在视频上添加水印
我创建了一个应用，该应用可以录制10秒无声音的摄像机视频。那就是程序代码的一部分：
...
MediaCodec mMediaCodec = MediaCodec.createEncoderByType("video/avc");
mMediaCodec.configure(mMediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
Surface mSurface = mMediaCodec.createInputSurface();
EGLDisplay mEGLDisplay = EGL14.eglGetDisplay(EGL14.EGL_DEFAULT_DISPLAY);
int[] e = new int[2];
EGL14.eglInitialize(mEGLDisplay, e, 0, e, 1);
EGLConfig[] mEGLConfig = new EGLConfig[1];
EGL14.eglChooseConfig(mEGLDisplay, new int[]{EGL14.EGL_RED_SIZE, 8, EGL14.EGL_GREEN_SIZE, 8, EGL14.EGL_BLUE_SIZE, 8, EGL14.EGL_ALPHA_SIZE, 8, EGL14.EGL_RENDERABLE_TYPE, EGL14.EGL_OPENGL_ES2_BIT, 12610, 1, EGL14.EGL_NONE}, 0, mEGLConfig, 0, 1, new int[1], 0);
EGLContext mEGLContext = EGL14.eglCreateContext(mEGLDisplay, mEGLConfig[0], EGL14.EGL_NO_CONTEXT, new int[]{EGL14.EGL_CONTEXT_CLIENT_VERSION, 2, EGL14.EGL_NONE}, 0);
EGLSurface mEGLSurface = EGL14.eglCreateWindowSurface(mEGLDisplay, mEGLConfig[0], mSurface, new int[]{EGL14.EGL_NONE}, 0);
mMediaCodec.start();
MediaMuxer mMediaMuxer = new MediaMuxer(new File(Environment.getExternalStorageDirectory(), "ipcamera.mp4").getPath(), OutputFormat.MUXER_OUTPUT_MPEG_4);
EGL14.eglMakeCurrent(mEGLDisplay, mEGLSurface, mEGLSurface, mEGLContext);
FloatBuffer mFloatBuffer = ByteBuffer.allocateDirect(80).order(ByteOrder.nativeOrder()).asFloatBuffer();
mFloatBuffer.put(new float[]{-1, -1, 0, 0, 0, 1, -1, 0, 1, 0, -1, 1, 0, 0, 1, 1, 1, 0, 1, 1}).position(0);
float[] sm1 = new float[16], sm2 = new float[16];
Matrix.setIdentityM(sm1, 0); int program = GLES20.glCreateProgram(), f = GLES20.glCreateShader(GLES20.GL_VERTEX_SHADER), params[] = new int[1];
GLES20.glShaderSource(f, "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"); GLES20.glCompileShader(f);
GLES20.glGetShaderiv(f, GLES20.GL_COMPILE_STATUS, params, 0); GLES20.glAttachShader(program, f); GLES20.glShaderSource(f = GLES20.glCreateShader(GLES20.GL_FRAGMENT_SHADER), "#extension GL_OES_EGL_image_external : requiren" + "precision mediump float;n" + "varying vec2 vTextureCoord;n" + "uniform samplerExternalOES sTexture;n" + "void main() {n" + " gl_FragColor = texture2D(sTexture, vTextureCoord);n" + "}n");
GLES20.glCompileShader(f);
GLES20.glGetShaderiv(f, GLES20.GL_COMPILE_STATUS, params, 0); GLES20.glAttachShader(program, f);
GLES20.glLinkProgram(program);
GLES20.glGetProgramiv(program, GLES20.GL_LINK_STATUS, params, 0);
if (params[0] != GLES20.GL_TRUE) GLES20.glDeleteProgram(program);
int maPositionHandle = GLES20.glGetAttribLocation(program, "aPosition"), maTextureHandle = GLES20.glGetAttribLocation(program, "aTextureCoord"), muMVPMatrixHandle = GLES20.glGetUniformLocation(program, "uMVPMatrix"), muSTMatrixHandle = GLES20.glGetUniformLocation(program, "uSTMatrix"), texName[] = new int[1];
GLES20.glGenTextures(1, texName, 0);
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, texName[0]);
GLES20.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MIN_FILTER, GLES20.GL_NEAREST);
GLES20.glTexParameterf(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_MAG_FILTER, GLES20.GL_LINEAR);
GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_S, GLES20.GL_CLAMP_TO_EDGE);
GLES20.glTexParameteri(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, GLES20.GL_TEXTURE_WRAP_T, GLES20.GL_CLAMP_TO_EDGE);
(mSurfaceTexture = new SurfaceTexture(texName[0])).setOnFrameAvailableListener(this);
mCamera.setPreviewTexture(mSurfaceTexture);
mCamera.startPreview();
long a = System.currentTimeMillis();
BufferInfo mBufferInfo = new BufferInfo();
boolean b = true;
int c, d = 0;
do {
synchronized (VideoRecording.this.b) {
if (!VideoRecording.this.b) continue; else VideoRecording.this.b = false;
}
mSurfaceTexture.updateTexImage();
mSurfaceTexture.getTransformMatrix(sm1);
GLES20.glClearColor(0, 0, 0, 1);
GLES20.glClear(GLES20.GL_DEPTH_BUFFER_BIT | GLES20.GL_COLOR_BUFFER_BIT);
GLES20.glUseProgram(program);
GLES20.glActiveTexture(GLES20.GL_TEXTURE0);
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, texName[0]);
mFloatBuffer.position(0);
GLES20.glVertexAttribPointer(maPositionHandle, 3, GLES20.GL_FLOAT, false, 20, mFloatBuffer);
GLES20.glEnableVertexAttribArray(maPositionHandle);
mFloatBuffer.position(3);
GLES20.glVertexAttribPointer(maTextureHandle, 2, GLES20.GL_FLOAT, false, 20, mFloatBuffer);
GLES20.glEnableVertexAttribArray(maTextureHandle);
Matrix.setIdentityM(sm2, 0);
GLES20.glUniformMatrix4fv(muMVPMatrixHandle, 1, false, sm2, 0);
GLES20.glUniformMatrix4fv(muSTMatrixHandle, 1, false, sm1, 0);
GLES20.glDrawArrays(GLES20.GL_TRIANGLE_STRIP, 0, 4);
GLES20.glBindTexture(GLES11Ext.GL_TEXTURE_EXTERNAL_OES, 0);
EGL14.eglSwapBuffers(mEGLDisplay, mEGLSurface);
if (!(b = System.currentTimeMillis() - a < 10000)) mMediaCodec.signalEndOfInputStream();
while ((c = mMediaCodec.dequeueOutputBuffer(mBufferInfo, 10000)) != MediaCodec.INFO_TRY_AGAIN_LATER || !b) {
if (c == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
d = mMediaMuxer.addTrack(mMediaCodec.getOutputFormat());
mMediaMuxer.start();
} else if (c >= 0) {
if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) mBufferInfo.size = 0; else mMediaMuxer.writeSampleData(d, (ByteBuffer) mMediaCodec.getOutputBuffers()[c].position(mBufferInfo.offset).limit(mBufferInfo.offset + mBufferInfo.size), mBufferInfo);
mMediaCodec.releaseOutputBuffer(c, false);
if ((mBufferInfo.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) break;
}
}
} while (b);
mMediaCodec.stop();
mMediaCodec.release();
EGL14.eglMakeCurrent(mEGLDisplay, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_SURFACE, EGL14.EGL_NO_CONTEXT);
EGL14.eglDestroySurface(mEGLDisplay, mEGLSurface);
EGL14.eglDestroyContext(mEGLDisplay, mEGLContext);
EGL14.eglReleaseThread();
EGL14.eglTerminate(mEGLDisplay);
mSurface.release();
...
@Override
public void onFrameAvailable(SurfaceTexture surfaceTexture) {
synchronized (VideoRecording.this.b) {
VideoRecording.this.b = true;
}
}
实际上，我从流行的CameraToMpegTest.java导入了所有代码，并试图通过将很多代码替换为一个块（在上方显示）来使其最大程度地简化。我使用Java语言编程已有3年，但尝试首先使用OpenGL Android库。我已经阅读了很多有关此主题的教程，但是我发现关于通过MediaMuxer和内置OpenGL库录制视频的信息很少。只有Grafika项目包含有用的东西。如何在具有指定坐标的视频上添加水印（例如R.mipmap.ic_launcher）？在互联网上，我发现的信息不多，我在一些论坛上看到了以下代码：
Bitmap bitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);
//Generate one texture pointer...
gl.glGenTextures(1, textures, 0);
//...and bind it to our array
gl.glBindTexture(GL10.GL_TEXTURE_2D, textures[0]);
//Create Nearest Filtered Texture gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MIN_FILTER, GL10.GL_NEAREST);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_MAG_FILTER, GL10.GL_LINEAR);
//Different possible texture parameters, e.g. GL10.GL_CLAMP_TO_EDGE
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_S, GL10.GL_REPEAT);
gl.glTexParameterf(GL10.GL_TEXTURE_2D, GL10.GL_TEXTURE_WRAP_T, GL10.GL_REPEAT);
//Use the Android GLUtils to specify a two-dimensional texture image from our bitmap
GLUtils.texImage2D(GL10.GL_TEXTURE_2D, 0, bitmap, 0);
//Clean up
bitmap.recycle();
但是我真的不知道该把代码放在哪里...我试图将其放在几乎所有地方，但是什么也没发生，或者我的视频已损坏。以及stackoverflow中的一个问题（我失去了一个链接），程序员们确认这件事需要两个GLES20程序...请告诉我在视频上添加水印的正确程序代码，以及我该在哪里放置它。也许甚至可以不使用OpenGL而使用MediaMuxer和MediaCodec来做到这一点？
不要为我提供不同的库，这些库不是内置的，例如FFMPEG。我必须通过内置的Android库来做到这一点。我的应用程序要求的最低API级别必须为18（Android 4.3.1）。
@NizaSiwale，这就是我所拥有的：
但是我想要这个：
1 个答案:
答案 0 :(得分：1)
您可以简单地使用MediaMuxer转换从相机获取的位图，然后在位图上添加水印
首先将回调添加到相机，然后将水印添加到位图
private byte[] currentFrame;
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
Size previewSize = camera.getParameters().getPreviewSize();
ByteArrayOutputStream baos = new ByteArrayOutputStream();
byte[] rawImage = null;
// Decode image from the retrieved buffer to JPEG
YuvImage yuv = new YuvImage(data, ImageFormat.NV21, previewSize.width, previewSize.height, null);
yuv.compressToJpeg(new Rect(0, 0, previewSize.width, previewSize.height), YOUR_JPEG_COMPRESSION, baos);
rawImage = baos.toByteArray();
Bitmap bitmap = BitmapFactory.decodeByteArray(rawImage, 0, rawImage.length);
currentFrame = getNV21(src.getWidth(), src.getHeight(), mark(bitmap, yourWatermark,watermarkLocation));
}
public Bitmap mark(Bitmap src, Bitmap watermark, Point location) {
int w = src.getWidth();
int h = src.getHeight();
Bitmap result = Bitmap.createBitmap(w, h, src.getConfig());
Canvas canvas = new Canvas(result);
canvas.drawBitmap(src, 0, 0, null);
canvas.drawBitmap(watermark, location.x, location.y, null);
return result;
}
byte [] getNV21(int inputWidth, int inputHeight, Bitmap scaled) {
int [] argb = new int[inputWidth * inputHeight];
scaled.getPixels(argb, 0, inputWidth, 0, 0, inputWidth, inputHeight);
byte [] yuv = new byte[inputWidth*inputHeight*3/2];
encodeYUV420SP(yuv, argb, inputWidth, inputHeight);
scaled.recycle();
return yuv;
}
void encodeYUV420SP(byte[] yuv420sp, int[] argb, int width, int height) {
final int frameSize = width * height;
int yIndex = 0;
int uvIndex = frameSize;
int a, R, G, B, Y, U, V;
int index = 0;
for (int j = 0; j < height; j++) {
for (int i = 0; i < width; i++) {
a = (argb[index] & 0xff000000) >> 24; // a is not used obviously
R = (argb[index] & 0xff0000) >> 16;
G = (argb[index] & 0xff00) >> 8;
B = (argb[index] & 0xff) >> 0;
// well known RGB to YUV algorithm
Y = ( ( 66 * R + 129 * G + 25 * B + 128) >> 8) + 16;
U = ( ( -38 * R - 74 * G + 112 * B + 128) >> 8) + 128;
V = ( ( 112 * R - 94 * G - 18 * B + 128) >> 8) + 128;
// NV21 has a plane of Y and interleaved planes of VU each sampled by a factor of 2
// meaning for every 4 Y pixels there are 1 V and 1 U. Note the sampling is every other
// pixel AND every other scanline.
yuv420sp[yIndex++] = (byte) ((Y < 0) ? 0 : ((Y > 255) ? 255 : Y));
if (j % 2 == 0 && index % 2 == 0) {
yuv420sp[uvIndex++] = (byte)((V<0) ? 0 : ((V > 255) ? 255 : V));
yuv420sp[uvIndex++] = (byte)((U<0) ? 0 : ((U > 255) ? 255 : U));
}
index ++;
}
}
}
之后，只需使用MediaMuxer从帧（位图）创建视频
private void prepareEncoder() {
try {
mBufferInfo = new MediaCodec.BufferInfo();
mediaCodec = MediaCodec.createEncoderByType(MIME_TYPE);
mediaFormat = MediaFormat.createVideoFormat(MIME_TYPE, WIDTH, HEIGHT);
mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, calcBitRate());
mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, FRAME_RATE);
if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.LOLLIPOP) {
mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420SemiPlanar);
}else{
mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT, MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Flexible);
}
//2130708361, 2135033992, 21
mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, IFRAME_INTERVAL);
final MediaFormat audioFormat = MediaFormat.createAudioFormat(MIME_TYPE_AUDIO, SAMPLE_RATE, 1);
audioFormat.setInteger(MediaFormat.KEY_AAC_PROFILE, MediaCodecInfo.CodecProfileLevel.AACObjectLC);
audioFormat.setInteger(MediaFormat.KEY_CHANNEL_MASK, AudioFormat.CHANNEL_IN_MONO);
audioFormat.setInteger(MediaFormat.KEY_BIT_RATE, BIT_RATE);
audioFormat.setInteger(MediaFormat.KEY_CHANNEL_COUNT, 1);
mediaCodec.configure(mediaFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mediaCodec.start();
mediaCodecForAudio = MediaCodec.createEncoderByType(MIME_TYPE_AUDIO);
mediaCodecForAudio.configure(audioFormat, null, null, MediaCodec.CONFIGURE_FLAG_ENCODE);
mediaCodecForAudio.start();
try {
String outputPath = new File(Environment.getExternalStorageDirectory(),
"test.mp4").toString();
mediaMuxer = new MediaMuxer(outputPath, MediaMuxer.OutputFormat.MUXER_OUTPUT_MPEG_4);
} catch (IOException ioe) {
throw new RuntimeException("MediaMuxer creation failed", ioe);
}
} catch (IOException e) {
e.printStackTrace();
}
}
private void bufferEncoder() {
runnable = new Runnable() {
@Override
public void run() {
prepareEncoder();
try {
while (mRunning) {
encode();
}
encode();
} finally {
release();
}
}
};
Thread thread = new Thread(runnable);
thread.start();
}
public void encode() {
while (true) {
if (!mRunning) {
break;
}
int inputBufIndex = mediaCodec.dequeueInputBuffer(TIMEOUT_USEC);
long ptsUsec = computePresentationTime(generateIndex);
if (inputBufIndex >= 0 && currentFrame!=null) {
byte[] input = currentFrame;
final ByteBuffer inputBuffer = mediaCodec.getInputBuffer(inputBufIndex);
inputBuffer.clear();
inputBuffer.put(input);
mediaCodec.queueInputBuffer(inputBufIndex, 0, input.length, ptsUsec, 0);
generateIndex++;
currentFrame =null;
}
int encoderStatus = mediaCodec.dequeueOutputBuffer(mBufferInfo, TIMEOUT_USEC);
if (encoderStatus == MediaCodec.INFO_TRY_AGAIN_LATER) {
// no output available yet
Log.d("CODEC", "no output from encoder available");
} else if (encoderStatus == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
// not expected for an encoder
MediaFormat newFormat = mediaCodec.getOutputFormat();
mTrackIndex = mediaMuxer.addTrack(newFormat);
mediaMuxer.start();
} else if (encoderStatus < 0) {
Log.i("CODEC", "unexpected result from encoder.dequeueOutputBuffer: " + encoderStatus);
} else if (mBufferInfo.size != 0) {
ByteBuffer encodedData = mediaCodec.getOutputBuffer(encoderStatus);
if (encodedData == null) {
Log.i("CODEC", "encoderOutputBuffer " + encoderStatus + " was null");
} else {
encodedData.position(mBufferInfo.offset);
encodedData.limit(mBufferInfo.offset + mBufferInfo.size);
mediaMuxer.writeSampleData(mTrackIndex, encodedData, mBufferInfo);
mediaCodec.releaseOutputBuffer(encoderStatus, false);
}
}
}
}
}
完成后，只需释放MediaMuxer，它将自动保存您的视频
private void release() {
if (mediaCodec != null) {
mediaCodec.stop();
mediaCodec.release();
mediaCodec = null;
Log.i("CODEC", "RELEASE CODEC");
}
if (mediaMuxer != null) {
mediaMuxer.stop();
mediaMuxer.release();
mediaMuxer = null;
Log.i("CODEC", "RELEASE MUXER");
}
}
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