ffmpeg Android 视频转码

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ffmpeg Android 视频转码

创建sdcard:通过命令行使用mksdcard.exe 创mysdcrad.img向sdcard中添加内容：两种可行方案，一种启动虚拟机后直接在eclipse的file explorer的视图中找到/mnt/sdcard文件夹，再点击图标即可；另外还可以通过adbshell中使用adb push文件+对应的sdcard路径
添加虚拟器中读sdcard文件的可写<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>
编写jni调用可参考
http://blog.csdn.net/leixiaohua1020/article/details/47056365

Activity设计实现

目标：实现交互式sdcard文件预览，点击选中视频文件，并生成mkv视频格式。

需要创建派生于ListFragment的并实现onListItemClick的重载

package com.paad.todolist;import com.example.sffmpegandroidhelloworld.Android_FFmpeg_Decoder_Activity.MyBroadcastReceiver;import android.app.ListFragment;import android.content.Intent;import android.util.Log;import android.view.View;import android.widget.ListView;//创建一个对应链表类;public class FileListFragment extends ListFragment {     public int selectid;     public fileItem selectfile=null;     public void onListItemClick(ListView l, View v, int position, long id) {         Log.println(Log.DEBUG, "we are", "ClickListItem");   //添加链表点击打印;         selectfile=(fileItem)getListView().getItemAtPosition(position);          Intent selctIntent=new Intent(MyBroadcastReceiver.EXTRA_FILTER);         selctIntent.putExtra("UPDATE_TRANSFILE", "transfile");         selctIntent.putExtra("TEXT_VALUE",selectfile.getFilename());         getActivity().sendBroadcast(selctIntent);  //绑定过的Fragment;     }     //返回选中的值;     public fileItem getSelectItem(){         return selectfile;     }}

封装文件节点类

package com.paad.todolist;public class fileItem {   String filename;   String Type; public fileItem(){     filename=null;     Type=null; }public fileItem(String filename, String type) {    super();    this.filename = filename;    Type = type;}public String getFilename() {    return filename;}public void setFilename(String filename) {    this.filename = filename;}public String getType() {    return Type;}public void setType(String type) {    Type = type;}@Overridepublic String toString() {    return "fileItem []";}   }

绘制每一个item对应的listview中的每一项对应的View类

package com.paad.todolist;import java.util.List;import com.example.sffmpegandroidhelloworld.R;import android.content.Context;import android.util.Log;import android.view.LayoutInflater;import android.view.View;import android.view.ViewGroup;import android.widget.ArrayAdapter;import android.widget.LinearLayout;import android.widget.TextView;public class MyArrayAdapter extends ArrayAdapter<fileItem> {   int resource;public MyArrayAdapter(Context context, int resource, int textViewResourceId, List<fileItem> objects) {    super(context, resource, textViewResourceId, objects);    // TODO Auto-generated constructor stub}public MyArrayAdapter(Context context, int textViewResourceId, List<fileItem> objects) {    super(context, textViewResourceId, objects);    Log.println(Log.DEBUG, "we are", "init9");    resource=textViewResourceId;    Log.println(Log.DEBUG, "we are", "init10");    // TODO Auto-generated constructor stub}public View getView(int position,View convertView,ViewGroup parent){    Log.println(Log.DEBUG, "we are", "init11");     LinearLayout fileView;     fileItem item =getItem(position);     String filename =item.getFilename();     String fileType=item.getType();     if(convertView==null){        fileView=new LinearLayout(getContext());        String inflater=Context.LAYOUT_INFLATER_SERVICE;            LayoutInflater li;        li=(LayoutInflater)getContext().getSystemService(inflater);        li.inflate(resource, fileView,true);        Log.println(Log.DEBUG, "we are", "init11");     }else{        fileView=(LinearLayout)convertView;     }     TextView fileText=(TextView)fileView.findViewById(R.id.filename);     TextView TypeText=(TextView)fileView.findViewById(R.id.filetype);     fileText.setText(filename);     TypeText.setText(fileType);     Log.println(Log.DEBUG, "we are", "init12");     return fileView;}}

Activity类实现

package com.example.sffmpegandroidhelloworld;import java.io.File;import java.util.ArrayList;import com.paad.todolist.FileListFragment;import com.paad.todolist.MyArrayAdapter;import com.paad.todolist.fileItem;import android.app.Activity;import android.app.FragmentManager;import android.content.BroadcastReceiver;import android.content.Context;import android.content.Intent;import android.content.IntentFilter;import android.graphics.drawable.Drawable;import android.net.Uri;import android.os.Bundle;import android.os.Environment;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.TextView;public class Android_FFmpeg_Decoder_Activity extends Activity{    private FileListFragment listViewer;    private MyArrayAdapter fileItemsAdapter;    private ArrayList<fileItem>fillist;    protected TextView cmdEdittext=null;       //添加广播接收;    public class MyBroadcastReceiver extends BroadcastReceiver{        public final static String EXTRA_NAME="UPDATE_TRANSFILE";        public final static String EXTRA_KEY="TEXT_VALUE";        public final static String EXTRA_FILTER="UI_TRANS";        @Override        public void onReceive(Context context, Intent intent) {            String receivename=intent.getStringExtra(EXTRA_NAME);            if(receivename.equals("transfile")){                //String的值如果不是new String,如果都是相同的字符串就会放在一个地方;                String receiverText=intent.getStringExtra(EXTRA_KEY);                cmdEdittext.setText(receiverText);                  String pstr="you";            }         }      }    private IntentFilter filter=new IntentFilter(MyBroadcastReceiver.EXTRA_FILTER);    private  MyBroadcastReceiver receiver=new MyBroadcastReceiver();    @Override    protected void onPause() {        // TODO Auto-generated method stub        super.onPause();        unregisterReceiver(receiver);    }    //采用匿名内部类的方式;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        Log.println(Log.DEBUG, "we are", "init0");        super.onCreate(savedInstanceState);        Log.println(Log.DEBUG, "we are", "init1");        setContentView(R.layout.decode_ffmpeg_activity);        final Button filePrev=(Button)findViewById(R.id.pre_file);   //选择文件;        final Button startButton=(Button)findViewById(R.id.after_file);  //开始进行文件转换;        cmdEdittext= (TextView)findViewById(R.id.filetoTrans1);        Log.println(Log.DEBUG, "we are", "init2");        filePrev.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                fillist.clear();                Log.println(Log.DEBUG, "we are", "init14");                final File file=Environment.getExternalStorageDirectory();                final File[]  files = file.listFiles();                Drawable currentIcon=null;                 // TODO Auto-generated method stu;                for (File currentFile : files)                {                    fileItem p=new fileItem();                    if (currentFile.isDirectory()){                        currentIcon = getResources().getDrawable(R.drawable.folder);                        p.setFilename(currentFile.getName());                        p.setType("folder");                    }                    else                    {                           String fileName = currentFile.getName();                        p.setFilename(fileName);                        if(checkEndsWithInStringArray(fileName,getResources().getStringArray(R.array.fileEndingImage)))                        {                           currentIcon = getResources().getDrawable(R.drawable.img);                           p.setType("img");                        }                        else if(checkEndsWithInStringArray(fileName,getResources().getStringArray(R.array.fileEndingVideo))){                           currentIcon = getResources().getDrawable(R.drawable.video);                           p.setType("video");                        }                        else if(checkEndsWithInStringArray(fileName,getResources().getStringArray(R.array.fileEndingAudio))){                            currentIcon = getResources().getDrawable(R.drawable.audio);                            p.setType("audio");                        }                        else                                p.setType("default");                    }                    if(fillist!=null){                        fillist.add(p);                         Log.println(Log.DEBUG, "we are", "init15");                    }                    fileItemsAdapter.notifyDataSetChanged();                }            }         });        Log.println(Log.DEBUG, "we are", "init3");        fillist=new ArrayList<fileItem>();        Log.println(Log.DEBUG, "we are", "init4");        int resId=R.layout.file_image1;        Log.println(Log.DEBUG, "we are", "init5");        fileItemsAdapter=new MyArrayAdapter(this, resId, fillist);        Log.println(Log.DEBUG, "we are", "init6");        FragmentManager fm=getFragmentManager();        listViewer=(FileListFragment)fm.findFragmentById(R.id.FileListFragment);        listViewer.setListAdapter(fileItemsAdapter);        startButton.setOnClickListener(new OnClickListener() {            public void onClick(View v) {                 String cmdline="ffmpeg -i"+" "+Environment.getExternalStorageDirectory()+"/"+cmdEdittext.getText().toString()+ " "+Environment.getExternalStorageDirectory()+"/"+cmdEdittext.getText().toString().substring(0,cmdEdittext.getText().toString().lastIndexOf('.'))+".mkv";                  Log.println(Log.DEBUG, "we are", cmdline);                 String[] argv=cmdline.split(" ");                   Integer argc=argv.length;                   ffmpegcore(argc,argv);              }        });   }   protected void onResume(){       super.onResume();       Log.println(Log.DEBUG, "we are", "init0");       registerReceiver(receiver,filter);   }   public native int ffmpegcore(int argc,String[] argv);      private boolean  checkEndsWithInStringArray(String checkItsEnd,String[] fileEndings){        for(String aEnd:fileEndings){             if(checkItsEnd.endsWith(aEnd))                  return true;        }        return false;    }    static {        System.loadLibrary("avutil-55");        System.loadLibrary("swresample-2");        System.loadLibrary("swscale-4");        System.loadLibrary("avcodec-57");        System.loadLibrary("avformat-57");        System.loadLibrary("avfilter-6");        System.loadLibrary("avdevice-57");        System.loadLibrary("decoder_transfer");    }}

源码分享地址：http://pan.baidu.com/s/1bKf94i 密码:kfa1

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