if (inputIndex >= 0) {

                ByteBuffer buffer;
                if (Build.VERSION.SDK_INT < Build.VERSION_CODES.LOLLIPOP) {
                    buffer = m_codec.getInputBuffers()[inputIndex];
                    buffer.clear();
                } else {
                    buffer = m_codec.getInputBuffer(inputIndex);
                }
                if (buffer != null) {
                    buffer.put(videoBuffer, 0, videoBuffer.length);
                    m_codec.queueInputBuffer(inputIndex, 0, videoBuffer.length, 0, 0);
                }

            }

      //always return -1
     int outputBufferId = m_codec.dequeueOutputBuffer(info,TIMEOUT_USEC);