Modify And Update Camera Frame Via Glsurfaceview

I am working with a GLSurfaceView activity to display the camera frame on an android device. As I am newb in OpenGl Es, I wondered how I can get the image buffer and modify it, the

Solution 1:

As fadden explained, you cannot change the preview buffer that is connected to SurfaceTexture. But you can obtain the preview buffers with onPreviewFrame(), modify it and push the result to OpenGL via glTexSubImage2D(). There are two pitfalls: you should hide the actual preview (probably connecting it to a texture that will not be visible on your GL surface), and you should do all processing fast enough (20 FPS at least for the "preview" to look natural).