func sample_chromakey(vsw *libvsw.Vsw) {
wait := 8000
vsw.CutSub(0)
vsw.Cut(1)
// You have to insert a writable SD card to LiveWedge.
vsw.UploadFile("greenback.jpg")
vsw.SetChromaKey(libvsw.CHROMA_KEY_GREEN)
vsw.CutSub(4)
time.Sleep(time.Duration(wait) * time.Millisecond)
vsw.CutSub(0)
vsw.UploadFile("blueback.jpg")
vsw.SetChromaKey(libvsw.CHROMA_KEY_BLUE)
vsw.MixSub(2000, 4)
time.Sleep(time.Duration(wait) * time.Millisecond)
vsw.MixSub(2000, 0)
vsw.UploadFile("purpleback.jpg")
vsw.SetChromaKey(libvsw.CHROMA_KEY_PURPLE)
vsw.CutSub(4)
time.Sleep(time.Duration(wait) * time.Millisecond)
vsw.CutSub(0)
vsw.UploadFile("redback.jpg")
vsw.SetChromaKey(libvsw.CHROMA_KEY_RED)
vsw.MixSub(2000, 4)
time.Sleep(time.Duration(wait) * time.Millisecond)
vsw.MixSub(2000, 0)
}
