如何使用GPU Video-android获取Watermark并在视频上进行过滤（） _watermark

要须心地收汗马，孔孟行世目杲杲。这篇文章主要讲述如何使用GPU Video-android获取Watermark并在视频上进行过滤？相关的知识，希望能为你提供帮助。
我正在研究视频编辑android应用程序，并希望在视频上同时应用过滤器和水印。我一直在为这个https://github.com/MasayukiSuda/GPUVideo-android使用GPUVideo-android lib
问题出在这个库中我无法同时获得水印和fliter。
下面是我的一个过滤器的FRAGMENT_SHADER

private static final String FRAGMENT_SHADER = "precision mediump float; " + "varying vec2 vTextureCoord; " + "uniform lowp sampler2D sTexture; " + "const highp vec3 weight = vec3(0.2125, 0.7154, 0.0721); " + "void main() {" + "vec4 FragColor = texture2D(sTexture, vTextureCoord); " + "gl_FragColor.r = dot(FragColor.rgb, vec3(.393, .769, .189)); " + "gl_FragColor.g = dot(FragColor.rgb, vec3(.349, .686, .168)); " + "gl_FragColor.b = dot(FragColor.rgb, vec3(.272, .534, .131)); " + "}"; and below is for watermark protected static final String DEFAULT_FRAGMENT_SHADER = "precision mediump float; " + "varying vec2 vTextureCoord; " + "uniform lowp sampler2D sTexture; " + "uniform lowp sampler2D oTexture; " + "void main() { " + "lowp vec4 textureColor = texture2D(sTexture, vTextureCoord); " + "lowp vec4 textureColor2 = texture2D(oTexture, vTextureCoord); " + " " + "gl_FragColor = mix(textureColor, textureColor2, textureColor2.a); " + "} ";

【如何使用GPU Video-android获取Watermark并在视频上进行过滤（）】我希望将两种效果结合在一起：
https://github.com/MasayukiSuda/GPUVideo-android/blob/master/gpuv/src/main/java/com/daasuu/gpuv/egl/filter/GlWatermarkFilter.java
https://github.com/MasayukiSuda/GPUVideo-android/blob/master/gpuv/src/main/java/com/daasuu/gpuv/egl/filter/GlMonochromeFilter.java
请帮助我，我尝试为下面扩展GLFilter类的过滤器创建一个自定义类是我的SepiaFilter和OverlayFilter的代码。

public class SepiaFilter extends OverlayFilter {private Bitmap bitmap; private Position position = Position.LEFT_TOP; private static final String FRAGMENT_SHADER = "precision mediump float; " + "varying vec2 vTextureCoord; " + "uniform lowp sampler2D sTexture; " + "const highp vec3 weight = vec3(0.2125, 0.7154, 0.0721); " + "void main() {" + "vec4 FragColor = texture2D(sTexture, vTextureCoord); " + "gl_FragColor.r = dot(FragColor.rgb, vec3(.393, .769, .189)); " + "gl_FragColor.g = dot(FragColor.rgb, vec3(.349, .686, .168)); " + "gl_FragColor.b = dot(FragColor.rgb, vec3(.272, .534, .131)); " + "}"; public SepiaFilter(Bitmap bitmap) { super(FRAGMENT_SHADER); this.bitmap = bitmap; }public SepiaFilter(Bitmap bitmap, Position position) { super(FRAGMENT_SHADER); this.bitmap = bitmap; this.position = position; }@Override protected void drawCanvas(Canvas canvas) { if (bitmap != null & & !bitmap.isRecycled()) { switch (position) { case LEFT_TOP: canvas.drawBitmap(bitmap, 0, 0, null); break; case LEFT_BOTTOM: canvas.drawBitmap(bitmap, 0, canvas.getHeight() - bitmap.getHeight(), null); break; case RIGHT_TOP: canvas.drawBitmap(bitmap, canvas.getWidth() - bitmap.getWidth(), 0, null); break; case RIGHT_BOTTOM: canvas.drawBitmap(bitmap, canvas.getWidth() - bitmap.getWidth(), canvas.getHeight() - bitmap.getHeight(), null); break; } } }public enum Position { LEFT_TOP, LEFT_BOTTOM, RIGHT_TOP, RIGHT_BOTTOM } }public abstract class OverlayFilter extends GlFilter {private int[] textures = new int[1]; private Bitmap bitmap = null; protected Size inputResolution = new Size(1280, 720); public OverlayFilter(String FRAGMENT_SHADER) { super(DEFAULT_VERTEX_SHADER, FRAGMENT_SHADER); }public void setResolution(Size resolution) { this.inputResolution = resolution; }@Override public void setFrameSize(int width, int height) { super.setFrameSize(width, height); setResolution(new Size(width, height)); }private void createBitmap() { releaseBitmap(bitmap); bitmap = Bitmap.createBitmap(inputResolution.getWidth(), inputResolution.getHeight(), Bitmap.Config.ARGB_8888); }@Override public void setup() { super.setup(); // 1 GLES20.glGenTextures(1, textures, 0); GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textures[0]); GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR); GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR); GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE); GLES20.glTexParameteri(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE); createBitmap(); }@Override public void onDraw() { if (bitmap == null) { createBitmap(); } if (bitmap.getWidth() != inputResolution.getWidth() || bitmap.getHeight() != inputResolution.getHeight()) { createBitmap(); }bitmap.eraseColor(Color.argb(0, 0, 0, 0)); Canvas bitmapCanvas = new Canvas(bitmap); bitmapCanvas.scale(1, -1, bitmapCanvas.getWidth() / 2, bitmapCanvas.getHeight() / 2); drawCanvas(bitmapCanvas); int offsetDepthMapTextureUniform = getHandle("oTexture"); // 3GLES20.glActiveTexture(GLES20.GL_TEXTURE3); GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textures[0]); if (bitmap != null & & !bitmap.isRecycled()) { GLUtils.texImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_RGBA, bitmap, 0); }GLES20.glUniform1i(offsetDepthMapTextureUniform, 3); }protected abstract void drawCanvas(Canvas canvas); public static void releaseBitmap(Bitmap bitmap) { if (bitmap != null & & !bitmap.isRecycled()) { bitmap.recycle(); bitmap = null; } } }// code to apply filterBitmap watermark = BitmapFactory.decodeResource(getResources(), R.drawable.shashankimg); GPUPlayerView gpuPlayerView.setGlFilter( new SepiaFilter(watermark));

答案使用GlFilterGroup类。写的用法是读我的。
不应该编辑着色器。
https://github.com/MasayukiSuda/GPUVideo-android/blob/master/gpuv/src/main/java/com/daasuu/gpuv/egl/filter/GlFilterGroup.java