Stosowanie efektów w odtwarzanym filmie

Question

Jestem nowicjuszem w świecie Open Gl i często googlowałem, ale nie mogę znaleźć sposobu na wdrożenie Effects w odtwarzanym filmie. Po pewnych badaniach w końcu znalazłem class, który może być użyty do odtwarzania wideo na GLSurfaceView. I wiem od Google documentation i możemy zastosować efekty na wideo.

Postępując zgodnie z tym post udało mi się z powodzeniem zastosować efekty na bitmapach. Teraz chcę zrobić to dla mojego wideo, więc każda pomoc lub wskazówki są mile widziane.

Here jest VideoSurfaceView że używam do renderingu wideo, który jest odtwarzany

package me.crossle.demo.surfacetexture; 

import java.io.IOException; 
import java.nio.ByteBuffer; 
import java.nio.ByteOrder; 
import java.nio.FloatBuffer; 

import javax.microedition.khronos.egl.EGLConfig; 
import javax.microedition.khronos.opengles.GL10; 

import android.annotation.SuppressLint; 
import android.content.Context; 
import android.graphics.SurfaceTexture; 
import android.media.MediaPlayer; 
import android.opengl.GLES20; 
import android.opengl.GLSurfaceView; 
import android.opengl.Matrix; 
import android.util.Log; 
import android.view.Surface; 

@SuppressLint("ViewConstructor") 
class VideoSurfaceView extends GLSurfaceView { 

    VideoRender mRenderer; 
    private MediaPlayer mMediaPlayer = null; 

    public VideoSurfaceView(Context context, MediaPlayer mp) { 
     super(context); 

     setEGLContextClientVersion(2); 
     mMediaPlayer = mp; 
     mRenderer = new VideoRender(context); 
     setRenderer(mRenderer); 
    } 

    @Override 
    public void onResume() { 
     queueEvent(new Runnable(){ 
       public void run() { 
        mRenderer.setMediaPlayer(mMediaPlayer); 
       }}); 

     super.onResume(); 
    } 

    private static class VideoRender 
     implements GLSurfaceView.Renderer, SurfaceTexture.OnFrameAvailableListener { 
     private static String TAG = "VideoRender"; 

     private static final int FLOAT_SIZE_BYTES = 4; 
     private static final int TRIANGLE_VERTICES_DATA_STRIDE_BYTES = 5 * FLOAT_SIZE_BYTES; 
     private static final int TRIANGLE_VERTICES_DATA_POS_OFFSET = 0; 
     private static final int TRIANGLE_VERTICES_DATA_UV_OFFSET = 3; 
     private final float[] mTriangleVerticesData = { 
      // X, Y, Z, U, V 
      -1.0f, -1.0f, 0, 0.f, 0.f, 
      1.0f, -1.0f, 0, 1.f, 0.f, 
      -1.0f, 1.0f, 0, 0.f, 1.f, 
      1.0f, 1.0f, 0, 1.f, 1.f, 
     }; 

     private FloatBuffer mTriangleVertices; 

     private final String mVertexShader = 
       "uniform mat4 uMVPMatrix;\n" + 
       "uniform mat4 uSTMatrix;\n" + 
       "attribute vec4 aPosition;\n" + 
       "attribute vec4 aTextureCoord;\n" + 
       "varying vec2 vTextureCoord;\n" + 
       "void main() {\n" + 
       " gl_Position = uMVPMatrix * aPosition;\n" + 
       " vTextureCoord = (uSTMatrix * aTextureCoord).xy;\n" + 
       "}\n"; 

     private final String mFragmentShader = 
       "#extension GL_OES_EGL_image_external : require\n" + 
       "precision mediump float;\n" + 
       "varying vec2 vTextureCoord;\n" + 
       "uniform samplerExternalOES sTexture;\n" + 
       "void main() {\n" + 
       " gl_FragColor = texture2D(sTexture, vTextureCoord);\n" + 
       "}\n"; 

     private float[] mMVPMatrix = new float[16]; 
     private float[] mSTMatrix = new float[16]; 

     private int mProgram; 
     private int mTextureID; 
     private int muMVPMatrixHandle; 
     private int muSTMatrixHandle; 
     private int maPositionHandle; 
     private int maTextureHandle; 

     private SurfaceTexture mSurface; 
     private boolean updateSurface = false; 

     private static int GL_TEXTURE_EXTERNAL_OES = 0x8D65; 

     private MediaPlayer mMediaPlayer; 

     public VideoRender(Context context) { 
      mTriangleVertices = ByteBuffer.allocateDirect(
       mTriangleVerticesData.length * FLOAT_SIZE_BYTES) 
        .order(ByteOrder.nativeOrder()).asFloatBuffer(); 
      mTriangleVertices.put(mTriangleVerticesData).position(0); 

      Matrix.setIdentityM(mSTMatrix, 0); 
     } 

     public void setMediaPlayer(MediaPlayer player) { 
      mMediaPlayer = player; 
     } 

     @Override 
     public void onDrawFrame(GL10 glUnused) { 
      synchronized(this) { 
       if (updateSurface) { 
        mSurface.updateTexImage(); 
        mSurface.getTransformMatrix(mSTMatrix); 
        updateSurface = false; 
       } 
      } 

      GLES20.glClearColor(0.0f, 1.0f, 0.0f, 1.0f); 
      GLES20.glClear(GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT); 

      GLES20.glUseProgram(mProgram); 
      checkGlError("glUseProgram"); 

      GLES20.glActiveTexture(GLES20.GL_TEXTURE0); 
      GLES20.glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureID); 

      mTriangleVertices.position(TRIANGLE_VERTICES_DATA_POS_OFFSET); 
      GLES20.glVertexAttribPointer(maPositionHandle, 3, GLES20.GL_FLOAT, false, 
       TRIANGLE_VERTICES_DATA_STRIDE_BYTES, mTriangleVertices); 
      checkGlError("glVertexAttribPointer maPosition"); 
      GLES20.glEnableVertexAttribArray(maPositionHandle); 
      checkGlError("glEnableVertexAttribArray maPositionHandle"); 

      mTriangleVertices.position(TRIANGLE_VERTICES_DATA_UV_OFFSET); 
      GLES20.glVertexAttribPointer(maTextureHandle, 3, GLES20.GL_FLOAT, false, 
       TRIANGLE_VERTICES_DATA_STRIDE_BYTES, mTriangleVertices); 
      checkGlError("glVertexAttribPointer maTextureHandle"); 
      GLES20.glEnableVertexAttribArray(maTextureHandle); 
      checkGlError("glEnableVertexAttribArray maTextureHandle"); 

      Matrix.setIdentityM(mMVPMatrix, 0); 
      GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, mMVPMatrix, 0); 
      GLES20.glUniformMatrix4fv(muSTMatrixHandle, 1, false, mSTMatrix, 0); 

      GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4); 
      checkGlError("glDrawArrays"); 
      GLES20.glFinish(); 

     } 

     @Override 
     public void onSurfaceChanged(GL10 glUnused, int width, int height) { 

     } 

     @Override 
     public void onSurfaceCreated(GL10 glUnused, EGLConfig config) { 
      mProgram = createProgram(mVertexShader, mFragmentShader); 
      if (mProgram == 0) { 
       return; 
      } 
      maPositionHandle = GLES20.glGetAttribLocation(mProgram, "aPosition"); 
      checkGlError("glGetAttribLocation aPosition"); 
      if (maPositionHandle == -1) { 
       throw new RuntimeException("Could not get attrib location for aPosition"); 
      } 
      maTextureHandle = GLES20.glGetAttribLocation(mProgram, "aTextureCoord"); 
      checkGlError("glGetAttribLocation aTextureCoord"); 
      if (maTextureHandle == -1) { 
       throw new RuntimeException("Could not get attrib location for aTextureCoord"); 
      } 

      muMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix"); 
      checkGlError("glGetUniformLocation uMVPMatrix"); 
      if (muMVPMatrixHandle == -1) { 
       throw new RuntimeException("Could not get attrib location for uMVPMatrix"); 
      } 

      muSTMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uSTMatrix"); 
      checkGlError("glGetUniformLocation uSTMatrix"); 
      if (muSTMatrixHandle == -1) { 
       throw new RuntimeException("Could not get attrib location for uSTMatrix"); 
      } 


      int[] textures = new int[1]; 
      GLES20.glGenTextures(1, textures, 0); 

      mTextureID = textures[0]; 
      GLES20.glBindTexture(GL_TEXTURE_EXTERNAL_OES, mTextureID); 
      checkGlError("glBindTexture 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); 

      /* 
      * Create the SurfaceTexture that will feed this textureID, 
      * and pass it to the MediaPlayer 
      */ 
      mSurface = new SurfaceTexture(mTextureID); 
      mSurface.setOnFrameAvailableListener(this); 

      Surface surface = new Surface(mSurface); 
      mMediaPlayer.setSurface(surface); 
      mMediaPlayer.setScreenOnWhilePlaying(true); 
      surface.release(); 

      try { 
       mMediaPlayer.prepare(); 
      } catch (IOException t) { 
       Log.e(TAG, "media player prepare failed"); 
      } 

      synchronized(this) { 
       updateSurface = false; 
      } 

      mMediaPlayer.start(); 
     } 

     synchronized public void onFrameAvailable(SurfaceTexture surface) { 
      updateSurface = true; 
     } 

     private int loadShader(int shaderType, String source) { 
      int shader = GLES20.glCreateShader(shaderType); 
      if (shader != 0) { 
       GLES20.glShaderSource(shader, source); 
       GLES20.glCompileShader(shader); 
       int[] compiled = new int[1]; 
       GLES20.glGetShaderiv(shader, GLES20.GL_COMPILE_STATUS, compiled, 0); 
       if (compiled[0] == 0) { 
        Log.e(TAG, "Could not compile shader " + shaderType + ":"); 
        Log.e(TAG, GLES20.glGetShaderInfoLog(shader)); 
        GLES20.glDeleteShader(shader); 
        shader = 0; 
       } 
      } 
      return shader; 
     } 

     private int createProgram(String vertexSource, String fragmentSource) { 
      int vertexShader = loadShader(GLES20.GL_VERTEX_SHADER, vertexSource); 
      if (vertexShader == 0) { 
       return 0; 
      } 
      int pixelShader = loadShader(GLES20.GL_FRAGMENT_SHADER, fragmentSource); 
      if (pixelShader == 0) { 
       return 0; 
      } 

      int program = GLES20.glCreateProgram(); 
      if (program != 0) { 
       GLES20.glAttachShader(program, vertexShader); 
       checkGlError("glAttachShader"); 
       GLES20.glAttachShader(program, pixelShader); 
       checkGlError("glAttachShader"); 
       GLES20.glLinkProgram(program); 
       int[] linkStatus = new int[1]; 
       GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, linkStatus, 0); 
       if (linkStatus[0] != GLES20.GL_TRUE) { 
        Log.e(TAG, "Could not link program: "); 
        Log.e(TAG, GLES20.glGetProgramInfoLog(program)); 
        GLES20.glDeleteProgram(program); 
        program = 0; 
       } 
      } 
      return program; 
     } 

     private void checkGlError(String op) { 
      int error; 
      while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) { 
       Log.e(TAG, op + ": glError " + error); 
       throw new RuntimeException(op + ": glError " + error); 
      } 
     } 

    } // End of class VideoRender. 

} // End of class VideoSurfaceView. 

i tu jest mój główną działalność

package me.crossle.demo.surfacetexture; 

import java.io.File; 

import android.app.Activity; 
import android.content.res.AssetFileDescriptor; 
import android.content.res.Resources; 
import android.media.MediaPlayer; 
import android.os.Bundle; 
import android.os.Environment; 
import android.util.Log; 

public class MainActivity extends Activity { 

    private static final String TAG = "MainActivity"; 

    protected Resources mResources; 

    private VideoSurfaceView mVideoView = null; 
    private MediaPlayer mMediaPlayer = null; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 

     mResources = getResources(); 
     mMediaPlayer = new MediaPlayer(); 

     try { 
      File dir = Environment 
        .getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS); 

      File file = new File(dir, 
        "video.mp4"); 
      mMediaPlayer.setDataSource(file.getAbsolutePath()); 

     } catch (Exception e) { 
      Log.e(TAG, e.getMessage(), e); 
     } 

     mVideoView = new VideoSurfaceView(this, mMediaPlayer); 
     setContentView(mVideoView); 

    } 

    @Override 
    protected void onResume() { 
     super.onResume(); 
     mVideoView.onResume(); 
    } 
} 

Answer 1

Mam rozwiązać ten problem i jestem delegowania odpowiedź w Każdy, kto szuka innego sposobu na zastosowanie różnych filtrów w swoim filmie.

Po wskazaniu we właściwym kierunku przez Lunero i Fadden mogę teraz zastosować prawie wszystkie efekty EffectFactory do odtwarzanego wideo. Mimo że te efekty są przeznaczone tylko dla i , nie ma potrzeby zmiany oryginalnego filmu wideo, ale nadal wykonuję to zadanie.

To, co zrobiłem, to że zmieniono kod FragmentShaders zastosowany do renderowanego wideo i mogłem osiągnąć różne efekty.

Oto kod dla niektórych fragmentShaders.

Black and White Effect

String fragmentShader = "#extension GL_OES_EGL_image_external : require\n" 
       + "precision mediump float;\n" 
       + "varying vec2 vTextureCoord;\n" 
       + "uniform samplerExternalOES sTexture;\n" 
       + "void main() {\n" 
       + " vec4 color = texture2D(sTexture, vTextureCoord);\n" 
       + " float colorR = (color.r + color.g + color.b)/3.0;\n" 
       + " float colorG = (color.r + color.g + color.b)/3.0;\n" 
       + " float colorB = (color.r + color.g + color.b)/3.0;\n" 
       + " gl_FragColor = vec4(colorR, colorG, colorB, color.a);\n" 
       + "}\n"; 

negatywny wpływ

String fragmentShader = "#extension GL_OES_EGL_image_external : require\n" 
       + "precision mediump float;\n" 
       + "varying vec2 vTextureCoord;\n" 
       + "uniform samplerExternalOES sTexture;\n" 
       + "void main() {\n" 
       + " vec4 color = texture2D(sTexture, vTextureCoord);\n" 
       + " float colorR = (1.0 - color.r)/1.0;\n" 
       + " float colorG = (1.0 - color.g)/1.0;\n" 
       + " float colorB = (1.0 - color.b)/1.0;\n" 
       + " gl_FragColor = vec4(colorR, colorG, colorB, color.a);\n" 
       + "}\n"; 

Oryginalny film bez wpływu

video z czarno-białego efektu

Wideo z negatywny wpływ

Jeśli chcesz zastosować więcej efektów to proponuję spojrzeć na VidEffects na github. Pomoże Ci zastosować wiele różnych efektów w swoim filmie.