When adding water mark by GPU using service, it doest not stop service when stopping service

[KishanViramgama]

When adding water mark by GPU using service, it doest not stop service when stopping service

call gpuMp4Composer.cancel(); but not stop.

gpuMp4Composer = null;
gpuMp4Composer = new GPUMp4Composer(filePath_local , file_path)
		.filter(new GlWatermarkFilter(image, GlWatermarkFilter.Position.RIGHT_BOTTOM))
		.listener(new GPUMp4Composer.Listener() {
			@Override
			public void onProgress(double progress) {
				double value = progress * 100;
			}
			@Override
			public void onCompleted() {				
			}
			@Override
			public void onCanceled() {				
			}
			@Override
			public void onFailed(Exception exception) {				
			}
		})
		.start();