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我想製作視頻拼貼，其中應該在一幀中顯示2個或更多視頻，然後將它們轉換爲一個視頻文件。 我嘗試了一些示例，但他們只是在每個視頻的末尾添加視頻，以製作長整合的視頻。 任何幫助，請我想幫助製作視頻拼貼，嘗試了一切但未成功
String FILE_PATH = "/storage/sdcard0/testing.mp4";
String FILE_PATH2 = "/storage/sdcard0/testing1.mp4";
String FILE_PATH3 = "/storage/sdcard0/testing2.mp4";
File file1 = new File(FILE_PATH);
File file2 = new File(FILE_PATH2);
File file3 = new File(FILE_PATH3);
private ProgressDialog pDialog;
ImageView img,img2,img3;
MediaMetadataRetriever retriever2 = new MediaMetadataRetriever();
MediaMetadataRetriever retriever3 = new MediaMetadataRetriever();
ArrayList<Bitmap> bitmapArray1 = new ArrayList<Bitmap>();
ArrayList<Bitmap> bitmapArray2 = new ArrayList<Bitmap>();
ArrayList<Bitmap> bitmapArray3 = new ArrayList<Bitmap>();
File ScreenDIR = new File("/sdcard/Screens/");
//有對象創建的目錄結構，如果需要的話。
double id1=0,id2=0,id3=0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ScreenDIR.mkdirs();
img = (ImageView)findViewById(R.id.imageView);
img2 = (ImageView)findViewById(R.id.imageView2);
img3 = (ImageView)findViewById(R.id.imageView3);
new LoadAllProducts().execute();
}
class LoadAllProducts extends AsyncTask<String, String, String> {
/**
* Before starting background thread Show Progress Dialog
* */
@Override
protected void onPreExecute() {
super.onPreExecute();
pDialog = new ProgressDialog(MainActivity.this);
pDialog.setMessage("Extracting Frames. Please wait...");
pDialog.setIndeterminate(false);
pDialog.setCancelable(false);
pDialog.show();
}
/**
* getting All products from url
* */
protected String doInBackground(String... args) {
if(file1.exists()){
for (long i = 0; i < 5000; i += 1000/14) { // lenms - video length in milliseconds
MediaMetadataRetriever retriever = new MediaMetadataRetriever();
retriever.setDataSource(file1.toString());
// Bitmap bitmap = retriever.getFrameAtTime((i*1000/14), MediaMetadataRetriever.OPTION_CLOSEST_SYNC);
saveBitmapToCahche(getResizedBitmap((retriever.getFrameAtTime((i*1000/14), MediaMetadataRetriever.OPTION_CLOSEST_SYNC)), 500) ,String.valueOf(id1));
id1++;
//bitmapArray1.add(bitmap);
/* File file = new File(ScreenDIR, "sketchpad1" + id1 + ".png");
FileOutputStream fOut = null;
try {
fOut = new FileOutputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
//bitmap.compress(Bitmap.CompressFormat.PNG, 30, fOut);
try {
fOut.flush();
} catch (IOException e) {
e.printStackTrace();
}
try {
fOut.close();
} catch (IOException e) {
e.printStackTrace();
}*/
}
}
/* if(file2.exists()){
retriever2.setDataSource(file2.toString());
for (long i = 0; i < 3000; i += 1000/24) { // lenms - video length in milliseconds
bitmap2 = retriever2.getFrameAtTime(i*1000/29, MediaMetadataRetriever.OPTION_CLOSEST_SYNC);
//bitmapArray2.add(bitmap2);
File file = new File(ScreenDIR, "sketchpad2" + id2 + ".png");
FileOutputStream fOut = null;
try {
fOut = new FileOutputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
bitmap2.compress(Bitmap.CompressFormat.PNG, 85, fOut);
try {
fOut.flush();
} catch (IOException e) {
e.printStackTrace();
}
try {
fOut.close();
id2++;
} catch (IOException e) {
e.printStackTrace();
}
}
}
if(file3.exists()){
retriever3.setDataSource(file3.toString());
for (long i = 0; i < 3000; i += 1000/24) { // lenms - video length in milliseconds
bitmap3 = retriever3.getFrameAtTime(i*1000/29, MediaMetadataRetriever.OPTION_CLOSEST_SYNC);
// bitmapArray3.add(bitmap3);
File file = new File(ScreenDIR, "sketchpad3" + id3 + ".png");
FileOutputStream fOut = null;
try {
fOut = new FileOutputStream(file);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
bitmap3.compress(Bitmap.CompressFormat.PNG, 85, fOut);
try {
fOut.flush();
} catch (IOException e) {
e.printStackTrace();
}
try {
fOut.close();
id3++;
} catch (IOException e) {
e.printStackTrace();
}
}
}*/
return null;
}
/**
* After completing background task Dismiss the progress dialog
* **/
protected void onPostExecute(String file_url) {
// dismiss the dialog after getting all products
pDialog.dismiss();
img.setImageBitmap(retrieveBitmapFromCache(String.valueOf(id2)));
id2 = 50;
img2.setImageBitmap(retrieveBitmapFromCache(String.valueOf(id2)));
id2 = 69;
img3.setImageBitmap(retrieveBitmapFromCache(String.valueOf(id2)));
// img2.setImageBitmap(bitmapArray2.get(0));
// img3.setImageBitmap(bitmapArray3.get(0));
}
}
public void saveBitmapToCahche(Bitmap bb,String ID){
Cache.getInstance().getLru().put(ID, bb);
}
public Bitmap retrieveBitmapFromCache(String ID) {
Bitmap bitmap = (Bitmap) Cache.getInstance().getLru().get(ID);
return bitmap;
}
public Bitmap getResizedBitmap(Bitmap image, int maxSize) {
int width = image.getWidth();
int height = image.getHeight();
float bitmapRatio = (float)width/(float) height;
if (bitmapRatio > 0) {
width = maxSize;
height = (int) (width/bitmapRatio);
} else {
height = maxSize;
width = (int) (height * bitmapRatio);
}
return Bitmap.createScaledBitmap(image, width, height, true);
}
}
`
這就是說，我認爲它可能與渲染幀並列兩個視頻到GLSurfaceView和共享該表面Mediacodec，這將幀編碼爲h264 你可以給任何例子或幫助這一行的答案 –
我手邊沒有任何示例/內容。我會嘗試搜索一些東西，一旦我獲得免費。 – Ankit
所以檢查這一點。 http://stackoverflow.com/questions/31340382/manipulate-a-custom-glsurfaceview-in-android 那裏的答案解釋了你想要創建什麼。另外還有鏈接到Grafika項目，它也有代碼示例。回答這個問題的Fadden也是Grafika的作者，曾經是谷歌Android團隊的成員。 – Ankit