ProcAmp is a utility shader for tweaking video frames. It's developed for providing optional functionalities of video playback with the VideoPlayer component that is newly introduced in Unity 5.6.
- Unity 5.6
ProcAmp is supposed to be available in all the platforms. If you find any problem, plaese report it to Issues.
- Basic color adjustment (brightness, contrast and saturation).
- White balance (temperature and cyan-purple tint).
- Chroma keying and spill removal.
- Basic transform (trimming, scaling and position offset).
There are two variants of implementation of ProcAmp.
-
The ProcAmp shader can be used with a material asset. It provides all the basic functionalities of ProcAmp.
-
The ProcAmp component can be used with a game object. It also provides optional functionalities that are useful in complex setups.
The ProcAmp component provides a simple rendering functionality that blits the resulting images to the screen with fit-to-screen scaling. This would be a handy option when trying to show the video in full-screen mode.
- Create a VideoPlayer (drag & drop a video asset to the hierarchy).
- Change Render Mode of the VideoPlayer to "API Only".
- Add the ProcAmp component to the game object.
- That's it!
When considering to support multiple resolution/aspect ratio, it's recommended using the RawImage component of the UI system to handle the situation properly. The TargetImage property of ProcAmp is used in such cases. It updates a given RawImage with resulting images.
- Create a UI canvas and add a RawImage to it.
- Create a VideoPlayer (drag & drop a video asset to the hierarchy).
- Change Render Mode of the VideoPlayer to "API Only".
- Add the ProcAmp component to the game object. - Set the RawImage in the canvas to Target Image of the ProcAmp.
The ProcAmp shader (Klak/Video/ProcAmp) is an unlit shader combined with the
functionalities of ProcAmp. It's useful when using a material/renderer pair
to display a video.
- Create a quad object ("Create" -> "3D Object" -> "Quad").
- Create a material and change shader to
Klak/Video/ProcAmp. - Set this material to the quad object.
- Create a VideoPlayer (drag & drop a video asset to the hierarchy).
- Change Render Mode of the VideoPlayer to "Material Override".
- Set the quad object to the Renderer property.
- Change Material Property to "_MainTex".
When a RenderTexture is given to the TargetTexture property, it updates the given RenderTexture with resulting images. This is useful when trying to use the video with other shaders or renderers.
The ProcAmp component works as an image effect when it's attached to a camera object. It overlays the resulting images onto the screen with fit-to-screen scaling.