Develop Reference

Why isOperational() in mobile vision text Recognizer in a device return true and in other return false?

Why isOperational() in mobile vision text recognizer returns false?
At first, mobile vision only show preview camera and after many tries to get the result, I saw that the texts recognized but in one device it works and in other device does not.
What should I do?
For example, in one device, isOperational() returns false, and it goes to readstate() and after that goes to looper() and stays on it!
in other device it only return false and doesn't go to looper.
I want ask other questions about it:
My first question is: how does isOperational() work? I can't understand it.
Maybe it goes to looper to download the native library in a queue and after many try, at last download completes and work. Can it be correct? Or is it just a bug that it goes to looper? Anywhere, what should I do?
Can I work on this when it works in one device I tried and in other does not? Or it must work in every device to I can work on it? And I get .apk from project but it can't install in devices, why?
Should it check for network?
Should it check for access to the memory?
note: it works with camera API and its deprecated. maybe the problem is with this!
TextRecognizer textRecognizer = new TextRecognizer.Builder(context).build();
textRecognizer.setProcessor(new OcrDetectorProcessor(graphicOverlay));
if (!textRecognizer.**isOperational**()) {
// Note: The first time that an app using a Vision API is installed on a
// device, GMS will download a native libraries to the device in order to do detection.
// Usually this completes before the app is run for the first time. But if that
// download has not yet completed, then the above call will not detect any text,
// barcodes, or faces.
//
// isOperational() can be used to check if the required native libraries are currently
// available. The detectors will automatically become operational once the library
// downloads complete on device.
Log.w(TAG, "Detector dependencies are not yet available.");
// Check for low storage. If there is low storage, the native library will not be
// downloaded, so detection will not become operational.*
IntentFilter lowstorageFilter = new IntentFilter(Intent.ACTION_DEVICE_STORAGE_LOW);
boolean hasLowStorage = registerReceiver(null, lowstorageFilter) != null;
if (hasLowStorage) {
Toast.makeText(this, R.string.low_storage_error, Toast.LENGTH_LONG).show();
Log.w(TAG, getString(R.string.low_storage_error));
}
}
*// Creates and starts the camera. Note that this uses a higher resolution in comparison
// to other detection examples to enable the text recognizer to detect small pieces of text.*
cameraSource =
new CameraSource.Builder(getApplicationContext(), textRecognizer)
.setFacing(CameraSource.CAMERA_FACING_BACK)
.setRequestedPreviewSize(1280, 1024)
.setRequestedFps(2.0f)
.setFlashMode(useFlash ? Camera.Parameters.FLASH_MODE_TORCH : null)
.setFocusMode(autoFocus ? Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO : null)
.build();
}
It doesn't produce any error and show preview camera but doesn't recognize texts in some devices.

codename one mediaplayer not working on android device

i am creating a mediaplayer app which is supposed to stream mp3 files from remote url.the problem is that the everything works fine on the codename one simulator but not on an actual android device.I want the app to show native player controls like on the simulator.below is my code and screenshots
try {
video = MediaManager.createMedia(sample_url,true);
Display.getInstance().callSerially(() -> {
if (mp != null){
mp.getMedia().cleanup();
}
Image samp = theme.getImage("sample.png");
Label samlabel = new Label();
samlabel.setIcon(samp);
mp = new MediaPlayer(video);
mp.setAutoplay(false);
video.setNativePlayerMode(true);
sample.add(BorderLayout.CENTER,BorderLayout.centerAbsolute(samlabel));
sample.add(BorderLayout.SOUTH,mp);
//songDetails.add(mp);
});
the first image is the simulator screenshot and the second image is the actual android device screenshot

It's unclear from your post if this is an mp3 which is audio and doesn't have media control or an actual video. The MediaPlayer class is strictly for video and you passed true to indicate that this is a video file so I'll treat it as such.
Notice that if this is an audio file then you need to add/create your own controls and shouldn't use the MediaPlayer class.
We recently defined behaviors for native media control rendering as explained here.
Just use:
video.setVariable(Media.VARIABLE_NATIVE_CONTRLOLS_EMBEDDED, true);

THE JMF REGISTRY CANNOT CAPTURE PC CAM DEVICE 2..1.1E

i HAVE STARTED A NEW video STREAM PROJECT USING java LANGUAGE .I will put you in the scope of my two questions but keep know now that I will ask you about vedio capturing and detection ,not sending videos .
1-I have downloaded the jmf studio and registry . the problem in the jmf regestry .jfm registry cannot detect my pc cam .how can i detect it, or as i read in other words , where the jmf.properties can be put to run the registry well.
2- as i go forward to write the java code , i used this code to detect the cam:
Vector<CaptureDeviceInfo> list = CaptureDeviceManager.getDeviceList ( new
YUVFormat() );
// Iterating list
for(CaptureDeviceInfo temp : list){
// Checking whether the current device supports VfW
// VfW = Video for Windows
if(temp.getName().startsWith("vfw:")){
System.out.println("Found :
"+temp.getName().substring(4));// Selecting the very first device that supports VfW
cam = temp;
System.out.println("Selected :
"+cam.getName().substring(4));
break;
}
}
System.out.println("Put it on work!...");
// Getting the MediaLocator for Selected device.
// MediaLocator describes the location of media content
locator = cam.getLocator();///
this is just a snap shot, look now ,as no device can be detected the locator stay null, now my question is there a realation between the jmf registry and in general any project that will use this function to detect devices. sorry for this long question .
note : as i try all the answers of this question which i have founded on the stack overflow or others with no success , i have been forced to ask it a gain .

Playing media files using JAVA

I want to build a tread safe JAVA application which:
Play *.mp4 or other format HD media files (full-screen mode 1920x1080)
Add event bindings to applet (I'll be using touchscreen monitor)
I tried to search a lot, but found only outdated examples of JMF (VLCJ and etc.).
So I want you to ask from where to start building this applet.
What libraries I can include.
I found a similar project here: Media Shuffle
But I want my media files to be located in one folder and they appear in applications as icons which start selected video (VLC fullscreen or other cross-platform media player) to play on 1st touch. The second touch have to stop player and go to the main page.
Please, share your ideas how I can do that. Any code examples would be great.

I would recommend vlcj because i am sure it has all the formats you could need or have.Its not outdated at all and easy to start with.If you want to display a video graphically i dont think you could ever find so simple instructions like you mention but if you organize all steps that i will mention and explain in more depth you will see that vlcj is the best option for handling media like that (as it goes in my opinion).I also like and recommend JavaFx because of the effects you can make with that but its too difficult for me to setup and code in that stuff.
So, lets begin.Firstly, i would like to say that i have implemented the vlcj in a Swing-based application (in Windows) but that should not make you sad because for an immediate popup player that you mention we could just make a jdialog and place the video-surface in its contentPane.
Steps
1)So the first thing that should be done is to download vlc media player (we will need the 32 bit version that plays in both 32bit or 64bit computer environments).I had a terrible month trying to configure why my app wasnt loading the required libraries succesfully and found out that when you run a jar exetutable file it runs on 32-bit jvm(in eclipse was running in 64bit jvm and everything was ok.Thats why we need 32bit version), while i had 64-bit native libraries to load from.Anyways if you download and install 32bit vlc media player make somewhere a folder to include your project(lets say "C:/MyProject") inside MyProject create another folder and call it for instance "Needed"(here we will place all the required libraries for vlcj in order to work properly).Now from the contents of C:\Program Files (x86)\VideoLAN\VLC copy the plugins directory and the 4 dlls
(axvlc.dll,libvlc.dll,libvlccore.dll,npvlc.dll) and paste them inside your Needed folder
2)Now if you work in Eclipse IDE or similar you will need to make a folder in your project (lets say "lib") and inside that create another folder( name it "jars" ).In jars folder place the following jars: jna-3.5.1.jar, platform-3.5.1.jar,vlcj-2.2.0.jar.You can find these jars from vlcj google project.And then just include them to your classpath(either select them and right-click->add to build path or go to project properties->Java build path and add those 3 jars).Thats all for setup before we begin any coding with player setup.
3) You have to load now vlcj before starting using it.I just use this code to make that possible(i will explain it shortly dont worry).
public void LoadLibrary(){
SwingWorker loadWorker;
loadWorker = new SwingWorker(){
#Override
protected Object doInBackground() throws Exception {
// TODO Auto-generated method stub
Thread.sleep(2000);
path = new File("").getAbsolutePath().toString();
path = path.replace(".", "");
path = path.replace("\\", "//");
path = path+"//Needed";
if(RuntimeUtil.isWindows()){
NativeLibrary.addSearchPath(
"libvlc",path
);
Native.loadLibrary(RuntimeUtil.getLibVlcLibraryName(), LibVlc.class);
}
else if(RuntimeUtil.isNix()){
NativeLibrary.addSearchPath(
"libvlc",path
);
}
mediaPlayerFactory = new MediaPlayerFactory();
player = mediaPlayerFactory.newEmbeddedMediaPlayer();
CanvasVideoSurface videoSurface = mediaPlayerFactory.newVideoSurface(canvas);
player.setVideoSurface(videoSurface);
return null;
}
};
loadWorker.execute();
}
So what i do is to make a thread for Swing-based apps because you cannot play media if your media canvas is not displayable and everything in the constructor is fully built when its code is done.That means that before making the player we should first create a delay(mine is 2 seconds) for our constructor to end his job and our JFrame(or jWindow or jDialog etc) to become displayable.Next i calculate my path dynamically taking the path of my runnable jar(attention: not from workspace inside Eclipse) and entering the Needed folder to implement the required native libraries.Inside the if statement i tell the system to look for the libvlc.dll in the specific path i calculated and then load it and thus make one step forward to play media files.Outside if-else statement i actually create my player and place the canvas for its VideoSurface(canvas is a Canvas java.awt Object I use WindowsCanvas because i work only in windows, you could find for linux or mac a similar canvas(dont worry about that!)) Outside the Swing-Worker field(the thread) i just telling the thread to be executed (important as a call-function instruction).
4)To play a file i just use a button somewhere in my app to call an action event each time it is pressed so that we do something inside it.I for example make a JFileChooser to choose a media file from.You can easily search for it but here is my code:
final JFileChooser chooser = new JFileChooser();
FileNameExtensionFilter filter0 = new FileNameExtensionFilter(".wav", "wav");
FileNameExtensionFilter filter1 = new FileNameExtensionFilter(".mp3","mp3");
FileNameExtensionFilter filter2 = new FileNameExtensionFilter(".mpg","mpg");
FileNameExtensionFilter filter3 = new FileNameExtensionFilter(".mp4","mp4");
FileNameExtensionFilter filter4 = new FileNameExtensionFilter(".avi","avi");
FileNameExtensionFilter filter5 = new FileNameExtensionFilter(".flv","flv");
FileNameExtensionFilter filter6 = new FileNameExtensionFilter(".wmv","wmv");
FileNameExtensionFilter filter7 = new FileNameExtensionFilter(".3gp", "3gp");
FileNameExtensionFilter filter8 = new FileNameExtensionFilter(".swf", "swf");
FileNameExtensionFilter filter9 = new FileNameExtensionFilter(".mkv", "mkv");
FileNameExtensionFilter filter10 = new FileNameExtensionFilter(".flac", "flac");
FileNameExtensionFilter filter11 = new FileNameExtensionFilter("Music & Videos","wav","mp3","mpg","mp4","avi","flv","wmv","3gp","swf","mkv","flac","VOB");
FileNameExtensionFilter filter12 = new FileNameExtensionFilter("Music","wav","mp3","flac");
FileNameExtensionFilter filter13 = new FileNameExtensionFilter(".VOB", "VOB");
FileNameExtensionFilter filter14 = new FileNameExtensionFilter("Videos","mpg","mp4","avi","flv","wmv","3gp","swf","mkv","VOB");
chooser.setFileFilter(filter14);
chooser.setFileFilter(filter2);
chooser.setFileFilter(filter3);
chooser.setFileFilter(filter4);
chooser.setFileFilter(filter5);
chooser.setFileFilter(filter6);
chooser.setFileFilter(filter13);
chooser.setFileFilter(filter7);
chooser.setFileFilter(filter8);
chooser.setFileFilter(filter9);
chooser.setFileFilter(filter12);
chooser.setFileFilter(filter0);
chooser.setFileFilter(filter1);
chooser.setFileFilter(filter10);
chooser.setFileFilter(filter11);
int returnVal = chooser.showOpenDialog(getParent());
if(returnVal == JFileChooser.APPROVE_OPTION) {
System.out.println("You chose to open this file: " +
chooser.getSelectedFile().getName());
File myfile1 = chooser.getSelectedFile();
myfilepath1 = chooser.getSelectedFile().getAbsolutePath();
}
player.startMedia("file:///"+myfilepath1);
player.pause();
Those file filters are some of the media file types that vlcj can play for u.What i do is opening a file dialog to choose a file from and if i choose a file i hold its path(usefull for saying vlcj where to look for it).
5)Now to play the file u just have to type the following code :
player.play();
Maybe inside another action event of another Button.
6) if you finish writing those all you have to do is to export your project to a runnable jar file into your MyProject folder first created and run it (attention by double-clicking it (not from console(else it will be runned with 64bit jvm and you dont want that cause you have 32 bit natives and vlcj dont accept those conflicts)))
In Conclusion,i have to say that these steps worked for me.I hope they will help you go further in your app developement.
Regards,
PeGiannOS

First you have to
// create a player to play the media specified in the URL
Player mediaPlayer = Manager.createRealizedPlayer( mediaURL );
Now
mediaPlayer.start(); // start playing the media clip
I hope it work!

VLCJ isn't outdated, it's actively developed and immensely flexible and powerful in what it can achieve. I'm using it in my application to display a number of video streams inside the application at once, as well as doing things such as text overlays simultaneously. It's sometimes tricky to do this, but definitely possible.
There are a number of basic (up-to-date) examples to get you started with VLCJ here.

How to play sound in JavaFX?

I'm experimenting with JavaFX making a small game.
I want to add sound.
How?
I tried MediaPlayer with media defined with relative source attribute like:
attribute media = Media{
source: "{__FILE__}/sound/hormpipe.mp3"
}
attribute player = MediaPlayer{
autoPlay:true
media:media
}
It doesn't play.
I get
FX Media Object caught Exception com.sun.media.jmc.MediaUnavailableException: Media unavailable: file: ... Sound.class/sound/hormpipe.mp3

Just a guess, but is that file "hornpipe.mp3" and not "hormpipe.mp3" (with an m)?

var player = javafx.scene.media.MediaPlayer {
repeatCount: javafx.scene.media.MediaPlayer.REPEAT_FOREVER
media: Media { source: "{\_\_DIR\_\_}clip.wav"
};
};
player.play();
You have to incluye the audio file in the build/compiled directory so Netbeans can pack it into the jar file.

Just a guess, but I think your {__FILE__} will expand to the name of your file. Try replacing it with {__DIR__}.

Also note that {__DIR__} includes the trailing /, so try this instead:
attribute media = Media{
source: "{__DIR__}sound/hormpipe.mp3"}
EDIT: I did some digging, and apparently, the source of a Media object has to be either a remote URL, or an absolute file path, since media files aren't allowed in JARs (something I hope gets changed with future releases, since I really like JavaFX and want to be able to make desktop apps with it). See: JavaFX FAQs.

This worked for me:
MediaPlayer audio = new MediaPlayer(
new Media(
new File("file.mp3").toURI().toString()));
Source file should be in project's root directory (not src, not dist).

OK, having used this question to get MP3 audio working (kinda), I've learned the following (not much).
1) Audio for compressed formats is very platform dependent. My continually upgraded Mint 17.1->18 machine plays mp3 fine using Media and MediaPlayer. Fresh installs of Mint 18 won't (with the dev tools).
So use .wav files.
Media sound=new Media(new File("noises/roll.wav").toURI().toString());
MediaPlayer mediaPlayer=new MediaPlayer(sound);
mediaPlayer.play();
2) One of the things you need to be aware of with Media/MediaPlayer is that in order to play multiple times (repeatedly or all at once ie, on a button press/whatever in a game) you have to spawn N number of MediaPlayer objects, and each one will play once and then stop.
So use javafx.scene.media.AudioClip
AudioClip soundMyNoise = new AudioClip(new File("noises/roll.wav").toURI().toString());
soundMyNoise.play();
AudioClip also has its issues, which include storing the raw audio data in RAM all at once instead of buffering. So there is the possibility of excessive memory use.
No matter which method you end up going with, one thing to be critically aware of was mentioned by daevon earlier - the path issue. With NetBeans, you have NetBeansProjects/yourproject/src/yourproject/foo.java. The sounds in the example above go in NetBeansProjects/yourproject/noises/roll.wav