chromakeyvideoview

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chromakeyvideoview

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An Android video view with transparency and silhouetting

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// repository documentation

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# Chroma Key Video View
Chroma Key Video View is a video player which can set one solid color in a video (such as a green/blue screen background)
to transparent and change all other colors in the video to any color of your choosing (silhouetting). Additionally, it also 
has fade in, fade out, video scaling and video centering features.

## Gradle dependency
The Gradle dependency is provided by [JitPack](https://jitpack.io). 
Add the following repository to the project's build.gradle file

allprojects {
        repositories {
            maven { url 'https://jitpack.io' }
        }
    }
    
Finally, add this dependency to your module's build.gradle file:

implementation 'com.github.kalherath:chromakeyvideoview:1.02-alpha01'
    
## How to use it
Add a ChromaKeyVideoView inside a layout xml.
This is an example with all the unique parameters for this view:

```
  <com.chroma.view.ChromaKeyVideoView
        android:id="@+id/video_view"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        custom:videoScale="0.9"
        custom:centerVideoX="0.5"
        custom:centerVideoY="0.5"
        custom:silhouetteMode="true"
        custom:backgroundColor="#00ff00"
        custom:silhouetteColor="#000000"
        custom:tolerance="0.3"
        custom:looping="true"
        custom:fadeInAtStart="true"
        custom:fadeOutTowardsEnd="true"
        custom:fadeInDuration="200"
        custom:fadeInDelay="500"
        custom:fadeOutDuration="200"
        custom:fadeOutLead="500"
        android:visibility="visible"/> 
  ```
   
Then set up and use the view with a video in an Activity or Fragment:

```
  class VideoFragment : Fragment(), ChromaKeyVideoView.OnVideoStartedListener {

private lateinit var videoView : ChromaKeyVideoView

override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?,
                              savedInstanceState: Bundle?): View? {
        val view = inflater.inflate(R.layout.video_fragment, container, false)
        videoView = view.findViewById(R.id.video_view)
        videoView.setOnVideoStartedListener(this)
        val packageName : String? = context?.packageName
        packageName?.let {
            videoView.setVideoFromUri(Uri.parse("android.resource://" + it + "/raw/myvideo"))
        }
        return view
    }

override fun onResume() {
        super.onResume()
        videoView.onResume() //always call this during onResume
    }

override fun onPause() {
        videoView.onPause() //always call this during onPause
        super.onPause()
    }

override fun onVideoStarted() {
      //things to do once the video starts
    }
}
```
There are several ways to set the video source using setVideoFrom... methods.

## Credits

Thanks to [Pavel Semak](https://github.com/pavelsemak) and his library [Alpha Movie](https://github.com/pavelsemak/alpha-movie)
on which Chroma Key Video View is based.

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