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Somos millones 1
21 juillet 2014, par
Mis à jour : Juin 2015
Langue : français
Type : Video
Autres articles (61)
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Sur d’autres sites (8697)
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Evolution #4727 : Des pictos / icônes symboliques pour tout le monde
14 avril 2021Testé brièvement : les
mask-imagefonctionnent très bien en substitut de la font-face, et ça hérite bien de la taille du texte.
Donc partir des seuls svg il serait possible de générer à la fois le sprite et la CSS des classes sémantiques, super pratique.
Je crois que je vais partir là-dessus.Un truc bizarre cependant : quand sur la même page on a à la fois un svg et une classe qui utilisent tous deux le même sprite svg, et bien le navigateur le charge 2 fois.
Peut-être qu’à ce compte là, la classe devrait utiliser les svg indépendants plutôt que le sprite. Enfin bon, ce seront des questions techniques secondaires à résoudre au fil de l’eau dans le plugin, je note juste ça au passage.<span class="CodeRay"><span class="tag">span> <span class="attribute-name">width</span>=<span class="string"><span class="delimiter">"</span><span class="content">1em</span><span class="delimiter">"</span></span> <span class="attribute-name">height</span>=<span class="string"><span class="delimiter">"</span><span class="content">1em</span><span class="delimiter">"</span></span> <span class="attribute-name">fill</span>=<span class="string"><span class="delimiter">"</span><span class="content">currentColor</span><span class="delimiter">"</span></span><span class="tag">></span>
<span class="tag">span> <span class="attribute-name">xlink:href</span>=<span class="string"><span class="delimiter">"</span><span class="content">sprite.svg#briefcase</span><span class="delimiter">"</span></span><span class="tag">/></span>
<span class="tag"></span>
<span class="tag">span> <span class="attribute-name">class</span>=<span class="string"><span class="delimiter">"</span><span class="content">sp-icone_briefcase</span><span class="delimiter">"</span></span><span class="tag">></span>Texte avec icône CSS<span class="tag"></span></span>
<span class="tag"></span>
</span></span></span> -
I want help in making video collage, tried everything but unsuccessful
16 mars 2016, par Haider AliI want to make Video Collage in which 2 or more videos should be displayed in one frame and then they can be converted into one Video file.
I tried examples but they just add videos at the end of each video to make a long one combine video.
Any Help PleaseString 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/");
</bitmap></bitmap></bitmap></bitmap></bitmap></bitmap>// have the object build the directory structure, if needed.
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 {
/**
* 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);
}
}`
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FFMPEG take 3 minutes to generate thumbanils
19 avril 2022, par The Dead ManI am generating the sprite image (combined thumbnails/screenshots) using FLUENT-FFMPEG and node js, the image looks like this.




Here is my node js script for generating sprite images/thumbnails.


const ffmpegPath = require("@ffmpeg-installer/ffmpeg").path;
const ffmpegCommand = require("fluent-ffmpeg");
ffmpegCommand.setFfmpegPath(ffmpegPath);

let videoUrl =
 "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ElephantsDream.mp4";
const filename = `output_image`;

ffmpegCommand(videoUrl)
 .seekInput("00:00:01.000")
 .outputOptions([
 "-q:v",
 "8",
 "-frames:v",
 "1",
 "-vsync",
 "0",
 "-qscale",
 "50",
 "-vf",
 "fps=1/10,scale=128:72,tile=11x11",
 ])
 .addOption("-preset", "superfast")
 .on("error", (err) => {
 console.log("error", err);
 reject(err);
 })

 .save(`./tmp/${filename}.png`);


Unfortunately, it takes almost 3 minutes to generate this image which is so bad.


UPDATE


@kesh answer is working only with internal videos.


if I add the video URL as follows.


let videoUrl ="./videos/t.mp4";

then it takes less than 3 seconds to generate thumbnails.


but if I use an external URL as follows.


let videoUrl ="http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ElephantsDream.mp4";

Weird, it takes too long to generate thumbnails more than 3 minutes depending on the video.


NOTE you can read full documentation here about FFmpeg and node js.


What do I need to change so that I can super fast generate my thumbnails ?


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