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问题描述

我正在为公司项目开发JAVA RTP流应用程序,该应用程序应该能够加入多播服务器并接收RTP数据包.后来我使用H264解包器从NAL FU重新创建一个完整的帧(保持附加数据,直到设置了结束位和标记位"为止

I'm developing a JAVA RTP Streaming App for a company project, which should be capable of joining the Multicast Server and receive the RTP Packets.Later I use the H264 Depacketizer to recreate the a complete frame from the NAL FU (Keep append the data until End Bit & Marker Bit set )

我想在Android中解码并显示原始的h264视频字节流,因此,我目前正在使用配置了硬件解码器的MediaCodec类.

I want to decode and display a raw h264 video byte stream in Android and therefore I'm currently using the MediaCodec classes with Hardware Decoder configured.

该应用程序已启动并正在为Jeallybean(API 17)运行.我需要解码的各种分辨率是:
480P at 30/60 FPS
720P/I at 30/60 FPS
1080P/I,速度为30/60 FPS

The Application is Up and running for the Jeallybean (API 17). Various Resolutions which I need to decodes are :
480P at 30/60 FPS
720P/I at 30/60 FPS
1080P/I at 30/60 FPS

最近,由于系统升级,我们正在将应用程序移植到Android L版本5.0.2.我的应用无法播放720p @ 60fps和1080p @ 60fps等高分辨率视频.

Recently, Due to System Upgrade we are porting the App to Android L Version 5.0.2. My App is not capable of playing the high resolutions videos like 720p@60fps and 1080p@60fps.

出于调试目的,我开始将大小从转储文件中的基本H264帧馈送到MediaCodec,并发现视频出现滞后.
我使用的示例视频上有时间戳,并且在渲染视频"中进行1秒所需的实际时间似乎更多.
以下是我的示例代码和指向示例视频的链接
h264视频 https://www.dropbox.com/s/cocjhhovihm8q25/dump60fps .h264?dl = 0
h264 framesize https://www.dropbox.com/s/r146d5zederrne1/dump60fps .size?dl = 0

For the debugging purpose I started feeding the Elementary H264 Frames with size from the dump file to MediaCodec and found out the Video is Lagging.
There are timestamps on the sample video I used and it seems the actual time taken to proceed by 1 sec in Rendered Video is more
Below is my sample code and links to sample video
h264 video https://www.dropbox.com/s/cocjhhovihm8q25/dump60fps.h264?dl=0
h264 framesize https://www.dropbox.com/s/r146d5zederrne1/dump60fps.size?dl=0

这也是我对stackoverflow的问题,请允许我接受错误的代码格式和直接引用.

Also as this is my question on stackoverflow, Please bear with me on Bad code formatting and Direct references.

public class MainActivity extends Activity {

    static final String TAG = "MainActivity";
    private PlayerThread mPlayer = null;
    private static final String MIME_TYPE = "video/avc";


    private byte[] mSPSPPSFrame = new byte [3000];
    private byte[] sps = new byte[37];
    File videoFile = null;
    File videoFile1 = null;
    TextView tv ;

    FileInputStream videoFileStream = null;
    FileInputStream videoFileStream1 = null;
    int[] tall = null ;
    SpeedControlCallback mspeed = new SpeedControlCallback();

    int mStreamLen = 0;
    FrameLayout game;
    RelativeLayout rl ;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);


        //mVideoSurfaceView = (SurfaceView)findViewById(R.id.videoSurfaceView);
        setContentView(R.layout.activity_main);

        SurfaceView first = (SurfaceView) findViewById(R.id.firstSurface);
        first.getHolder().addCallback(new SurfaceHolder.Callback() {
            @Override
            public void surfaceCreated(SurfaceHolder surfaceHolder) {
                Log.d(TAG, "First surface created!");
            }

            @Override
            public void surfaceChanged(SurfaceHolder surfaceHolder, int i, int i2, int i3) {
                Log.d(TAG, "surfaceChanged()");
                surfaceHolder.getSurface();

                if (mPlayer == null) {
                    mPlayer = new PlayerThread(surfaceHolder.getSurface());
                    mPlayer.start();

                }

            }

            @Override
            public void surfaceDestroyed(SurfaceHolder surfaceHolder) {
                Log.d(TAG, "First surface destroyed!");
            }
        });

        tv = (TextView) findViewById(R.id.textview);

        videoFile = new File("/data/local/tmp/dump60fps.h264");
        videoFile1 = new File("/data/local/tmp/dump60fps.size");

    }

    private class PlayerThread extends Thread {
        private Surface surface;

        public PlayerThread(Surface surface) {
            this.surface = surface;
        }

        @Override
        public void run() {
            try {
                decodeVideo(0, 1920,1080, 50, surface);
            } catch (IOException e) {
                e.printStackTrace();
            } catch (InterruptedException e) {
                e.printStackTrace();
            } catch (Throwable e) {
                e.printStackTrace();
            }

        }
    }




    private void decodeVideo(int testinput, int width, int height,
            int threshold, Surface surface) throws Throwable {

        MediaCodec codec = null;
        MediaFormat mFormat;
        final long kTimeOutUs = 10000;
        MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
        boolean sawInputEOS = false;
        boolean sawOutputEOS = false;
        MediaFormat oformat = null;
        int errors = -1;
        long presentationTimeUs = 0L;
        boolean mVideoStart = false;
        byte[] byteArray = new byte[65525*5*3];
        int i;
        int sizeInBytes = 0, index, sampleSize = 0;


        try {

            byte[] bytes = new byte[(int) videoFile1.length()];
            FileInputStream fis = new FileInputStream(videoFile1);
            fis.read(bytes);
            fis.close();
            String[] valueStr = new String(bytes).trim().split("\\s+");
            tall = new int[valueStr.length];
            mStreamLen = valueStr.length;
            Log.e(TAG, "++++++ Total Frames ++++++"+mStreamLen);
            for ( i = 0; i < valueStr.length; i++) {
                tall[i] = Integer.parseInt(valueStr[i]);
            }
        } catch (IOException e1) {
            e1.printStackTrace();
        }

        index =1;
        try {
            videoFileStream = new FileInputStream(videoFile);
        } catch (FileNotFoundException e1) {
            e1.printStackTrace();
        }


        System.currentTimeMillis();

        if (mVideoStart == false) {
            try {
                sizeInBytes = videoFileStream.read(mSPSPPSFrame, 0,37);
                Log.e(TAG, "VideoEngine configure ."+sizeInBytes);
                //for (i = 0 ; i < sizeInBytes; i++){
                //  Log.e(TAG, "VideoEngine  ."+mSPSPPSFrame[i]);}



            } catch (IOException e1) {
                e1.printStackTrace();
            }
            sampleSize = sizeInBytes;
            index++;
            index++;

            mFormat = MediaFormat.createVideoFormat(MIME_TYPE, 1920,1080);
            mFormat.setByteBuffer("csd-0", ByteBuffer.wrap( mSPSPPSFrame,0, sizeInBytes));
            codec = MediaCodec.createDecoderByType(MIME_TYPE);

            codec.configure(mFormat, surface /*surface*/ , null /* crypto */, 0 /* flags */);
            codec.start();
            codec.getInputBuffers();
            codec.getOutputBuffers();

        }

        //  index = 0;
        while (!sawOutputEOS && errors < 0) {


            if (!sawInputEOS) {
                int inputBufIndex = codec.dequeueInputBuffer(kTimeOutUs);
                //Log.d(TAG, String.format("Archana Dqing the input buffer with BufIndex #: %d",inputBufIndex));


                if (inputBufIndex >= 0) {
                    ByteBuffer dstBuf = codec.getInputBuffers()[inputBufIndex];


                    /*
                     * Read data from file and copy to the input ByteBuffer
                     */
                    try {
                        sizeInBytes = videoFileStream.read(byteArray, 0,
                                tall[index] /*+ 4*/);
                        sampleSize = tall[index]/*+ 4*/;
                        index++;

                    } catch (IOException e) {
                        e.printStackTrace();
                    }
                    if (sizeInBytes <= 0) {
                        codec.queueInputBuffer(
                                inputBufIndex,
                                0 /* offset */,
                                0,
                                presentationTimeUs,
                                MediaCodec.BUFFER_FLAG_END_OF_STREAM );
                        sawInputEOS = true;
                    }
                    else {
                        dstBuf.put(byteArray, 0, sizeInBytes);

                        if (mVideoStart == false) mVideoStart = true;

                        codec.queueInputBuffer(
                                inputBufIndex,
                                0 /* offset */,
                                sampleSize,
                                presentationTimeUs,
                                mVideoStart ? 0:MediaCodec.BUFFER_FLAG_CODEC_CONFIG );
                        //Log.d(TAG, String.format(" After queueing the buffer to decoder with inputbufindex and samplesize #: %d ,%d ind %d",inputBufIndex,sampleSize,index));
                    }
                }
            }

            int res = codec.dequeueOutputBuffer(info, kTimeOutUs);
            //Log.d(TAG, String.format(" Getting the information about decoded output buffer flags,offset,PT,size #: %d %d %d %d",info.flags,info.offset,info.presentationTimeUs,info.size));
            //Log.d(TAG, String.format(" Getting the output of decoder in res #: %d",res));

            if (res >= 0) {
                int outputBufIndex = res;

                //Log.d(TAG, "Output PTS "+info.presentationTimeUs);


                //mspeed.preRender(info.presentationTimeUs);
                //mspeed.setFixedPlaybackRate(25);

                codec.releaseOutputBuffer(outputBufIndex, true /* render */);
                //Log.d(TAG, String.format(" releaseoutputbuffer index= #: %d",outputBufIndex));


                if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
                    Log.d(TAG, "saw output EOS.");
                    sawOutputEOS = true;
                }

            } else if (res == MediaCodec.INFO_OUTPUT_BUFFERS_CHANGED) {
                codec.getOutputBuffers();
                Log.d(TAG, "output buffers have changed.");

            } else if (res == MediaCodec.INFO_OUTPUT_FORMAT_CHANGED) {
                oformat = codec.getOutputFormat();
                Log.d(TAG, "output format has changed to " + oformat);
            }

        }
        codec.stop();
        codec.release();
        this.finish();

    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activity_main, menu);
        return true;
    }
}

推荐答案

上述示例测试有几种解决方法.

There are couples of workaround to problem with the above sample test.

  • 我没有一次向解码器Inout馈入一整帧,而是一次馈入了一个NAL单元.但是,播放速度仍然很慢,无法匹配60FPS
  • Google已将Surface BufferQueue的实现从异步更改为同步.因此,当我们调用MediaCodec.dequeueBuffer来获取解码数据时,服务器端(SurfaceTexture :: dequeueBuffer)将等待缓冲区排队,而客户端等待该操作,以使SurfaceTextureClient :: dequeueBuffer不会返回,直到在服务器端实际将缓冲区排队为止.与在异步模式下一样,将分配一个新的GraphicBuffer.

这篇关于在Android Lollipop 5.0.2上缓慢进行H264 1080P @ 60fps解码的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!

07-24 09:08