Method to Transform the video

TransforVideoMethod.kt

val effect = arrayListOf<Effect>()
effect.add(RgbFilter.createGrayscaleFilter())
effect.add(MatrixTransformationFactory.createZoomInTransition())
effect.add(ScaleAndRotateTransformation.Builder().setRotationDegrees(90F).build())
val transformer = with(Transformer.Builder(this)) {
            addListener(object : Transformer.Listener {
                override fun onCompleted(composition: Composition, exportResult: ExportResult) {
                    //Play the video from the path you specified below
                }

                override fun onError(
                    composition: Composition,
                    exportResult: ExportResult,
                    exportException: ExportException
                ) {
                    //Handle error scenarios
                }
            })
            build()
        }
val inputMediaItem = MediaItem.fromUri(videoUrl)
val filePath = File(externalCacheDir, fileName)
val editedMediaItem = EditedMediaItem.Builder(inputMediaItem).apply {
    setRemoveAudio(true)
    setEffects(Effects(mutableListOf(), effect))
}
transformer.start(editedMediaItem.build(), filePath.absolutePath)