我已经使用着色器成功处理了图像帧.现在我需要将处理过的帧编码为视频. GLSurfaceView.Renderer提供onDrawFrame(GL10 ..)方法.在这种方法中,我试图仅使用glReadPixels()读取图像帧,然后将帧放在队列上以便编码为视频.就它而言,glReadPixels()太慢了 – 我的帧速率是单位数.我正在尝试使用像素缓冲对象来加快速度.这不起作用.插入pbo后,帧速率不变.这是我第一次使用OpenGL,我不知道从哪里开始寻找问题.我这样做了吗？谁能给我一些方向？提前致谢.

public class MainRenderer implements GLSurfaceView.Renderer,SurfaceTexture.OnFrameAvailableListener {

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    public void onDrawFrame ( GL10 gl10 ) {

        //Create a buffer to hold the image frame     
        ByteBuffer byte_buffer = ByteBuffer.allocateDirect(this.width * this.height * 4);
        byte_buffer.order(ByteOrder.nativeOrder());

        //Generate a pointer to the frame buffers
        IntBuffer image_buffers = IntBuffer.allocate(1); 
        GLES20.glGenBuffers(1,image_buffers);

        //Create the buffer
        GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER,image_buffers.get(0));
        GLES20.glBufferData(GLES20.GL_ARRAY_BUFFER,byte_buffer.limit(),byte_buffer,GLES20.GL_STATIC_DRAW);
        GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER,image_buffers.get(0));

        //Read the pixel data into the buffer
        gl10.glReadPixels(0,this.width,this.height,GL10.GL_RGBA,GL10.GL_UNSIGNED_BYTE,byte_buffer);

        //encode the frame to video
        enQueueForEncoding(byte_buffer);

        //unbind the buffer
        GLES20.glBindBuffer(GLES20.GL_ARRAY_BUFFER,0);
    }

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}