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Autres articles (6)
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XMP PHP
13 mai 2011, parDixit Wikipedia, XMP signifie :
Extensible Metadata Platform ou XMP est un format de métadonnées basé sur XML utilisé dans les applications PDF, de photographie et de graphisme. Il a été lancé par Adobe Systems en avril 2001 en étant intégré à la version 5.0 d’Adobe Acrobat.
Étant basé sur XML, il gère un ensemble de tags dynamiques pour l’utilisation dans le cadre du Web sémantique.
XMP permet d’enregistrer sous forme d’un document XML des informations relatives à un fichier : titre, auteur, historique (...) -
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 (...) -
Automated installation script of MediaSPIP
25 avril 2011, parTo overcome the difficulties mainly due to the installation of server side software dependencies, an "all-in-one" installation script written in bash was created to facilitate this step on a server with a compatible Linux distribution.
You must have access to your server via SSH and a root account to use it, which will install the dependencies. Contact your provider if you do not have that.
The documentation of the use of this installation script is available here.
The code of this (...)
Sur d’autres sites (2060)
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Record video of a specific window with ffmpeg
6 mars 2012, par Esteban AngeeIm currently working with ubuntu 10.04 and ffmpeg. Here is my situation :
I have this command which creates a window and reproduces a video in it :
video_handle/static/simpleVRML media/generated/video1330515739317/chunk0.aviI need to record the video that is being displayed in that video container and save it to a video file ; webm is preferred. The video length is exactly 1 second and fps is 29.97
I have already tried this command :
ffmpeg -loglevel panic -f x11grab -s 640x480 -r 25 -i :0.0+0,50 -vframes 30 -sameq -y out.mpg >/dev/null 2>&1It actually records the screen as the container emerges but I need the output to be really accurate
Any ideas ???
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Flutter : Failed assertion : 'file.absolute.existsSync()' : is not true
11 août 2022, par whatwhatwhatIn my app, a user can send a file to others in a group chat. First, the user records some audio using their mic. The file is then touched up using FFMPEG. Then, the file is uploaded to Firebase Cloud Storage and if this is successful, a record is written in Firebase Realtime Database.


I'm getting the error below when the user records a long audio file and then presses submit. It almost seems as though FFMPEG hasn't finished processing the file...but I thought I used my async/await correctly to make sure that this processing is finished before moving on ?




##MyAppFile## saveMyAppFileToCloudStorage Error : 'package:firebase_storage/src/reference.dart' : Failed assertion : line 127 pos 12 : 'file.absolute.existsSync()' : is not true.




Psuedo-code :


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- User records audio
- Audio file is processed using FFMPEG and the new processed file is created on the user's phone
- User hits submit, uploading the file to Cloud Storage and, if successful, writing a record to Realtime Database








Order of Functions After User Hits Submit :


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- msgInput.dart -> sendMyAppFile()
- msgInput.dart -> prepareMyAppFileForSending()
- msgInput.dart -> runFFMPEGHighLow()
- message_dao.dart -> sendMyAppFile()
- message_dao.dart -> saveMyAppFileToCloudStorage() //ERROR COMES FROM THIS FUNCTION












The Code :


//msgInput.dart
Future<void> sendMyAppFile() async {
 if (sendableMyAppFileExists == 1) {
 final MyAppFileReadyToBeSent = await prepareMyAppFileForSending();

 if (MyAppFileReadyToBeSent == '1') {
 messageDao.sendMyAppFile(MyAppFile, filepath, filename); 
 } else {
 
 }
 }

 setState(() {
 sendableMyAppFileExists = 0;
 });
 }
 
 Future<string> prepareMyAppFileForSending() async {
 if (sendableMyAppFileExists == 1) {
 if (recordedMyAppFileFilterID == '1') {

 await runFFMPEGHighLow('1'); 

 return '1';
 }

 if (recordedMyAppFileFilterID == '2') {

 await runFFMPEGHighLow('2'); 

 return '1';
 }
 }

 return '0';
 }
 
 Future<void> runFFMPEGHighLow(String filterID) async { 
 if (filterID != '1' && filterID != '2') {
 return;
 }

 if (sendableMyAppFileExists == 1) {
 if (filterID == '1') {

 await FFmpegKit.executeAsync(/*...parms...*/);
 setState(() {
 currentMyAppFileFilename = currentMyAppFileFilename + '1.mp3'; 
 });

 }

 if (filterID == '2') {

 await FFmpegKit.executeAsync(/*...parms...*/);
 setState(() {
 currentMyAppFileFilename = currentMyAppFileFilename + '2.mp3';
 });

 }
 }
 }
 
//message_dao.dart
void sendMyAppFile(ChatData MyAppFile, String filepath, String filename) {
 saveMyAppFileToCloudStorage(filepath, filename).then((value) {
 if (value == true) {
 saveMyAppFileToRTDB(MyAppFile);
 }
 });
 }
 
Future<bool> saveMyAppFileToCloudStorage(String filepath, String filename) async {
 //filepath: /data/user/0/com.example.MyApp/app_flutter/MyApp/MyAppAudioFiles/MyAppFiles/2d7af6ae-6361-4be5-8209-8498dd17d77d1.mp3
 //filename: 2d7af6ae-6361-4be5-8209-8498dd17d77d1.mp3

 _firebaseStoragePath = MyAppFileStorageDir + filename;
 
 File file = File(filepath);

 try {
 await _firebaseStorage
 .ref(_firebaseStoragePath)
 .putFile(file);
 return true;
 } catch (e) {
 print('##MyAppFile## saveMyAppFileToCloudStorage Error: ' + e.toString()); //ERROR COMES FROM THIS LINE
 return false;
 }
 return true;
 }
</bool></void></string></void>

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Coverting mp4 Stream's Audio to MP3 Instead of AAC [on hold]
15 janvier 2019, par user3763099I’ve written 2 programs : one records streams that I’m getting via video encoders, and another plays back all of the streams synchronized to each other. I’m having an issue with audio however. The recorded streams are getting encoded by default into AAC - the playback tool is unable to find a codec to decode this format, so audio is not ideal.
I don’t really have any control over what the stream looks like, but when I go to record the frames is there any way to tell it to record in a different format ? If not it looks like I’ll need to compile FFMPEG myself with AAC support, but I was hoping to avoid that.
This was flagged as being "too broad," but I’m not sure how, it’s pretty darn specific. I am asking if there is a way to record a stream via C++ that is coming across with AAC audio as MP3 audio instead. Does that clarify ? I literally cannot get anymore specific than that.
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