【VLC-Android】vlc-android简例——注意参考文献

前言

　　继续折腾vlc，做这个例子并不顺利，卡在只有声音没有图像这个问题好久，网上的例子有些API已经对不上，继续分享，，，

 

声明
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正文

　　截图

　　　　

　　项目

　　　　

　　代码

public class VlcVideoActivity extends Activity implements SurfaceHolder.Callback, IVideoPlayer {private final static String TAG = "[VlcVideoActivity]";private SurfaceView mSurfaceView;private LibVLC mMediaPlayer;private SurfaceHolder mSurfaceHolder;private View mLoadingView;private int mVideoHeight;private int mVideoWidth;private int mVideoVisibleHeight;private int mVideoVisibleWidth;private int mSarNum;private int mSarDen;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_video_vlc);mSurfaceView = (SurfaceView) findViewById(R.id.video);mLoadingView = findViewById(R.id.video_loading);try {mMediaPlayer = VLCInstance.getLibVlcInstance();} catch (LibVlcException e) {e.printStackTrace();}mSurfaceHolder = mSurfaceView.getHolder();mSurfaceHolder.setFormat(PixelFormat.RGBX_8888);mSurfaceHolder.addCallback(this);mMediaPlayer.eventVideoPlayerActivityCreated(true);EventHandler em = EventHandler.getInstance();em.addHandler(mVlcHandler);this.setVolumeControlStream(AudioManager.STREAM_MUSIC);mSurfaceView.setKeepScreenOn(true);//        mMediaPlayer.setMediaList();//        mMediaPlayer.getMediaList().add(new Media(mMediaPlayer, "http://live.3gv.ifeng.com/zixun.m3u8"), false);//        mMediaPlayer.playIndex(0);mMediaPlayer.playMRL("http://live.3gv.ifeng.com/zixun.m3u8");}@Overridepublic void onPause() {super.onPause();if (mMediaPlayer != null) {mMediaPlayer.stop();mSurfaceView.setKeepScreenOn(false);}}@Overrideprotected void onDestroy() {super.onDestroy();if (mMediaPlayer != null) {mMediaPlayer.eventVideoPlayerActivityCreated(false);EventHandler em = EventHandler.getInstance();em.removeHandler(mVlcHandler);}}@Overridepublic void onConfigurationChanged(Configuration newConfig) {setSurfaceSize(mVideoWidth, mVideoHeight, mVideoVisibleWidth, mVideoVisibleHeight, mSarNum, mSarDen);super.onConfigurationChanged(newConfig);}@Overridepublic void surfaceCreated(SurfaceHolder holder) {if (mMediaPlayer != null) {mSurfaceHolder = holder;mMediaPlayer.attachSurface(holder.getSurface(), this);}}@Overridepublic void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {mSurfaceHolder = holder;if (mMediaPlayer != null) {mMediaPlayer.attachSurface(holder.getSurface(), this);//, width, height
        }if (width > 0) {mVideoHeight = height;mVideoWidth = width;}}@Overridepublic void surfaceDestroyed(SurfaceHolder holder) {if (mMediaPlayer != null) {mMediaPlayer.detachSurface();}}@Overridepublic void setSurfaceSize(int width, int height, int visible_width, int visible_height, int sar_num, int sar_den) {mVideoHeight = height;mVideoWidth = width;mVideoVisibleHeight = visible_height;mVideoVisibleWidth = visible_width;mSarNum = sar_num;mSarDen = sar_den;mHandler.removeMessages(HANDLER_SURFACE_SIZE);mHandler.sendEmptyMessage(HANDLER_SURFACE_SIZE);}private static final int HANDLER_BUFFER_START = 1;private static final int HANDLER_BUFFER_END = 2;private static final int HANDLER_SURFACE_SIZE = 3;private static final int SURFACE_BEST_FIT = 0;private static final int SURFACE_FIT_HORIZONTAL = 1;private static final int SURFACE_FIT_VERTICAL = 2;private static final int SURFACE_FILL = 3;private static final int SURFACE_16_9 = 4;private static final int SURFACE_4_3 = 5;private static final int SURFACE_ORIGINAL = 6;private int mCurrentSize = SURFACE_BEST_FIT;private Handler mVlcHandler = new Handler() {@Overridepublic void handleMessage(Message msg) {if (msg == null || msg.getData() == null)return;switch (msg.getData().getInt("event")) {case EventHandler.MediaPlayerTimeChanged:break;case EventHandler.MediaPlayerPositionChanged:break;case EventHandler.MediaPlayerPlaying:mHandler.removeMessages(HANDLER_BUFFER_END);mHandler.sendEmptyMessage(HANDLER_BUFFER_END);break;case EventHandler.MediaPlayerBuffering:break;case EventHandler.MediaPlayerLengthChanged:break;case EventHandler.MediaPlayerEndReached://播放完成break;}}};private Handler mHandler = new Handler() {@Overridepublic void handleMessage(Message msg) {switch (msg.what) {case HANDLER_BUFFER_START:showLoading();break;case HANDLER_BUFFER_END:hideLoading();break;case HANDLER_SURFACE_SIZE:changeSurfaceSize();break;}}};private void showLoading() {mLoadingView.setVisibility(View.VISIBLE);}private void hideLoading() {mLoadingView.setVisibility(View.GONE);}private void changeSurfaceSize() {// get screen sizeint dw = getWindowManager().getDefaultDisplay().getWidth();int dh = getWindowManager().getDefaultDisplay().getHeight();// calculate aspect ratiodouble ar = (double) mVideoWidth / (double) mVideoHeight;// calculate display aspect ratiodouble dar = (double) dw / (double) dh;switch (mCurrentSize) {case SURFACE_BEST_FIT:if (dar < ar)dh = (int) (dw / ar);elsedw = (int) (dh * ar);break;case SURFACE_FIT_HORIZONTAL:dh = (int) (dw / ar);break;case SURFACE_FIT_VERTICAL:dw = (int) (dh * ar);break;case SURFACE_FILL:break;case SURFACE_16_9:ar = 16.0 / 9.0;if (dar < ar)dh = (int) (dw / ar);elsedw = (int) (dh * ar);break;case SURFACE_4_3:ar = 4.0 / 3.0;if (dar < ar)dh = (int) (dw / ar);elsedw = (int) (dh * ar);break;case SURFACE_ORIGINAL:dh = mVideoHeight;dw = mVideoWidth;break;}mSurfaceHolder.setFixedSize(mVideoWidth, mVideoHeight);ViewGroup.LayoutParams lp = mSurfaceView.getLayoutParams();lp.width = dw;lp.height = dh;mSurfaceView.setLayoutParams(lp);mSurfaceView.invalidate();}
}

　　　　代码说明 

　　　　　　1、vlc-android的版本为2.2.0-pre1 Weatherwax

　　　　　　2、拷贝vlc-android官网例子下面org.videolan.libvlc所有的类，以及VLCInstance、Preferences。只有声音没有画面就出在VLCInstance这个问题上，少了一些配置，参考VLCInstance.updateLibVlcSettings。

　　　　　　3、playMRL不要用Uri来转，否则打不开

　　　　　　4、提供的代码已经编译好了so，也修改源码打开了EventHandler.MediaPlayerBuffering（也修改了libvlcjni.c），但是还是没有缓冲进度的值，还有待进一步探索。

　　　　　　5、实际发现如果只在surfaceChanged中attachSurface，setSurfaceSize回调不会触发，需要同时在surfaceCreated中设置。

　　　　　　6、本文不讨论Handler非静态可能引发内存泄露的问题，大家写的时候自己注意一下 :) 

 

　　下载

　　　　https://github.com/over140/vlc-android-demo （注意工程是Android Studio的工程）

 

　　文章

　　　　1、vlc-android 中调用用libvlcjni.so实现流媒体播放 

　　　　2、[Github]vlc-android-macbuild

　　　　3、vlc android的编译及截图，录制视频等功能

　　　　4、vlc-android源码编译过程记录

　　　　5、vlc-android 获取MediaPlayerEncounteredError，MediaPlayerBuffering等各种事件的响应

　　　　6、Vlc-for-android源码分析

 

结束

　　 文章2的GitHub项目是对vlc进行封装，也挺不错了，值得参考。vlc-android的例子写的比较复杂，而且api可能老变，大家看文章的时候注意一下版本问题。