Hi everyone, I have a project that need to achieve the following requirements :
     1. 3D object above Video
     2. Video must be texture (Like texture on rectangle...)

I would like to display my video on polygon (as texture) and put 3d models on top of it.
I displayed a 3D object on the screen.

And then, I made another texture,


            GLES20.glGenTextures(1, textures, 0);
            mTextureID = textures[0];
            Log.d("textureNum",mTextureID+""); // just for debug
            GLES20.glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureID);
            GLES20.glTexParameterf(GL_TEXTURE_EXTERNAL_OES,GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
            GLES20.glTexParameterf(GL_TEXTURE_EXTERNAL_OES,GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);

            mSurface = new SurfaceTexture(mTextureID);
            mSurface.setOnFrameAvailableListener(this);


            Surface surface = new Surface(mSurface);

            mMediaPlayer = new MediaPlayer();

            if (file != null) {
                try {
                    mMediaPlayer.setDataSource(file.getAbsolutePath());
                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (SecurityException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            } else if (filePath != null) {
                try {
                    mMediaPlayer.setDataSource(filePath);
                } catch (IllegalArgumentException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (SecurityException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IllegalStateException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
            }

            mMediaPlayer.setSurface(surface);
            //surface.release();

            video1.setExternalId(mTextureID,GL_TEXTURE_EXTERNAL_OES);
            TextureManager.getInstance().addTexture("video_Play",video1)

in onSurfaceCreated function.
And, I made an function to createPolygon
    public void createPolygon(){
        myPolygon = Primitives.getPlane(1,1);
        myPolygon.setCenter(SimpleVector.ORIGIN);
        myPolygon.rotateX((float)(.5f*Math.PI));

        myPolygon.setTexture("video_Play");
        myPolygon.strip();
        myPolygon.build();

    }

But, if i run app, then Polygon's texture is just same with texture using just before....
I can hear the sound of video file, but I can't see video file on polygon...

This Link is the image when i run app.
https://drive.google.com/file/d/1FD2fc9QFXSkMJgsWudnZAK0O8XgNTzZc/view
Behind the 3Dobject, there is a Polygon with red texture(last texture used to draw 3D object), Not Video.

Is this a workable problem? Please give me some advice, thank you!