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1. 使用

注意：存储8张源图的路径是"/sdcard/ScreenRecord/temp/"， 存储输出的视频文件路径为"/sdcard/ScreenRecord/"，事先应现在"/sdcard/ScreenRecord/temp/"放置8张图片，当然本例中是8张，可以根据自己的需求变化

public class MainActivity extends AppCompatActivity {

public static final String IMAGE_TYPE = ".png";

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

}

public void start(View view) {

imageToMp4();

}

/**

* 图片转视频

*/

private void imageToMp4() {

// 生成的新文件名

String newFileName = "test_" + System.currentTimeMillis() + ".mp4";

// 保存的路径

String temp = null;

final double frameRate = 5;

try {

temp = new FileUtils().getSDCardRoot() + "ScreenRecord"

+ File.separator + newFileName;

} catch (FileUtils.NoSdcardException e1) {

e1.printStackTrace();

}

final String savePath = temp;

new Thread() {

@Override

public void run() {

Log.d("test", "开始将图片转成视频啦...frameRate=" + frameRate);

try {

// 临时文件路径即存储源图片的路径

String tempFilePath = new FileUtils().getSDCardRoot()

+ "ScreenRecord/temp" + File.separator;

Log.i("test", "tempFilePath=" + tempFilePath);

Bitmap testBitmap = BitmapFactory.decodeFile(tempFilePath

+ "head1" + MainActivity.IMAGE_TYPE);

//创建一个记录者

FFmpegFrameRecorder recorder = new FFmpegFrameRecorder(

savePath, testBitmap.getWidth(),

testBitmap.getHeight());

// 设置视频格式

recorder.setFormat("mp4");

// 录像帧率

recorder.setFrameRate(frameRate);

// 记录开始

recorder.start();

int index = 0;

while (index < 8) {

// 获取图片--图片格式为head1.png,head2.png...head8.png

opencv_core.IplImage image = cvLoadImage(tempFilePath

+ "head" + index

+ MainActivity.IMAGE_TYPE);

recorder.record(image);

index++;

}

Log.d("test", "录制完成....");

// 录制结束

recorder.stop();

} catch (FileUtils.NoSdcardException | FrameRecorder.Exception e) {

e.printStackTrace();

}

}

}.start();

}

}

FileUtils.java

public class FileUtils {

private String SDCardRoot;

private static boolean isCardExist;

public FileUtils() throws NoSdcardException {

getSDCardRoot();

}

public String getSDCardRoot() throws NoSdcardException{

if(isCardExist()){

SDCardRoot = Environment.getExternalStorageDirectory().getAbsolutePath() + File.separator;

}else{

throw new NoSdcardException();

}

return SDCardRoot;

}

public static boolean isCardExist(){

isCardExist = Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)?true:false;

return isCardExist;

}

public File createFileInSDCard(String fileName, String dir)

throws IOException {

File file = new File(SDCardRoot + dir + File.separator + fileName);

if(!file.exists()){

file.getParentFile().mkdirs();

file.createNewFile();

}

return file;

}

public File creatSDDir(String dir) {

File dirFile = new File(SDCardRoot + dir + File.separator);

if(!dirFile.exists()){

dirFile.mkdirs();

}

return dirFile;

}

public boolean filterFileExist(String path, String filter) {

File file = new File(SDCardRoot + path + File.separator);

if (file.exists() && file.isDirectory()) {

String[] fileNames = file.list(new FilenameFilter() {

public boolean accept(File dir, String filename) {

return filename.endsWith(".png");

}

});

if (fileNames.length > 0) {

return true;

} else {

return false;

}

} else {

return false;

}

}

/**

*

*/

public boolean isFileExist(String fileName, String path) {

File file = new File(SDCardRoot + path + File.separator + fileName);

return file.exists();

}

public File getFile(String fileName,String path){

File file = new File(SDCardRoot + path + File.separator + fileName);

return file;

}

public void deleteFile(String fileName, String path) {

File file = new File(SDCardRoot + path + File.separator + fileName);

boolean result = file.delete();

}

public void closeInputStream(InputStream inputStream){

if(inputStream!=null){

try {

inputStream.close();

} catch (IOException e) {

Log.e("error", "close failed");

e.printStackTrace();

}

}

}

public class NoSdcardException extends Exception{

}

/**

* 删除文件夹中的内容,不删除文件夹本身

* @param path

*/

public static void deleteDirectoryContent(String path){

Log.w("test","deleteDirectory.."+path);

File file=new File(path);

if(!file.exists()){

return;

}

String fPath=file.getAbsolutePath();

if(file.isDirectory()){

String[] files=getDirectoryFiles(path);

if(files==null){

deleteFile(path);

return;

}

for(String str:files){

str=fPath+"/"+str;

file=new File(str);

if(file.isDirectory()){

deleteDirectory(str);

}else if(file.isFile()){

deleteFile(str);

}

}

// deleteFile(path);

}else if(file.isFile()){

deleteFile(path);

}

}

/**

* 删除文件夹中的内容

* @param path

*/

public static void deleteDirectory(String path){

Log.w("test","deleteDirectory.."+path);

File file=new File(path);

if(!file.exists()){

return;

}

String fPath=file.getAbsolutePath();

if(file.isDirectory()){

String[] files=getDirectoryFiles(path);

if(files==null){

deleteFile(path);

return;

}

for(String str:files){

str=fPath+"/"+str;

file=new File(str);

if(file.isDirectory()){

deleteDirectory(str);

}else if(file.isFile()){

deleteFile(str);

}

}

deleteFile(path);

}else if(file.isFile()){

deleteFile(path);

}

}

/**

* 删除指定路径的文件

* @param filePath

* 文件路径

*/

public static void deleteFile(String filePath){

Log.w("test","deleteFile:filePath="+filePath);

if(filePath==null){

return;

}

File file=new File(filePath);

if(file.exists()){

file.delete();

}

}

/**

* 获取文件夹下面的所有文件

* @param path

* @return

*/

public static String[] getDirectoryFiles(String path){

if(path==null){

return null;

}

File file=new File(path);

if(!file.exists()){

return null;

}

String[] files=file.list();

if(files==null || files.length<=0){

return null;

}

return files;

}

}