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Médias (1)
-
La conservation du net art au musée. Les stratégies à l’œuvre
26 mai 2011
Mis à jour : Juillet 2013
Langue : français
Type : Texte
Autres articles (104)
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Soumettre améliorations et plugins supplémentaires
10 avril 2011Si vous avez développé une nouvelle extension permettant d’ajouter une ou plusieurs fonctionnalités utiles à MediaSPIP, faites le nous savoir et son intégration dans la distribution officielle sera envisagée.
Vous pouvez utiliser la liste de discussion de développement afin de le faire savoir ou demander de l’aide quant à la réalisation de ce plugin. MediaSPIP étant basé sur SPIP, il est également possible d’utiliser le liste de discussion SPIP-zone de SPIP pour (...) -
Emballe médias : à quoi cela sert ?
4 février 2011, parCe plugin vise à gérer des sites de mise en ligne de documents de tous types.
Il crée des "médias", à savoir : un "média" est un article au sens SPIP créé automatiquement lors du téléversement d’un document qu’il soit audio, vidéo, image ou textuel ; un seul document ne peut être lié à un article dit "média" ; -
ANNEXE : Les plugins utilisés spécifiquement pour la ferme
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Sur d’autres sites (10828)
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Evolution #4305 : Permettre d’ordonner une liste d’objets liés à un autre objet
27 novembre 2020, par Peet duHolà,
Après de (très) nombreux tests, ça marche bien.
J’ajouterais que, en adaptant le code de
/prive/objets/liste/auteurs_lies.htmlsur divers plugins, j’arrive à ordonner des liaisons autres que celles des auteurs.
Du coup, je confirme que le plugin Rang_auteurs est bien générique et qu’il mériterait sans doute de s’appeler "Rang_liens"Super merci pour tout ce boulot.
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How to verify user permissions – Introducing the Piwik Platform
9 novembre 2014, par Thomas Steur — DevelopmentThis is the next post of our blog series where we introduce the capabilities of the Piwik platform (our previous post was How to make your plugin multilingual). This time you’ll learn how to verify user permissions. For this tutorial you will need to have basic knowledge of PHP and the Piwik platform.
When should a plugin verify permissions ?
Usually you want to do this before executing any action – such as deleting or fetching data – and before rendering any sensitive information that should not be accessible by everyone. For instance in an API method or Controller action. You sometimes also need to verify permissions before registering menu items or widgets.
How does Piwik’s user management work ?
It is quite simple as it only differentiates between a few roles : View permission, Admin permission and Super User permission. If you manage multiple websites with Piwik a user can be assigned to different roles as a user might have no permission for some websites but view or admin permission for another set of websites.
Worth mentioning is that roles inherit from each other. This means the role admin automatically includes the role view and a super user automatically covers the view and admin role.
Getting started
In this post, we assume that you have already set up your development environment and created a plugin. If not, visit the Piwik Developer Zone where you’ll find the tutorial Setting up Piwik and other Guides that help you to develop a plugin.
Verifying user permissions
To protect your data the platform offers many convenient methods in the \Piwik\Piwik class. There you will find methods that either start with
check,isorhas. While methods that start withcheckthrow an exception in case a condition is not met, the other methods return a booleantrueorfalse.Use methods that throw an exception if you want to stop any further execution in case a user does not have an appropriate role. The platform will catch the exception and display an error message or ask the user to log in.
- public function deleteAllMessages()
- {
- // delete messages only if user has super user access, otherwise show an error message
- Piwik::checkUserSuperUserAccess();
- $this->getModel()->deleteAllMessages();
- }
Use methods that return a boolean for instance when registering menu items or widgets.
- public function configureAdminMenu(MenuAdmin $menu)
- {
- if (Piwik::hasUserSuperUserAccess()) {
- $menu->addPlatformItem('Plugins', $this->urlForDefaultAction());
- }
- }
It is important to be aware that just because the menu item won’t be displayed in the UI a user can still open the registered URL manually. Therefore you have to check for permissions in the actual controller action as well.
View permission
A user having a view permission should be only able to view reports but not make any changes apart from his personal settings. The methods that end with
UserHasSomeViewAccessmake sure a user has at least view permission for one website whereas the methods*UserHasViewAccess($idSites = array(1,2,3))check whether a user has view access for all of the given websites.- Piwik::checkUserHasSomeViewAccess();
As a plugin developer you would usually use the latter example to verify the permissions for specific websites. Use the first example in case you develop something like an “All Websites Dashboard” where you only want to make sure the user has a view permission for at least one website.
Admin permission
A user having an admin permission cannot only view reports but also change website related settings. The methods to check for this role are similar to the ones before, just swap the term
ViewwithAdmin.- Piwik::checkUserHasSomeAdminAccess();
Super user permission
A user having the super user permission is allowed to access all of the data stored in Piwik and change any settings. To check if a user has this role use one of the methods that end with
UserSuperUserAccess.Piwik::checkUserHasSuperUserAccess();As a plugin developer you would check for this permission for instance in places where your plugin shows an activity log over all users or where it offers the possibility to change any system wide settings.
Getting information about the currently logged in user
Sometimes you might want to know which user is currently logged in. This can be useful if you want to persist user related information in the database or if you want to send an email to the currently logged in user. You can easily get this information by calling the following methods :
- $login = Piwik::getCurrentUserLogin()
- $email = Piwik::getCurrentUserEmail()
Advanced features
Of course there is more that you can do. For instance you can verify whether a user is an anonymous user or whether a user has a specific role. You can also perform any operation in the context of a super user even if the current user does not have this role. Would you like to know more about those features ? Check out the Piwik class reference, the Security guide and the Manage Users user guide.
If you have any feedback regarding our APIs or our guides in the Developer Zone feel free to send it to us.
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Audio Video Mixing - Sync issue in Android with FFMPEG, Media Codec in different devices
24 novembre 2020, par khushbuI have already tried everything for Audio Video mixing and it's not working perfectly as in processing while mixing audio into the recorded video, sometimes the audio is ahead of video and vice-versa.


Using FFMPEG :


This is for add an Audio file to the Video file and generated the final Video where audio is replaced in the video.


val cmd ="-i $inputVideoPath -i ${inputAudio.absolutePath} -map 0:v -map 1:a -c:v copy -shortest ${outputVideo.absolutePath}"


After generating the final video, found some delay based on device performance so added delay in the below two cases :


1)Added delay in Audio if audio is ahead of the video.


val cmd = "-i ${tmpVideo.absolutePath} -itsoffset $hms -i ${tmpVideo.absolutePath} -map 0:v -map 1:a -c copy -preset veryfast ${createdVideo1?.absolutePath}"


2)Added delay in Video if the video is ahead of the audio.


val cmd = "-i ${tmpVideo.absolutePath} -itsoffset $hms -i ${tmpVideo.absolutePath} -map 1:v -map 0:a -c copy -preset veryfast ${createdVideo1?.absolutePath}"


NOTE : Here $hms is delay in 00:00:00.000 formate


but still, it's not working on all the devices like readmi, oneplus etc.


Using Media Codec :


Found some better performance in this solution but still not working on all the devices.


In this process, It's supporting .aac format so first if the user selected .mp3 formate than i have to convert it into .aac format using the below function :


fun Convert_Mp3_to_acc() {

 
 AndroidAudioConverter.load(requireActivity(), object : ILoadCallback {
 override fun onSuccess() {

 val callback: IConvertCallback = object : IConvertCallback {
 override fun onSuccess(convertedFile: File) {
 toggleLoader(false)
 audioLink = convertedFile.absolutePath
 append()
 

 }

 override fun onFailure(error: java.lang.Exception) {
 toggleLoader(false)
 Toast.makeText(requireActivity(), "" + error, Toast.LENGTH_SHORT).show()
 }
 }
 AndroidAudioConverter.with(requireActivity())
 .setFile(File(audioLink))
 .setFormat(AudioFormat.AAC)
 .setCallback(callback)
 .convert()
 }

 override fun onFailure(error: java.lang.Exception) {
 toggleLoader(false)
 }
 })
}


After successful conversion from .mp3 to .aac formate, It's extracting audio track and video track for merge


private fun append(): Boolean {

 val progressDialog = ProgressDialog(requireContext())
 Thread {
 requireActivity().runOnUiThread {
 progressDialog.setMessage("Please wait..")
 progressDialog.show()
 }
 val video_list = ArrayList<string>()
 for (i in videopaths.indices) {
 val file: File = File(videopaths.get(i))
 if (file.exists()) {
 val retriever = MediaMetadataRetriever()
 retriever.setDataSource(requireActivity(), Uri.fromFile(file))
 val hasVideo =
 retriever.extractMetadata(MediaMetadataRetriever.METADATA_KEY_HAS_VIDEO)
 val isVideo = "yes" == hasVideo
 if (isVideo /*&& file.length() > 1000*/) {
 Log.d("resp", videopaths.get(i))
 video_list.add(videopaths.get(i))
 }
 }
 }
 try {
 val inMovies = arrayOfNulls<movie>(video_list.size)
 for (i in video_list.indices) {
 inMovies[i] = MovieCreator.build(video_list[i])
 }
 val videoTracks: MutableList<track> =
 LinkedList()
 val audioTracks: MutableList<track> =
 LinkedList()
 for (m in inMovies) {
 for (t in m!!.tracks) {
 if (t.handler == "soun") {
 audioTracks.add(t)
 }
 if (t.handler == "vide") {
 videoTracks.add(t)
 }
 }
 }
 val result = Movie()
 if (audioTracks.size > 0) {
 result.addTrack(AppendTrack(*audioTracks.toTypedArray()))
 }
 if (videoTracks.size > 0) {
 result.addTrack(AppendTrack(*videoTracks.toTypedArray()))
 }
 val out = DefaultMp4Builder().build(result)
 var outputFilePath: String? = null
 outputFilePath = Variables.outputfile

 /*if (audio != null) {
 Variables.outputfile
 } else {
 Variables.outputfile2
 }*/

 val fos = FileOutputStream(File(outputFilePath))
 out.writeContainer(fos.channel)
 fos.close()

 requireActivity().runOnUiThread {
 progressDialog.dismiss()

 Merge_withAudio()

 /* if (audio != null) else {
 //Go_To_preview_Activity()
 }*/
 }
 } catch (e: java.lang.Exception) {
 }
 }.start()

 return true
}
</track></track></movie></string>

This will add the selected audio with the recorded video


fun Merge_withAudio() {
 val root = Environment.getExternalStorageDirectory().toString()

 // Uri mediaPath = Uri.parse("android.resource://" + getPackageName() + "/" + R.raw.file_copy);
 //String audio_file =Variables.app_folder+Variables.SelectedAudio_AAC;

 //String filename = "android.resource://" + getPackageName() + "/raw/file_copy.aac";
 val audio_file: String = audioLink!!
 Log.e("Merge ", audio_file)
 val video = "$root/output.mp4"

 val bundle=Bundle()
 bundle.putString("FinalVideo", createdVideo?.absolutePath)

 val merge_video_audio = Merge_Video_Audio(this, bundle, object : AsyncResponse {
 override fun processFinish(output: Bundle?) {

 requireActivity().runOnUiThread {
 finalVideo = bundle.getString("FinalVideo")
 createdVideo = File(finalVideo)

 Log.e("Final Path ", finalVideo)

 createThumb {
 setUpExoPlayer()
 }
 }

 }
 })
 merge_video_audio.doInBackground(audio_file, video, createdVideo?.absolutePath)
}


 public class Merge_Video_Audio extends AsyncTask {

 ProgressDialog progressDialog;
 RecentCompletedVideoFragment context;
 public AsyncResponse delegate = null;


Bundle bundleValue;

String audio,video,output;

public Merge_Video_Audio(RecentCompletedVideoFragment context, Bundle bundle , AsyncResponse delegate ){
 this.context=context;
 this.bundleValue=bundle;
 this.delegate=delegate;
 progressDialog=new ProgressDialog(context.requireContext());
 progressDialog.setMessage("Please Wait...");
}

@Override
protected void onPreExecute() {
 super.onPreExecute();
}

@Override
public String doInBackground(String... strings) {
 try {
 progressDialog.show();
 }catch (Exception e){

 }
 audio=strings[0];
 video=strings[1];
 output=strings[2];

 Log.d("resp",audio+"----"+video+"-----"+output);

 Thread thread = new Thread(runnable);
 thread.start();

 return null;
}


@Override
protected void onPostExecute(String s) {
 super.onPostExecute(s);
 Log.e("On Post Execute ", "True");


}


 public void Go_To_preview_Activity(){

 delegate.processFinish(bundleValue);
 }

 public Track CropAudio(String videopath, Track fullAudio){
 try {

 IsoFile isoFile = new IsoFile(videopath);

 double lengthInSeconds = (double)
 isoFile.getMovieBox().getMovieHeaderBox().getDuration() /
 isoFile.getMovieBox().getMovieHeaderBox().getTimescale();


 Track audioTrack = (Track) fullAudio;


 double startTime1 = 0;
 double endTime1 = lengthInSeconds;


 long currentSample = 0;
 double currentTime = 0;
 double lastTime = -1;
 long startSample1 = -1;
 long endSample1 = -1;


 for (int i = 0; i < audioTrack.getSampleDurations().length; i++) {

 long delta = audioTrack.getSampleDurations()[i];

 if (currentTime > lastTime && currentTime <= startTime1) {
 // current sample is still before the new starttime
 startSample1 = currentSample;
 }
 if (currentTime > lastTime && currentTime <= endTime1) {
 // current sample is after the new start time and still before the new endtime
 endSample1 = currentSample;
 }

 lastTime = currentTime;
 currentTime += (double) delta / (double) audioTrack.getTrackMetaData().getTimescale();
 currentSample++;
 }

 CroppedTrack cropperAacTrack = new CroppedTrack(fullAudio, startSample1, endSample1);

 return cropperAacTrack;

 } catch (IOException e) {
 e.printStackTrace();
 }

 return fullAudio;
}



 public Runnable runnable =new Runnable() {
 @Override
 public void run() {

 try {

 Movie m = MovieCreator.build(video);


 List nuTracks = new ArrayList<>();

 for (Track t : m.getTracks()) {
 if (!"soun".equals(t.getHandler())) {

 Log.e("Track ",t.getName());
 nuTracks.add(t);
 }
 }

 Log.e("Path ",audio.toString());


 try {
 // Track nuAudio = new AACTrackImpl();
 Track nuAudio = new AACTrackImpl(new FileDataSourceImpl(audio));

 Track crop_track = CropAudio(video, nuAudio);

 nuTracks.add(crop_track);

 m.setTracks(nuTracks);

 Container mp4file = new DefaultMp4Builder().build(m);

 FileChannel fc = new FileOutputStream(new File(output)).getChannel();
 mp4file.writeContainer(fc);
 fc.close();

 }catch (FileNotFoundException fnfe){
 fnfe.printStackTrace();
 }catch(IOException ioe){
 ioe.printStackTrace();
 }


 try {

 progressDialog.dismiss();
 }catch (Exception e){
 Log.d("resp",e.toString());

 }finally {
 Go_To_preview_Activity();

 }

 } catch (IOException e) {
 e.printStackTrace();
 Log.d("resp",e.toString());

 }

 }

 };

 }


This solution is also not working in all the devices.


Can anyone suggest where i am going wrong or any solution for it ?


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