support VideoRecordController using without selenium(webdriver)

src/main/java/com/aimmac23/node/RecordVideoCallable.java

@@ -24,6 +24,7 @@ public class RecordVideoCallable implements Callable<File> {
 
 	private LibVPX vpxLibrary;
 	private EncoderInterface encoder;
+	private File outputFile;
 
 	public RecordVideoCallable(int targetFramerate, ScreenshotSource screenshotSource, LibVPX vpxLibrary, EncoderInterface encoderLibrary) {
 		this.targetFramerate = targetFramerate;
@@ -33,12 +34,17 @@ public RecordVideoCallable(int targetFramerate, ScreenshotSource screenshotSourc
 		this.targetFramerateSleepTime = (int)((1.0 / targetFramerate) * 1000.0);
 	}
 
+	void setOutputFile(File outputFile) {
+		this.outputFile = outputFile;
+	}
+
 	@Override
 	public File call() throws Exception {
 		int frames = 0;
 
-		File outputFile = File.createTempFile("screencast", ".webm");
-
+		if (outputFile == null) {
+			outputFile = File.createTempFile("screencast", ".webm");
+		}
 
 		log.info("Starting new recording at " + targetFramerate + " fps with resolution " 
 		+ screenshotSource.getWidth() + "x" + screenshotSource.getHeight());

src/main/java/com/aimmac23/node/VideoRecordController.java

@@ -49,11 +49,16 @@ public VideoRecordController(IRecordArgs recordArgs, LibVPX vpxLibrary, EncoderI
 	}
 
 	public void startRecording() throws Exception {
+		startRecording(null, 0);
+	}
+
+	public void startRecording(File outputVideo, int targetFramerate) throws Exception {
 		if(currentCallable != null) {
 			throw new IllegalStateException("Video recording currently in progress, cannot record again");
 		}
-
-		currentCallable = new RecordVideoCallable(targetFramerate, screenshotSource, vpxLibrary, encoderInterface);
+		final int frameRate = targetFramerate > 0 ? targetFramerate : this.targetFramerate;
+		currentCallable = new RecordVideoCallable(frameRate, screenshotSource, vpxLibrary, encoderInterface);
+		currentCallable.setOutputFile(outputVideo);
 		currentFuture = executor.submit(currentCallable);
 	}
 

src/test/java/com/aimmac23/hub/TestScreenRecordMain.java

@@ -0,0 +1,40 @@
+package com.aimmac23.hub;
+
+import java.io.File;
+import java.io.IOException;
+
+import org.apache.commons.lang3.SystemUtils;
+import org.junit.Assert;
+import org.junit.Test;
+
+import com.aimmac23.node.VideoRecordController;
+import com.aimmac23.node.args.SystemPropertyRecordArgs;
+import com.aimmac23.node.jna.EncoderInterface;
+import com.aimmac23.node.jna.JnaLibraryLoader;
+
+public class TestScreenRecordMain {
+
+    public static void main(String[] args) throws Exception {
+       new TestScreenRecordMain().test4standardAlone();
+        //System.exit(0);
+    }
+
+    @Test
+    public void test4standardAlone() throws Exception, InterruptedException, IOException {
+        JnaLibraryLoader.init();
+        final EncoderInterface encoder = JnaLibraryLoader.getEncoder();
+        final File tmp = SystemUtils.getJavaIoTmpDir();
+        try (VideoRecordController controller =
+            new VideoRecordController(new SystemPropertyRecordArgs(), JnaLibraryLoader.getLibVPX(), encoder)) {
+            final File destVideo = new File(tmp,"demo1.webm");
+            controller.startRecording(destVideo, 15);
+            Thread.sleep(5000);
+            File recording = controller.stopRecording();
+            System.out.println("recorded video:" + recording);
+            Assert.assertTrue("Recording file does not exist!", recording.exists());
+            Assert.assertTrue("File is zero length!", recording.length() > 0);
+            Assert.assertEquals(destVideo, recording);
+        }
+    }
+
+}