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POWrong Color DirectMediaPlayer VLCj and Libgdx
 

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  1. POWrong Color DirectMediaPlayer VLCj and Libgdx
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    <p>I use Libgdx and VLCj to play video, but the color is wrong (the left side on the image is ok). I use DirectMediaPlayer to catch frame data from the memory, create texture and draw on the screen.</p> <p><img src="https://i.stack.imgur.com/3OKRb.jpg" alt="enter image description here"></p> <p>My code:</p> <pre><code>import java.awt.GraphicsEnvironment; import java.awt.image.BufferedImage; import java.awt.image.DataBufferInt; import java.nio.ByteBuffer; import java.nio.ByteOrder; import java.nio.IntBuffer; import uk.co.caprica.vlcj.binding.LibVlc; import uk.co.caprica.vlcj.player.MediaPlayerFactory; import uk.co.caprica.vlcj.player.direct.BufferFormat; import uk.co.caprica.vlcj.player.direct.BufferFormatCallback; import uk.co.caprica.vlcj.player.direct.DirectMediaPlayer; import uk.co.caprica.vlcj.player.direct.RenderCallbackAdapter; import uk.co.caprica.vlcj.player.direct.format.RV32BufferFormat; import uk.co.caprica.vlcj.runtime.RuntimeUtil; import uk.co.caprica.vlcj.runtime.x.LibXUtil; import com.badlogic.gdx.ApplicationListener; import com.badlogic.gdx.Gdx; import com.badlogic.gdx.graphics.GL10; import com.badlogic.gdx.graphics.OrthographicCamera; import com.badlogic.gdx.graphics.Pixmap; import com.badlogic.gdx.graphics.Texture; import com.badlogic.gdx.graphics.g2d.BitmapFont; import com.badlogic.gdx.graphics.g2d.Gdx2DPixmap; import com.badlogic.gdx.graphics.g2d.SpriteBatch; import com.badlogic.gdx.utils.GdxRuntimeException; import com.sun.jna.Native; import com.sun.jna.NativeLibrary; public class MyGdxGame implements ApplicationListener { private OrthographicCamera camera; private Texture texture; private BitmapFont font; private SpriteBatch batch; float w = 800; float h = 600; private BufferedImage image; private MediaPlayerFactory factory; private DirectMediaPlayer mediaPlayer; private Pixmap pixmap; @Override public void create() { w = Gdx.graphics.getWidth(); h = Gdx.graphics.getHeight(); camera = new OrthographicCamera(); camera.setToOrtho(false, w, h); camera.update(); font = new BitmapFont(); batch = new SpriteBatch(); LibXUtil.initialise(); NativeLibrary.addSearchPath(RuntimeUtil.getLibVlcLibraryName(), "C:\\Users\\Dima\\Desktop\\vlc-2.1.0_64\\"); Native.loadLibrary(RuntimeUtil.getLibVlcLibraryName(), LibVlc.class); image = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration().createCompatibleImage((int) w, (int) h); image.setAccelerationPriority(1.0f); String[] args = { "--no-video-title-show", "--verbose=3" }; String media = "C:\\video512.mp4"; factory = new MediaPlayerFactory(args); mediaPlayer = factory.newDirectMediaPlayer(new TestBufferFormatCallback(), new TestRenderCallback()); mediaPlayer.playMedia(media); System.out.println(LibVlc.INSTANCE.libvlc_get_version()); } @Override public void dispose() { Gdx.app.exit(); } @Override public void render() { Gdx.gl.glClearColor(1, 1, 1, 1); Gdx.gl.glClear(GL10.GL_COLOR_BUFFER_BIT); batch.begin(); if (pixmap != null) { texture = new Texture(pixmap); batch.draw(texture, 0, 0, 800, 600); } font.draw(batch, "FPS: " + Gdx.graphics.getFramesPerSecond(), 10, 20); batch.end(); } private final class TestRenderCallback extends RenderCallbackAdapter { public TestRenderCallback() { super(((DataBufferInt) image.getRaster().getDataBuffer()).getData()); } @Override public void onDisplay(DirectMediaPlayer mediaPlayer, int[] data) { ByteBuffer byteBuffer = ByteBuffer.allocateDirect(data.length * 4).order(ByteOrder.nativeOrder()); IntBuffer intBuffer = byteBuffer.asIntBuffer(); intBuffer.put(data); try { long[] nativeData = new long[] { 0, 800, 600, Gdx2DPixmap.GDX2D_FORMAT_RGBA8888 }; Gdx2DPixmap pixmapData = new Gdx2DPixmap(byteBuffer, nativeData); pixmap = new Pixmap(pixmapData); } catch (Exception e) { pixmap = null; throw new GdxRuntimeException("Couldn't load pixmap from image data", e); } } } private final class TestBufferFormatCallback implements BufferFormatCallback { @Override public BufferFormat getBufferFormat(int sourceWidth, int sourceHeight) { return new RV32BufferFormat((int) w, (int) h); } } @Override public void resize(int width, int height) { } @Override public void pause() { } @Override public void resume() { } } </code></pre> <p><strong>If you know others ways to draw video in java, let me know.</strong></p> <h2>Solved!</h2> <p>Method <strong>getBufferFormat</strong> in TestBufferFormatCallback class was not correct. Right variant:</p> <pre><code>@Override public BufferFormat getBufferFormat(int sourceWidth, int sourceHeight) { sourceWidth = 800; sourceHeight = 600; System.out.println("Got VideoFormat: " + sourceWidth + "x" + sourceHeight); BufferFormat format = new BufferFormat("RGBA", sourceWidth, sourceHeight, new int[] { sourceWidth * 4 }, new int[] { sourceHeight }); return format; } </code></pre>
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