Nv21字节数据在android中保存为彩色H264格式
我从NV21字节数据中获取视频以使用下面的代码,并保存了它。H264格式扩展名,但我的视频背景没有颜色,我想制作彩色的,我保存的是H264格式的NV21字节数据,这可能是原因吗,我如何解决这个问题Nv21字节数据在android中保存为彩色H264格式,android,encoding,h.264,android-mediacodec,Android,Encoding,H.264,Android Mediacodec,我从NV21字节数据中获取视频以使用下面的代码,并保存了它。H264格式扩展名,但我的视频背景没有颜色,我想制作彩色的,我保存的是H264格式的NV21字节数据,这可能是原因吗,我如何解决这个问题 private void initCodec() { try { mMediaCodec = MediaCodec.createEncoderByType("video/avc"); } catch (IOException e) {
private void initCodec() {
try {
mMediaCodec = MediaCodec.createEncoderByType("video/avc");
} catch (IOException e) {
e.printStackTrace();
}
MediaFormat mediaFormat = MediaFormat.createVideoFormat("video/avc",
1280,
720);
mediaFormat.setInteger(MediaFormat.KEY_BIT_RATE, 125000);
mediaFormat.setInteger(MediaFormat.KEY_FRAME_RATE, 360); //video second
mediaFormat.setInteger(MediaFormat.KEY_COLOR_FORMAT,
MediaCodecInfo.CodecCapabilities.COLOR_FormatYUV420Planar);
/* mDestData = new byte[1280 * 720
* ImageFormat.getBitsPerPixel(ImageFormat.YV12) / 8];*/
mediaFormat.setInteger(MediaFormat.KEY_I_FRAME_INTERVAL, 5);
mMediaCodec.configure(mediaFormat,
null,
null,
MediaCodec.CONFIGURE_FLAG_ENCODE);
mMediaCodec.start();
}
编码NV21字节数据
//Video format H264
private synchronized void encode(byte[] data) {
ByteBuffer[] inputBuffers = mMediaCodec.getInputBuffers();
ByteBuffer[] outputBuffers = mMediaCodec.getOutputBuffers();
int inputBufferIndex = mMediaCodec.dequeueInputBuffer(-1);
if (inputBufferIndex >= 0) {
ByteBuffer inputBuffer = inputBuffers[inputBufferIndex];
inputBuffer.capacity();
inputBuffer.clear();
inputBuffer.put(data);
mMediaCodec.queueInputBuffer(inputBufferIndex, 0, data.length, 0, 0);
} else {
return;
}
MediaCodec.BufferInfo bufferInfo = new MediaCodec.BufferInfo();
int outputBufferIndex = mMediaCodec.dequeueOutputBuffer(bufferInfo, 0);
Log.i(TAG, "outputBufferIndex-->" + outputBufferIndex);
do {
if (outputBufferIndex >= 0) {
ByteBuffer outBuffer = outputBuffers[outputBufferIndex];
System.out.println("buffer info-->" + bufferInfo.offset + "--"
+ bufferInfo.size + "--" + bufferInfo.flags + "--"
+ bufferInfo.presentationTimeUs);
byte[] outData = new byte[bufferInfo.size];
outBuffer.get(outData);
try {
if (bufferInfo.offset != 0) {
fos.write(outData, bufferInfo.offset, outData.length
- bufferInfo.offset);
} else {
fos.write(outData, 0, outData.length);
}
fos.flush();
Log.i(TAG, "out data -- > " + outData.length);
mMediaCodec.releaseOutputBuffer(outputBufferIndex, false);
outputBufferIndex = mMediaCodec.dequeueOutputBuffer(bufferInfo,
0);
} catch (IOException e) {
e.printStackTrace();
}
} else if (outputBufferIndex == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
outputBuffers = mMediaCodec.getOutputBuffers();
} else if (outputBufferIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
MediaFormat format = mMediaCodec.getOutputFormat();
}
} while (outputBufferIndex >= 0);
}
我正在使用这种转换格式,它比旧的格式更好,但它不能提供真实的相机视图
public static byte[] YV12toYUV420Planar(byte[] input, byte[] output, int width, int height) {
final int frameSize = (width * height);
final int qFrameSize = frameSize/4;
System.arraycopy(input, 0, output, 0, frameSize); // Y
System.arraycopy(input, frameSize, output, frameSize + qFrameSize, qFrameSize); // Cr (V)
System.arraycopy(input, frameSize + qFrameSize, output, frameSize, qFrameSize); // Cb (U)
return output;
}
最后我打电话来了
private CameraProxy.CameraDataCallBack callBack = new CameraProxy.CameraDataCallBack() {
@Override
public void onDataBack(byte[] data, long length) {
// TODO Auto-generated method stub
Log.i(TAG, "length . " + length);
photo = new File(Environment.getExternalStorageDirectory().getAbsolutePath() + "/", "photo"+i+".jpg");
byte[]outpt = new byte[data.length];
byte[] datam = YV12toYUV420Planar(data,outpt,1280,720);
encode(datam);
}
这个功能解决了我的问题
public static byte[] NV21toYUV420Planar(byte[] input, byte[] output, int width, int height) {
final int frameSize = width * height;
final int qFrameSize = frameSize/4;
System.arraycopy(input, 0, output, 0, frameSize); // Y
byte v, u;
for (int i = 0; i < qFrameSize; i++) {
v = input[frameSize + i*2];
u = input[frameSize + i*2 + 1];
output[frameSize + i + qFrameSize] = v;
output[frameSize + i] = u;
}
return output;
}
公共静态字节[]NV21TOYUV420平面(字节[]输入,字节[]输出,整数宽度,整数高度){
最终整数帧大小=宽度*高度;
最终int qFrameSize=frameSize/4;
System.arraycopy(输入,0,输出,0,帧大小);//Y
字节v,u;
对于(int i=0;i
试试这个颜色format color\u format 32BitArgB8888我只有粉红色,我的设备是棒棒糖Api 21,color\u format 32BitArgB8888是Api 23这可能是你在输入格式中指定YUV420P作为颜色格式的原因,而NV21的等价物是YUV420SP(半平面)。不需要此方法,只需将颜色格式指定为color_FormatYUV420SemiPlanar即可。