LiveRTMP Android版demo中，通过使用AudioRecord录音，然后将每一帧数据通过MediaCodec编码成LATM格式音频，然后就发送给服务器就OK了。
AudioRecord的使用
public void startRecord() { try { init(); mAudioRecord.startRecording(); mMediaCodec.start(); final ByteBuffer[] inputBuffers = mMediaCodec.getInputBuffers(); mThread = new Thread(new Runnable() { @Override public void run() { Process.setThreadPriority(Process.THREAD_PRIORITY_AUDIO); int len = 0, bufferIndex = 0; try { while (!Thread.interrupted() && !stoped) { bufferIndex = mMediaCodec.dequeueInputBuffer(50000); if (bufferIndex >= 0) { inputBuffers[bufferIndex].clear(); len = mAudioRecord.read(inputBuffers[bufferIndex], BUFFER_SIZE); if (len == AudioRecord.ERROR_INVALID_OPERATION || len == AudioRecord.ERROR_BAD_VALUE) { mMediaCodec.queueInputBuffer(bufferIndex, 0, 0, 0, 0); } else { mMediaCodec.queueInputBuffer(bufferIndex, 0, len, 0, 0); } } } } catch (RuntimeException e) { Log.i(TAG, "record" + e.getMessage()); } } }, "AACRecoder"); mThread.start(); startEncode(); } catch (Exception e) { Log.e(TAG, "Record___Error!!!!!"); } } 在循环中通过mAudioRecord.read(inputBuffers[bufferIndex], BUFFER_SIZE)不断的读取音频，然后放入编码队列中去。 新开一个线程用来获取队列中的数据：
private void startEncode() { mBuffers = mMediaCodec.getOutputBuffers(); mBuffer=null; encodeThread = new Thread(new Runnable() { @Override public void run() { while (!Thread.interrupted() && !stoped) { try { if (mBuffer == null) { mBuffer = ByteBuffer.allocate(10240); while (!Thread.currentThread().isInterrupted() && !stoped) { mIndex = mMediaCodec.dequeueOutputBuffer(mBufferInfo, 50000); if (mIndex >= 0) { if (mBufferInfo.flags == MediaCodec.BUFFER_FLAG_CODEC_CONFIG) { continue; } mBuffer.clear(); mBuffer.position(0); mBuffers[mIndex].get(mBuffer.array(), 0, mBufferInfo.size); mBuffers[mIndex].clear(); mBuffer.position(mBuffer.position() + mBufferInfo.size); mBuffer.flip(); break; } else if (mIndex == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) { mBuffers = mMediaCodec.getOutputBuffers(); } else if (mIndex == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) { Log.v(TAG, "output format changed..."); } else if (mIndex == MediaCodec.INFO_TRY_AGAIN_LATER) { Log.v(TAG, "No buffer available..."); } else { Log.e(TAG, "Message: " + mIndex); } } } int size = mBufferInfo.size; byte[] buffer = new byte[size]; mBuffer.get(buffer); easyPusher.push(buffer,System.currentTimeMillis(), 0); if (mBuffer.position() >= size) { // read complete mMediaCodec.releaseOutputBuffer(mIndex, false); mBuffer = null; } } catch (RuntimeException e) { Log.i(TAG, "record" + e.getMessage()); } } } }, "AACEncoder"); encodeThread.start(); } LiveRTMP推送RTMP流时不需要添加ADTS头部。