X
H.264 hardware decoding and encoding is supported on models with dedicated video encoder - these are models which also supports AirPlay Mirroring.
There is one caveat - only one transcoding session can be hardware accelerated, so if you transcode multiple streams (or another software is using the hardware) Air Video Server HD will fallback to software transcoding.
You can check if your CPU supports QuickSync here
Windows with integrated (Intel HD) GPU only
Accelerated transcoding on computers that only have integrated Intel HD GPU (HD2000 or newer) and no external GPU should work without any complications. Make sure that you have latest Intel drivers installed.
Windows with both integrated (Intel HD) and external (ATI/nVidia) GPU
Here the situation is bit more complicated. In order for this to work, you need Intel HD4000 or newer and be running Windows 8 or newer.
1. Make sure that Integrated GPU is enabled in your PC BIOS setup
Check your BIOS Setup manual for instructions on how to do this.
After this has been successfully done, you should see both the Integrated and External GPU in your Device Manager.
2. Install latest Intel Drivers
The drivers can be obtained here.
3. Windows 8.0 seems to require "fake" display for the Intel GPU
3.1 Go to Screen Resolution
Right click on your desktop and chose "Screen Resolution"
Click the "Detect" button
Selected detected display for Intel HD graphics and select "Try to select anyway on: VGA"
Click on "Apply"
Extend displays: Chose your main display, for Multiple Displays select "Extend these displays" and click on "Apply".