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• Creating video from image using FFMPEG

  27 août 2012, par yashprit

  I am creating video editing application using JavaScript, ffmpeg and java. Using FFMPEG i have created extract n frame of video, than using canvas.toDataUrl I am replacing new image with existing image frame rate and everything has taken care, but when I use these image to create video, FFMPEG never include newly created PNG image.

  code to save png image from HTML5 canvas

  Base64 decoder = new Base64();
  
      byte[] pic = decoder.decodeBase64(request.getParameter("pic"));
  
      String frameCount = request.getParameter("frame");
  
      InputStream in = new ByteArrayInputStream(pic);
  
      BufferedImage bImageFromConvert = ImageIO.read(in);
  
      String outdir = "output\\"+frameCount;
  
      //Random rand = new Random();
  
      File file = new File(outdir);
  
      if(file.isFile()){
  
          if(file.delete()){
  
              File writefile = new File(outdir);
  
              ImageIO.write(bImageFromConvert, "png", file);
  
          }
  
      }

  Code for creating image from video

  String filePath = "D:\\temp\\some.mpg";
  
      String outdir = "output";
  
      File file = new File(outdir);
  
      file.mkdirs();
  
      Map m = System.getenv();
  
  
  
      /*
  
       * String command[] =
  
       * {"D:\\ffmpeg-win32-static\\bin\\ffmpeg","-i",filePath
  
       * ,"-r 30","-f","image2",outdir,"\\user%03d.jpg"};
  
       * 
  
       * ProcessBuilder pb = new ProcessBuilder(command); pb.start();
  
       */
  
      String commands = "D:\\ffmpeg-win32-static\\bin\\ffmpeg -i " + filePath
  
              + " -r 30  -f image2 " + outdir + "\\image%05d.png";
  
      Process p = Runtime.getRuntime().exec(commands);

  code for creating video from image

  String filePath = "output";
  
      File fileP = new File(filePath);
  
      String commands = "D:\\ffmpeg-win32-static\\bin\\ffmpeg -f image2 -i "
  
              + fileP + "\\image%5d.png " + fileP + "\\video.mp4";
  
      System.out.println(commands);
  
      Runtime.getRuntime().exec(commands);
  
      System.out.println(fileP.getAbsolutePath());

• Android bytedeco javacpp ffmpeg decode h264 bytes to yuv and render with openGL ES 2.0. Wrong colors

  9 juin 2015, par tema_man

  there ! I try to display a video stream, which comes from server as byte array.
  Data in this array is h264 encoded image and i decode it with bytedeco javacpp-presets library in this way :

  public class DMDecoder {
  
  
  
  private static final String LOG_TAG = "DMDecoder";
  
  
  
  private AVCodec avCodec;
  
  private AVCodecContext avCodecContext;
  
  private AVFrame avFrame;
  
  private AVPacket avPacket;
  
  private boolean wasIFrame;
  
  private long IFrameTimeStampMs;
  
  private int maxFps;
  
  private int codecId;
  
  
  
  private DMDecoderCallback callback;
  
  
  
  public DMDecoder(DMDecoderCallback cb) {
  
      this.callback = cb;
  
      this.codecId = AV_CODEC_ID_H264;
  
      avcodec_register_all();
  
      restart();
  
  }
  
  
  
  public void restart() {
  
      stop();
  
      start();
  
  }
  
  
  
  public void stop() {
  
      frames = 0;
  
      if (avCodecContext != null) {
  
          avcodec_close(avCodecContext);
  
          avcodec_free_context(avCodecContext);
  
          avCodecContext = null;
  
      }
  
  
  
      if (avCodec != null) {
  
          av_free(avCodec);
  
          avCodec = null;
  
      }
  
  
  
      if (avFrame != null) {
  
          av_frame_free(avFrame);
  
          avFrame = null;
  
      }
  
  
  
      if (avPacket != null) {
  
          av_free_packet(avPacket);
  
          avPacket = null;
  
      }
  
  }
  
  
  
  public void start() {
  
      avCodec = avcodec_find_decoder(codecId);
  
  
  
      avCodecContext = avcodec_alloc_context3(avCodec);
  
      AVDictionary opts = new AVDictionary();
  
      avcodec_open2(avCodecContext, avCodec, opts);
  
  
  
      avFrame = av_frame_alloc();
  
      avPacket = new AVPacket();
  
      av_init_packet(avPacket);
  
  }
  
  
  
  public VideoFrame decode(byte[] data, int dataOffset, int dataSize) {
  
      avPacket.pts(AV_NOPTS_VALUE);
  
      avPacket.dts(AV_NOPTS_VALUE);
  
      avPacket.data(new BytePointer(data).position(dataOffset));
  
      avPacket.size(dataSize);
  
      avPacket.pos(-1);
  
  
  
      IntBuffer gotPicture = IntBuffer.allocate(1);
  
  
  
      int processedBytes = avcodec_decode_video2(
  
              avCodecContext, avFrame, gotPicture, avPacket);
  
  
  
      if (avFrame.width() == 0 || avFrame.height() == 0) return null;
  
  
  
      VideoFrame frame = new VideoFrame();
  
  
  
     frame.colorPlane0 = new byte[avFrame.width() * avFrame.height()];
  
     frame.colorPlane1 = new byte[avFrame.width() / 2 * avFrame.height() / 2];
  
     frame.colorPlane2 = new byte[avFrame.width() / 2 * avFrame.height() / 2];
  
  
  
      if (avFrame.data(0) != null) avFrame.data(0).get(frame.colorPlane0);
  
      if (avFrame.data(1) != null) avFrame.data(1).get(frame.colorPlane1);
  
      if (avFrame.data(2) != null) avFrame.data(2).get(frame.colorPlane2);
  
  
  
      frame.lineSize0 = avFrame.width();
  
      frame.lineSize1 = avFrame.width() / 2;
  
      frame.lineSize2 = avFrame.width() / 2;
  
  
  
      frame.width = avFrame.width();
  
      frame.height = avFrame.height();
  
  
  
      return frame;
  
    }
  
  }

  VideoFrame class is just simple POJO :

  public class VideoFrame {
  
      public byte[] colorPlane0;
  
      public byte[] colorPlane1;
  
      public byte[] colorPlane2;
  
      public int lineSize0;
  
      public int lineSize1;
  
      public int lineSize2;
  
      public int width;
  
      public int height;
  
      public long presentationTime;
  
  }

  After decoding i send this frame to my GLRenderer class

  public class GLRenderer implements GLSurfaceView.Renderer {
  
  
  
      private static final String LOG_TAG = "GLRenderer";
  
  
  
      private TexturePlane plane;
  
  
  
      private ConcurrentLinkedQueue<videoframe> frames;
  
      private int maxFps = 30;
  
      private VideoFrame currentFrame;
  
      private long startTime, endTime;
  
      private int viewWidth, viewHeight;
  
      private boolean isFirstFrameProcessed;
  
  
  
      public GLRenderer(int viewWidth, int viewHeight) {
  
          frames = new ConcurrentLinkedQueue&lt;>();
  
          this.viewWidth = viewWidth;
  
          this.viewHeight = viewHeight;
  
      }
  
  
  
      // mMVPMatrix is an abbreviation for "Model View Projection Matrix"
  
      private final float[] mMVPMatrix = new float[16];
  
      private final float[] mProjectionMatrix = new float[16];
  
      private final float[] mViewMatrix = new float[16];
  
  
  
      @Override
  
  
  
      public void onSurfaceCreated(GL10 unused, EGLConfig config) {
  
          // Set the background frame color
  
          GLES20.glClearColor(0.1f, 0.1f, 0.1f, 1.0f);
  
  
  
          plane = new TexturePlane();
  
      }
  
  
  
      public void setMaxFps(int maxFps) {
  
          this.maxFps = maxFps;
  
      }
  
  
  
      @Override
  
      public void onDrawFrame(GL10 unused) {
  
  
  
  
  
          // Draw background color
  
          GLES20.glClear(GLES20.GL_COLOR_BUFFER_BIT | GLES20.GL_DEPTH_BUFFER_BIT);
  
  
  
          // Set the camera position (View matrix)
  
          Matrix.setLookAtM(mViewMatrix, 0, 0, 0, -3, 0f, 0f, 0f, 0f, 1.0f, 0.0f);
  
  
  
          // Calculate the projection and view transformation
  
          Matrix.multiplyMM(mMVPMatrix, 0, mProjectionMatrix, 0, mViewMatrix, 0);
  
  
  
          if (!isFirstFrameProcessed) checkViewPort(viewWidth, viewHeight);
  
  
  
          if (maxFps > 0 &amp;&amp; startTime > 0) {
  
              endTime = System.currentTimeMillis();
  
              long time = endTime - startTime;
  
              //
  
              long wantedTime = 1000 / maxFps;
  
              //
  
              long wait;
  
              if (time &lt; wantedTime) {
  
                  wait = wantedTime - time;
  
                  //
  
                  try {
  
                      Thread.sleep(wait);
  
                  } catch (InterruptedException e) {
  
                      Log.e(LOG_TAG, "thread interrupted exception");
  
                  }
  
              }
  
          }
  
          startTime = System.currentTimeMillis();
  
          tick();
  
          plane.draw(mMVPMatrix);
  
      }
  
  
  
      private void updateFrame(VideoFrame frame) {
  
          plane.updateTexture(frame.colorPlane0, frame.width, frame.height, 0);
  
          plane.updateTexture(frame.colorPlane1, frame.width / 2, frame.height / 2, 1);
  
          plane.updateTexture(frame.colorPlane2, frame.width / 2, frame.height / 2, 2);
  
          plane.setTextureWidth(frame.width);
  
          plane.setTextureHeight(frame.height);
  
      }
  
  
  
      private void tick() {
  
  
  
          if (frames.isEmpty()) return;
  
  
  
          VideoFrame frame = frames.peek();
  
          if (frame == null) return;
  
  
  
          long tms = System.currentTimeMillis();
  
          if (frame.presentationTime &lt;= tms) {
  
              updateFrame(frame);
  
              currentFrame = frame;
  
              frames.remove(frame);
  
          }
  
      }
  
  
  
      @Override
  
      public void onSurfaceChanged(GL10 unused, int width, int height) {
  
          checkViewPort(width, height);
  
          viewWidth = width;
  
          viewHeight = height;
  
          plane.setTextureWidth(width);
  
          plane.setTextureHeight(height);
  
      }
  
  
  
      private void checkViewPort(int width, int height) {
  
          float viewRatio = (float) width / height;
  
          if (currentFrame != null) {
  
              float targetRatio = (float) currentFrame.width / currentFrame.height;
  
              int x, y, newWidth, newHeight;
  
              if (targetRatio > viewRatio) {
  
                  newWidth = width;
  
                  newHeight = (int) (width / targetRatio);
  
                  x = 0;
  
                  y = (height - newHeight) / 2;
  
              } else {
  
                  newHeight = height;
  
                  newWidth = (int) (height * targetRatio);
  
                  y = 0;
  
                  x = (width - newWidth) / 2;
  
              }
  
              GLES20.glViewport(x, y, newWidth, newHeight);
  
          } else {
  
              GLES20.glViewport(0, 0, width, height);
  
          }
  
  
  
          Matrix.frustumM(mProjectionMatrix, 0, 1, -1, -1, 1, 3, 4);
  
      }
  
  
  
      public void addFrame(VideoFrame frame) {
  
          if (frame != null) {
  
              frames.add(frame);
  
          }
  
      }
  
  }
  
  </videoframe>

  GLRenderer works with simple openGL polygon, on which i draw all textures

      public class TexturePlane {
  
  
  
      private static final String LOG_TAG = "TexturePlane";
  
  
  
      private final String vertexShaderCode = "" +
  
      "uniform mat4 uMVPMatrix;" +
  
      "attribute vec4 vPosition;" +
  
      "attribute vec2 a_TexCoordinate;" +
  
      "varying vec2 v_TexCoordinate;" +
  
  
  
      "void main() {" +
  
      "  gl_Position = uMVPMatrix * vPosition;" +
  
      "  v_TexCoordinate = a_TexCoordinate;" +
  
      "}";
  
  
  
      private final String fragmentShaderCode = "" +
  
      "precision mediump float;" +
  
      "varying vec2 v_TexCoordinate;" +
  
      "uniform sampler2D s_texture_y;" +
  
      "uniform sampler2D s_texture_u;" +
  
      "uniform sampler2D s_texture_v;" +
  
  
  
      "void main() {" +
  
      "   float y = texture2D(s_texture_y, v_TexCoordinate).r;" +
  
      "   float u = texture2D(s_texture_u, v_TexCoordinate).r - 0.5;" +
  
      "   float v = texture2D(s_texture_v, v_TexCoordinate).r - 0.5;" +
  
  
  
      "   float r = y + 1.13983 * v;" +
  
      "   float g = y - 0.39465 * u - 0.58060 * v;" +
  
      "   float b = y + 2.03211 * u;" +
  
  
  
      "   gl_FragColor = vec4(r, g, b, 1.0);" +
  
  
  
      "}";
  
  
  
      private final FloatBuffer vertexBuffer;
  
      private final FloatBuffer textureBuffer;
  
      private final ShortBuffer drawListBuffer;
  
      private final int mProgram;
  
      private int mPositionHandle;
  
      private int mMVPMatrixHandle;
  
  
  
          // number of coordinates per vertex in this array
  
      private static final int COORDS_PER_VERTEX = 3;
  
      private static final int COORDS_PER_TEXTURE = 2;
  
  
  
      private static float squareCoords[] = {
  
          -1f, 1f, 0.0f,
  
          -1f, -1f, 0.0f,
  
          1f, -1f, 0.0f,
  
          1f, 1f, 0.0f
  
      };
  
  
  
      private static float uvs[] = {
  
          0.0f, 0.0f,
  
          0.0f, 1.0f,
  
          1.0f, 1.0f,
  
          1.0f, 0.0f
  
      };
  
  
  
      private final short drawOrder[] = {0, 1, 2, 0, 2, 3}; // order to draw vertices
  
      private final int vertexStride = COORDS_PER_VERTEX * 4; // 4 bytes per vertex
  
  
  
      private int textureWidth = 640;
  
      private int textureHeight = 480;
  
  
  
      private int yTextureUniformHandle;
  
      private int uTextureUniformHandle;
  
      private int vTextureUniformHandle;
  
  
  
      private int yTextureHandle;
  
      private int uTextureHandle;
  
      private int vTextureHandle;
  
  
  
      private int mTextureCoordinateHandle;
  
  
  
      public void setTextureWidth(int textureWidth) {
  
          this.textureWidth = textureWidth;
  
      }
  
  
  
      public int getTextureWidth() {
  
          return textureWidth;
  
      }
  
  
  
      public void setTextureHeight(int textureHeight) {
  
          this.textureHeight = textureHeight;
  
      }
  
  
  
      public int getTextureHeight() {
  
          return textureHeight;
  
      }
  
  
  
      /**
  
       * Sets up the drawing object data for use in an OpenGL ES context.
  
       */
  
      public TexturePlane() {
  
              // initialize vertex byte buffer for shape coordinates
  
          ByteBuffer bb = ByteBuffer.allocateDirect(squareCoords.length * 4);
  
          bb.order(ByteOrder.nativeOrder());
  
          vertexBuffer = bb.asFloatBuffer();
  
          vertexBuffer.put(squareCoords);
  
          vertexBuffer.position(0);
  
  
  
              // initialize byte buffer for the draw list
  
          ByteBuffer dlb = ByteBuffer.allocateDirect(drawOrder.length * 2);
  
          dlb.order(ByteOrder.nativeOrder());
  
          drawListBuffer = dlb.asShortBuffer();
  
          drawListBuffer.put(drawOrder);
  
          drawListBuffer.position(0);
  
  
  
              // initialize byte buffer for the draw list
  
          ByteBuffer tbb = ByteBuffer.allocateDirect(uvs.length * 4);
  
          tbb.order(ByteOrder.nativeOrder());
  
          textureBuffer = tbb.asFloatBuffer();
  
          textureBuffer.put(uvs);
  
          textureBuffer.position(0);
  
  
  
              mProgram = GLES20.glCreateProgram();             // create empty OpenGL Program
  
              compileShaders();
  
              setupTextures();
  
          }
  
  
  
          public void setupTextures() {
  
              yTextureHandle = setupTexture(null, textureWidth, textureHeight, 0);
  
              uTextureHandle = setupTexture(null, textureWidth, textureHeight, 1);
  
              vTextureHandle = setupTexture(null, textureWidth, textureHeight, 2);
  
          }
  
  
  
          public int setupTexture(ByteBuffer data, int width, int height, int index) {
  
              final int[] textureHandle = new int[1];
  
  
  
              GLES20.glGenTextures(1, textureHandle, 0);
  
  
  
              if (textureHandle[0] != 0) {
  
                      // Bind to the texture in OpenGL
  
                  GLES20.glActiveTexture(GLES20.GL_TEXTURE0 + index);
  
                  GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle[0]);
  
  
  
                  updateTexture(data, width, height, index);
  
  
  
                      // Set filtering
  
                  GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
  
                  GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_LINEAR);
  
  
  
                      // Set wrapping mode
  
                  GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_REPEAT);
  
                  GLES20.glTexParameterf(GLES20.GL_TEXTURE_2D, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_REPEAT);
  
              }
  
  
  
              if (textureHandle[0] == 0) {
  
                  Log.e(LOG_TAG, "Error loading texture.");
  
              }
  
  
  
              return textureHandle[0];
  
          }
  
  
  
          public void updateTexture(byte[] data, int width, int height, int index) {
  
  
  
              if (data == null) {
  
                  if (width == 0 || height == 0) {
  
                      width = textureWidth;
  
                      height = textureHeight;
  
                  }
  
  
  
                  data = new byte[width * height];
  
                  if (index == 0) {
  
                      Arrays.fill(data, y);
  
                  } else if (index == 1) {
  
                      Arrays.fill(data, u);
  
                  } else {
  
                      Arrays.fill(data, v);
  
                  }
  
              } 
  
  
  
              byteBuffer.wrap(data);
  
              byteBuffer.position(0);
  
  
  
              GLES20.glActiveTexture(GLES20.GL_TEXTURE0 + index);
  
  
  
              GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_LUMINANCE,
  
                  width, height, 0, GLES20.GL_LUMINANCE, GLES20.GL_UNSIGNED_BYTE, byteBuffer);
  
          }
  
  
  
          private void compileShaders() {
  
              // prepare shaders and OpenGL program
  
              int vertexShader = loadShader(
  
                  GLES20.GL_VERTEX_SHADER,
  
                  vertexShaderCode);
  
              int fragmentShader = loadShader(
  
                  GLES20.GL_FRAGMENT_SHADER,
  
                  fragmentShaderCode);
  
  
  
              GLES20.glAttachShader(mProgram, vertexShader);   // add the vertex shader to program
  
              GLES20.glAttachShader(mProgram, fragmentShader); // add the fragment shader to program
  
              GLES20.glLinkProgram(mProgram);                  // create OpenGL program executables
  
              checkGlError("glLinkProgram");
  
  
  
              // Add program to OpenGL environment
  
              GLES20.glUseProgram(mProgram);
  
  
  
              mPositionHandle = GLES20.glGetAttribLocation(mProgram, "vPosition");
  
              mTextureCoordinateHandle = GLES20.glGetAttribLocation(mProgram, "a_TexCoordinate");
  
  
  
              GLES20.glEnableVertexAttribArray(mPositionHandle);
  
              GLES20.glEnableVertexAttribArray(mTextureCoordinateHandle);
  
  
  
              yTextureUniformHandle = GLES20.glGetUniformLocation(mProgram, "s_texture_y");
  
              uTextureUniformHandle = GLES20.glGetUniformLocation(mProgram, "s_Texture_u");
  
              vTextureUniformHandle = GLES20.glGetUniformLocation(mProgram, "s_Texture_v");
  
  
  
              mMVPMatrixHandle = GLES20.glGetUniformLocation(mProgram, "uMVPMatrix");
  
              checkGlError("glGetUniformLocation");
  
          }
  
  
  
      /**
  
       * Utility method for compiling a OpenGL shader.
  
       * <p></p>
  
       * <p><strong>Note:</strong> When developing shaders, use the checkGlError()
  
       * method to debug shader coding errors.</p>
  
       *
  
       * @param type       - Vertex or fragment shader type.
  
       * @param shaderCode - String containing the shader code.
  
       * @return - Returns an id for the shader.
  
       */
  
      public int loadShader(int type, String shaderCode) {
  
  
  
              // create a vertex shader type (GLES20.GL_VERTEX_SHADER)
  
              // or a fragment shader type (GLES20.GL_FRAGMENT_SHADER)
  
          int shader = GLES20.glCreateShader(type);
  
  
  
              // add the source code to the shader and compile it
  
          GLES20.glShaderSource(shader, shaderCode);
  
          GLES20.glCompileShader(shader);
  
  
  
          return shader;
  
      }
  
  
  
      /**
  
       * Utility method for debugging OpenGL calls. Provide the name of the call
  
       * just after making it:
  
       * <p></p>
  
       * <pre>
  
       * mColorHandle = GLES20.glGetUniformLocation(mProgram, "vColor");
  
       * MyGLRenderer.checkGlError("glGetUniformLocation");</pre>
  
       *
  
       * If the operation is not successful, the check throws an error.
  
       *
  
       * @param glOperation - Name of the OpenGL call to check.
  
       */
  
      public void checkGlError(String glOperation) {
  
          int error;
  
          String errorString;
  
          while ((error = GLES20.glGetError()) != GLES20.GL_NO_ERROR) {
  
              errorString = GLU.gluErrorString(error);
  
              String message = glOperation + ": glError " + error + ": " + errorString;
  
              Log.e(LOG_TAG, message);
  
              throw new RuntimeException(message);
  
          }
  
      }
  
  
  
      public void draw(float[] mvpMatrix) {
  
  
  
              // Prepare the triangle coordinate data
  
          GLES20.glVertexAttribPointer(
  
              mPositionHandle, COORDS_PER_VERTEX,
  
              GLES20.GL_FLOAT, false,
  
              vertexStride, vertexBuffer);
  
  
  
          GLES20.glVertexAttribPointer(
  
              mTextureCoordinateHandle, COORDS_PER_TEXTURE,
  
              GLES20.GL_FLOAT, false,
  
              0, textureBuffer);
  
  
  
          GLES20.glUniformMatrix4fv(mMVPMatrixHandle, 1, false, mvpMatrix, 0);
  
          checkGlError("glUniformMatrix4fv");
  
  
  
          GLES20.glUniform1i(yTextureUniformHandle, 0);
  
          GLES20.glUniform1i(uTextureUniformHandle, 1);
  
          GLES20.glUniform1i(vTextureUniformHandle, 2);
  
  
  
              // Draw the square
  
          GLES20.glDrawElements(
  
              GLES20.GL_TRIANGLES, drawOrder.length,
  
              GLES20.GL_UNSIGNED_SHORT, drawListBuffer);
  
      }
  
  } 

  But i have a problem there. My GL surface display image with wrong colors. image

  What i’m doing wrong ?

  UPDATE :

  As Ronald S. Bultje say, i added glBindTexture(...) function in my code. And now updateTexture(...) method looks like this :

  public void updateTexture(byte[] data, int width, int height, int index) {
  
  
  
      if (data == null) {
  
          if (width == 0 || height == 0) {
  
              width = textureWidth;
  
              height = textureHeight;
  
          }
  
  
  
          data = new byte[width * height];
  
          if (index == 0) {
  
              Arrays.fill(data, y);
  
          } else if (index == 1) {
  
              Arrays.fill(data, u);
  
          } else {
  
              Arrays.fill(data, v);
  
          }
  
      } 
  
  
  
      byteBuffer.wrap(data);
  
      byteBuffer.position(0);
  
  
  
      GLES20.glActiveTexture(GLES20.GL_TEXTURE0 + index);
  
  
  
      int textureHandle = index == 0 ? yTextureHandle : index == 1 ? uTextureHandle : vTextureHandle;
  
      GLES20.glBindTexture(GLES20.GL_TEXTURE_2D, textureHandle);
  
  
  
      GLES20.glTexImage2D(GLES20.GL_TEXTURE_2D, 0, GLES20.GL_LUMINANCE,
  
          width, height, 0, GLES20.GL_LUMINANCE, GLES20.GL_UNSIGNED_BYTE, byteBuffer);
  
  }

• how to convert mp4 to webm file using ffmpeg in php on centos

  19 mai 2015, par intrepid web

  i have done installation. after then i have using following code to convert mp4 to webm using ffmpeg on centos.

  but it does not convert and also didn’t throw any error.what is wrong with my code else am i forgot anythink in installation.

  Thanks Anvanced

  Webm convertion Code

  ffmpeg.exe -i "blank.mp4" -acodec libvorbis -b:a 96k -ac 2 -vcodec libvpx -b:v 400k -f webm -s 384x216 "blank.webm"