Before You Start
When you open DouWan, if the message shown below appears, please set up your computer according to one of the options introduced below to optimise the mirroring effect. Otherwise, no setting change is needed.

Today many laptops come with dual graphics cards: a discrete unit (NVIDIA) and an integrated unit (Intel). The discrete unit handles large software and games while the integrated unit runs daily applications. Considering power consumption and cost, the integrated chipset is less powerful in graphics processing while the discrete unit is less capable in multimedia processing. As DouWan uses multimedia processing to accelerate video decoding, we need to designate the integrated chip as the graphics processor to achieve the best casting effect.
Option 1
This setting is recommended because it does not change the preferred graphics processor of other programmes on your computer.
1
Right-click the Windows desktop, then click NVIDIA Control Panel from the context menu.

2
Select Manage 3D Settings under 3D Settings.

3
Click on the Program Settings tab.

4
Click the Add button in Programme settings.

5
Click on the Browse button on the bottom right in the open programme list.

6
Choose file C:\Program Files (x86)\douwan\AirplayReceiver.exe, click Open.
(If DouWan is not installed in the default directory, please go to the actual installation directory)
(If DouWan is not installed in the default directory, please go to the actual installation directory)

7
After selecting the programme, choose Integrated graphics in the "Select the preferred graphics processor for this programme" drop-down list.

8
Click Apply at the bottom to apply it to the system.

9
Close DouWan when the Apply button disappears. Restart DouWan 3 minutes later.

Option 2
Back to TopIf after setting up Option 1, the message "Your computer's graphics card setting does not support hardware decoding..." still appears, please try this option.
1
Right-click the Windows desktop, then click NVIDIA Control Panel from the context menu.

2
Select Manage 3D Settings under 3D Settings.

3
Click on the Global Settings tab.

4
In the Global Settings, choose Integrated graphics in the Preferred graphics processor drop-down list.

5
Click Apply at the bottom to apply it to the system.

6
Close DouWan when the Apply button disappears. Restart DouWan 3 minutes later.

Option 3
Back to TopIf you cannot find the NVIDIA Control Panel on your computer, please try this option.
1
Right-click the bottom left of the desktop, choose "Device Manager" in the pop-up menu.

2
After entering the Device Manager, click on the triangle icon on the left of Display adaptor.

3
Choose NVIDIA graphics card in the expanded list of Display adaptor option.

4
After you choose the NVIDIA graphics card, right-click, and select Disable device.

5
When a down arrow appears in front of the NVIDIA graphics card, you have successfully disabled it. Close DouWan and restart 3 minutes later.
