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Personnaliser en ajoutant son logo, sa bannière ou son image de fond
5 septembre 2013, parCertains thèmes prennent en compte trois éléments de personnalisation : l’ajout d’un logo ; l’ajout d’une bannière l’ajout d’une image de fond ;
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La file d’attente de SPIPmotion
28 novembre 2010, parUne file d’attente stockée dans la base de donnée
Lors de son installation, SPIPmotion crée une nouvelle table dans la base de donnée intitulée spip_spipmotion_attentes.
Cette nouvelle table est constituée des champs suivants : id_spipmotion_attente, l’identifiant numérique unique de la tâche à traiter ; id_document, l’identifiant numérique du document original à encoder ; id_objet l’identifiant unique de l’objet auquel le document encodé devra être attaché automatiquement ; objet, le type d’objet auquel (...) -
Les vidéos
21 avril 2011, parComme les documents de type "audio", Mediaspip affiche dans la mesure du possible les vidéos grâce à la balise html5 .
Un des inconvénients de cette balise est qu’elle n’est pas reconnue correctement par certains navigateurs (Internet Explorer pour ne pas le nommer) et que chaque navigateur ne gère en natif que certains formats de vidéos.
Son avantage principal quant à lui est de bénéficier de la prise en charge native de vidéos dans les navigateur et donc de se passer de l’utilisation de Flash et (...)
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How HSBC and ING are transforming banking with AI
9 novembre 2024, par Daniel Crough — Banking and Financial Services, Featured Banking ContentWe recently partnered with FinTech Futures to produce an exciting webinar discussing how analytics leaders from two global banks are using AI to protect customers, streamline operations, and support environmental goals.
Watch the on-demand webinar : Advancing analytics maturity.
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</script>Meet the expert panel
Roshini Johri heads ESG Analytics at HSBC, where she leads AI and remote sensing applications supporting the bank’s net zero goals. Her expertise spans climate tech and financial services, with a focus on scalable analytics solutions.
Marco Li Mandri leads Advanced Analytics Strategy at ING, where he focuses on delivering high-impact solutions and strengthening analytics foundations. His background combines analytics, KYC operations, and AI strategy.
Carmen Soini Tourres works as a Web Analyst Consultant at Matomo, helping financial organisations optimise their digital presence whilst maintaining privacy compliance.Key findings from the webinar
The discussion highlighted four essential elements for advancing analytics capabilities :
1. Strong data foundations matter most
“It doesn’t matter how good the AI model is. It is garbage in, garbage out,”
Johri explained. Banks need robust data governance that works across different regulatory environments.
2. Transform rather than tweak
Li Mandri emphasised the need to reconsider entire processes :
“We try to look at the banking domain and processes and try to re-imagine how they should be done with AI.”
3. Bridge technical and business understanding
Both leaders stressed the value of analytics translators who understand both technology and business needs.
“We’re investing in this layer we call product leads,”
Li Mandri explained. These roles combine technical knowledge with business acumen – a rare but vital skill set.
4. Consider production costs early
Moving from proof-of-concept to production requires careful planning. As Johri noted :
“The scale of doing things in production is quite massive and often doesn’t get accounted for in the cost.”
This includes :
- Ongoing monitoring requirements
- Maintenance needs
- Regulatory compliance checks
- Regular model updates
Real-world applications
ING’s approach demonstrates how banks can transform their operations through thoughtful AI implementation. Li Mandri shared several areas where the bank has successfully deployed analytics solutions, each benefiting both the bank and its customers.
Customer experience enhancement
The bank’s implementation of AI-powered instant loan processing shows how analytics can transform traditional banking.
“We know AI can make loans instant for the customer, that’s great. Clicking one button and adding a loan, that really changes things,”
Li Mandri explained. This goes beyond automation – it represents a fundamental shift in how banks serve their customers.
The system analyses customer data to make rapid lending decisions while maintaining strong risk assessment standards. For customers, this means no more lengthy waiting periods or complex applications. For the bank, it means more efficient resource use and better risk management.
The bank also uses AI to personalise customer communications.
“We’re using that to make certain campaigns more personalised, having a certain tone of voice,”
noted Li Mandri. This particularly resonates with younger customers who expect relevant, personalised interactions from their bank.
Operational efficiency transformation
ING’s approach to Know Your Customer (KYC) processes shows how AI can transform resource-heavy operations.
“KYC is a big area of cost for the bank. So we see massive value there, a lot of scale,”
Li Mandri explained. The bank developed an AI-powered system that :
- Automates document verification
- Flags potential compliance issues for human review
- Maintains consistent standards across jurisdictions
- Reduces processing time while improving accuracy
This implementation required careful consideration of regulations across different markets. The bank developed monitoring systems to ensure their AI models maintain high accuracy while meeting compliance standards.
In the back office, ING uses AI to extract and process data from various documents, significantly reducing manual work. This automation lets staff focus on complex tasks requiring human judgment.
Sustainable finance initiatives
ING’s commitment to sustainable banking has driven innovative uses of AI in environmental assessment.
“We have this ambition to be a sustainable bank. If you want to be a sustainable finance customer, that requires a lot of work to understand who the company is, always comparing against its peers.”
The bank developed AI models that :
- Analyse company sustainability metrics
- Compare environmental performance against industry benchmarks
- Assess transition plans for high-emission industries
- Monitor ongoing compliance with sustainability commitments
This system helps staff evaluate the environmental impact of potential deals quickly and accurately.
“We are using AI there to help our frontline process customers to see how green that deal might be and then use that as a decision point,”
Li Mandri noted.
HSBC’s innovative approach
Under Johri’s leadership, HSBC has developed several groundbreaking uses of AI and analytics, particularly in environmental monitoring and operational efficiency. Their work shows how banks can use advanced technology to address complex global challenges while meeting regulatory requirements.
Environmental monitoring through advanced technology
HSBC uses computer vision and satellite imagery analysis to measure environmental impact with new precision.
“This is another big research area where we look at satellite images and we do what is called remote sensing, which is the study of a remote area,”
Johri explained.
The system provides several key capabilities :
- Analysis of forest coverage and deforestation rates
- Assessment of biodiversity impact in specific regions
- Monitoring of environmental changes over time
- Measurement of environmental risk in lending portfolios
“We can look at distant images of forest areas and understand how much percentage deforestation is being caused in that area, and we can then measure our biodiversity impact more accurately,”
Johri noted. This technology enables HSBC to :
- Make informed lending decisions
- Monitor environmental commitments of borrowers
- Support sustainability-linked lending programmes
- Provide accurate environmental impact reporting
Transforming document analysis
HSBC is tackling one of banking’s most time-consuming challenges : processing vast amounts of documentation.
“Can we reduce the onus of human having to go and read 200 pages of sustainability reports each time to extract answers ?”
Johri asked. Their solution combines several AI technologies to make this process more efficient while maintaining accuracy.
The bank’s approach includes :
- Natural language processing to understand complex documents
- Machine learning models to extract relevant information
- Validation systems to ensure accuracy
- Integration with existing compliance frameworks
“We’re exploring solutions to improve our reporting, but we need to do it in a safe, robust and transparent way.”
This careful balance between efficiency and accuracy exemplifies HSBC’s approach to AI.
Building future-ready analytics capabilities
Both banks emphasise that successful analytics requires a comprehensive, long-term approach. Their experiences highlight several critical considerations for financial institutions looking to advance their analytics capabilities.
Developing clear governance frameworks
“Understanding your AI risk appetite is crucial because banking is a highly regulated environment,”
Johri emphasised. Banks need to establish governance structures that :
- Define acceptable uses for AI
- Establish monitoring and control mechanisms
- Ensure compliance with evolving regulations
- Maintain transparency in AI decision-making
Creating solutions that scale
Li Mandri stressed the importance of building systems that grow with the organisation :
“When you try to prototype a model, you have to take care about the data safety, ethical consideration, you have to identify a way to monitor that model. You need model standard governance.”
Successful scaling requires :
- Standard approaches to model development
- Clear evaluation frameworks
- Simple processes for model updates
- Strong monitoring systems
- Regular performance reviews
Investing in people and skills
Both leaders highlighted how important skilled people are to analytics success.
“Having a good hiring strategy as well as creating that data literacy is really important,”
Johri noted. Banks need to :
- Develop comprehensive training programmes
- Create clear career paths for analytics professionals
- Foster collaboration between technical and business teams
- Build internal expertise in emerging technologies
Planning for the future
Looking ahead, both banks are preparing for increased regulation and growing demands for transparency. Key focus areas include :
- Adapting to new privacy regulations
- Making AI decisions more explainable
- Improving data quality and governance
- Strengthening cybersecurity measures
Practical steps for financial institutions
The experiences shared by HSBC and ING provide valuable insights for financial institutions at any stage of their analytics journey. Their successes and challenges outline a clear path forward.
Key steps for success
Financial institutions looking to enhance their analytics capabilities should :
- Start with strong foundations
- Invest in clear data governance frameworks
- Set data quality standards
- Build thorough documentation processes
- Create transparent data tracking
- Think strategically about AI implementation
- Focus on transformative rather than small changes
- Consider the full costs of AI projects
- Build solutions that can grow
- Balance innovation with risk management
- Invest in people and processes
- Develop internal analytics expertise
- Create clear paths for career growth
- Foster collaboration between technical and business teams
- Build a culture of data literacy
- Plan for scale
- Establish monitoring systems
- Create governance frameworks
- Develop standard approaches to model development
- Stay flexible for future regulatory changes
Learn more
Want to hear more insights from these industry leaders ? Watch the complete webinar recording on demand. You’ll learn :
- Detailed technical insights from both banks
- Extended Q&A with the speakers
- Additional case studies and examples
- Practical implementation advice
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Watch the on-demand webinar : Advancing analytics maturity.
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</script> -
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.
-
MOV to ACVHD conversion via Spring Boot and FFmpeg leads to file system error
31 décembre 2024, par epicUsernameI am experiencing an issue on a personal project that seeks to convert HEIC to JPG files and MOV files to AVCHD format. The HEIC to JPG conversion works, but the MOV to AVCHD does not, which is where my problems lie.


The intent is to do this with Spring Boot and FFmpeg, using a simple interface done in WindowBuilder.


The relevant bits are the pom file :


<dependencies>
 
 
 <dependency>
 <groupid>jmagick</groupid>
 <artifactid>jmagick</artifactid>
 <version>6.6.9</version>
 </dependency>

 
 <dependency>
 <groupid>net.java.dev.jna</groupid>
 <artifactid>jna</artifactid>
 <version>5.7.0</version> 
 </dependency>
 <dependency>
 <groupid>net.java.dev.jna</groupid>
 <artifactid>jna-platform</artifactid>
 <version>5.7.0</version>
 </dependency>
 
 


 <dependency>
 <groupid>org.bytedeco</groupid>
 <artifactid>ffmpeg</artifactid>
 <version>7.1-1.5.11</version>
 </dependency>
 <dependency>
 <groupid>org.bytedeco</groupid>
 <artifactid>javacv</artifactid>
 <version>1.5.11</version>
 </dependency>
 <dependency>
 <groupid>org.bytedeco</groupid>
 <artifactid>ffmpeg-platform</artifactid>
 <version>7.1-1.5.11</version>
 </dependency>
 
 <dependency>
 <groupid>org.bytedeco</groupid>
 <artifactid>javacpp</artifactid>
 <version>1.5.11</version>
 </dependency>
 </dependencies>



and the main file with the event handling for the application, based on the interface :


package home.multimeida.mmconverter;

imports...

public class MMConverterInterface extends JFrame {

 public static void main(String[] args) {
 
 
 try {
 System.setProperty("jna.library.path", "absolute/path/to/gstreamer/bin");
 // Gst.init("GStreamer Test");
 System.out.println("GStreamer initialized successfully.");
 } catch (Exception e) {
 e.printStackTrace();
 System.out.println("Failed to initialize GStreamer.");
 }
 EventQueue.invokeLater(new Runnable() {
 public void run() {
 try {
 MMConverterInterface frame = new MMConverterInterface();
 frame.setVisible(true);
 } catch (Exception e) {
 e.printStackTrace();
 }
 }
 });
 }

 /**
 * Create the frame.
 */
 public MMConverterInterface() {
 
 // convert button
 
 btnConvert.addActionListener(e -> {
 
 try {
 
 if (sourceFileLabel.getText().equals("No file chosen...") || destinationFolderLabel.getText().equals("No folder selected...")) {
 JOptionPane.showMessageDialog(null, "Please select both an input file and a save location.", "Validation Error", JOptionPane.WARNING_MESSAGE);
 return;
 }
 
 File sourceFile = new File(sourceFileLabel.getText());
 File destinationFile;
 
 if (rdbtnNewRadioButton.isSelected()) {
 
 System.out.println("Converting HEIC to JPG...");
 
 String outputFileName = sourceFile.getName().replaceFirst("[.][^.]+$", ".jpg");
 
 // Call your conversion logic here
 
 destinationFile = new File(destinationFolderLabel.getText(), outputFileName);
 
 convertHeicToJpg(sourceFile, destinationFile);
 
 } else if (rdbtnNewRadioButton_1.isSelected()) {
 
 if (sourceFileLabel.getText().equals("No file chosen...") || destinationFolderLabel.getText().equals("No folder selected...")) {
 JOptionPane.showMessageDialog(null, "Please select both an input file and a save location.", "Validation Error", JOptionPane.WARNING_MESSAGE);
 return;
 }
 
 // Validate source file
 if (!sourceFile.exists() || !sourceFile.canRead()) {
 JOptionPane.showMessageDialog(null, "Source file does not exist or is not readable.", "File Error", JOptionPane.ERROR_MESSAGE);
 return;
 }
 
 // Validate destination folder
 String destinationPath = destinationFolderLabel.getText();
 if (destinationPath == null || destinationPath.isEmpty() || !(new File(destinationPath).isDirectory())) {
 JOptionPane.showMessageDialog(null, "Invalid destination folder.", "File Error", JOptionPane.ERROR_MESSAGE);
 return;
 }
 
 System.out.println("Converting MOV to AVCHD...");
 
 String currentDate = new SimpleDateFormat("yyyyMMdd").format(new Date());

 // Extract the file name without the extension
 String baseName = sourceFile.getName().replaceFirst("[.][^.]+$", "");

 // Sanitize the base name (replace invalid characters with '_')
 baseName = baseName.replaceAll("[^a-zA-Z0-9-_]", "_");
 
 String sanitizedFileName = baseName + "_" + currentDate;
 sanitizedFileName = sanitizedFileName.replaceAll("[^a-zA-Z0-9._-]", "_"); // Allow alphanumeric, '-', '_', and '.'

 destinationFile = new File(destinationPath, sanitizedFileName);
 
 
 /*
 // Ensure the destination file is writable
 if (!destinationFile.canWrite()) {
 JOptionPane.showMessageDialog(null, "Output file is not writable.", "File Error", JOptionPane.ERROR_MESSAGE);
 return;
 }
 */
 

 convertMovToAvchd(sourceFile, destinationFile);
 
 } else {
 
 JOptionPane.showMessageDialog(null, "Please select a conversion type.");
 
 }
 
 } catch (Exception ex) {
 
 JOptionPane.showMessageDialog(null, "Error: " + ex.getMessage(), "Conversion Error", JOptionPane.ERROR_MESSAGE);
 ex.printStackTrace();
 }
 
 
 });
 
 // cancel button:
 
 btnCancel.addActionListener(e -> {
 System.out.println("Operation canceled.");
 System.exit(0); // Close the application
 });

 }
 
 public void convertMovToAvchd(File sourceFile, File destinationFile) {
 avutil.av_log_set_level(avutil.AV_LOG_DEBUG);
 
 

 AVFormatContext inputFormatContext = null;
 AVFormatContext outputFormatContext = new AVFormatContext(null);
 AVCodecContext inputCodecContext = null;
 AVCodecContext outputCodecContext = null;

 try {
 // Validate input file
 if (!sourceFile.exists() || !sourceFile.canRead()) {
 System.out.println("Source file does not exist or is not readable: " + sourceFile.getAbsolutePath());
 return;
 }
 
 // Validate output file path using the validateFileCreation method
 if (!validateFileCreation(destinationFile)) {
 return; // Exit if destination file validation fails
 }

 // Validate output file path
 if (destinationFile.getParentFile() == null || !destinationFile.getParentFile().exists()) {
 System.out.println("Output directory does not exist: " + destinationFile.getParentFile());
 return;
 }
 if (!destinationFile.getParentFile().canWrite()) {
 System.out.println("Output directory is not writable: " + destinationFile.getParentFile());
 return;
 }

 // Open input file
 inputFormatContext = avformat.avformat_alloc_context();
 if (avformat.avformat_open_input(inputFormatContext, sourceFile.getAbsolutePath(), null, null) < 0) {
 System.out.println("Failed to open input file: " + sourceFile.getAbsolutePath());
 return;
 }

 // Find stream information
 if (avformat.avformat_find_stream_info(inputFormatContext, (PointerPointer) null) < 0) {
 System.out.println("Failed to retrieve input stream information.");
 return;
 }

 // Find video stream
 int videoStreamIndex = avformat.av_find_best_stream(inputFormatContext, avutil.AVMEDIA_TYPE_VIDEO, -1, -1, (AVCodec) null, 0);
 if (videoStreamIndex < 0) {
 System.out.println("Failed to find video stream in input file.");
 return;
 }

 // Initialize input codec context
 inputCodecContext = avcodec.avcodec_alloc_context3(null);
 avcodec.avcodec_parameters_to_context(inputCodecContext, inputFormatContext.streams(videoStreamIndex).codecpar());

 AVCodec decoder = avcodec.avcodec_find_decoder(inputCodecContext.codec_id());
 if (decoder == null || avcodec.avcodec_open2(inputCodecContext, decoder, (PointerPointer) null) < 0) {
 System.out.println("Failed to open video decoder.");
 return;
 }

 // Allocate output format context
 if (avformat.avformat_alloc_output_context2(outputFormatContext, null, "mpegts", destinationFile.getAbsolutePath()) < 0) {
 System.out.println("Failed to allocate output format context.");
 return;
 }

 // Initialize output codec
 AVCodec encoder = avcodec.avcodec_find_encoder_by_name("mpeg2video");
 if (encoder == null) {
 System.out.println("Failed to find MPEG2 video encoder.");
 return;
 }

 outputCodecContext = avcodec.avcodec_alloc_context3(encoder);
 if (outputCodecContext == null) {
 System.out.println("Failed to allocate output codec context.");
 return;
 }
 
 if ((outputFormatContext.oformat().flags() & avformat.AVFMT_GLOBALHEADER) != 0) {
 outputCodecContext.flags(outputCodecContext.flags() | avcodec.AV_CODEC_FLAG_GLOBAL_HEADER);
 }


 //outputCodecContext.codec_id(avcodec.AV_CODEC_ID_MPEG2VIDEO);
 outputCodecContext.codec_id(encoder.id());
 outputCodecContext.codec_type(avutil.AVMEDIA_TYPE_VIDEO);
 outputCodecContext.width(1920);
 outputCodecContext.height(1080);
 outputCodecContext.pix_fmt(avutil.AV_PIX_FMT_YUV420P);
 outputCodecContext.time_base(avutil.av_make_q(1, 25));
 outputCodecContext.bit_rate(4000000);
 outputCodecContext.gop_size(12);

 if ((outputFormatContext.oformat().flags() & avformat.AVFMT_GLOBALHEADER) != 0) {
 outputCodecContext.flags(outputCodecContext.flags() | avcodec.AV_CODEC_FLAG_GLOBAL_HEADER);
 }

 
 
 if (avcodec.avcodec_open2(outputCodecContext, encoder, (PointerPointer) null) < 0) {
 System.out.println("Failed to open video encoder.");
 return;
 }

 // Create output stream
 AVStream videoStream = avformat.avformat_new_stream(outputFormatContext, encoder);
 if (videoStream == null) {
 System.out.println("Failed to create video stream.");
 return;
 }

 avcodec.avcodec_parameters_from_context(videoStream.codecpar(), outputCodecContext);
 
 System.out.println("Destination file path before trying to open the file is: " + destinationFile);

 if ((outputFormatContext.oformat().flags() & avformat.AVFMT_NOFILE) == 0) {
 // Ensure the output path has the correct extension
 String outputPath = destinationFile.getAbsolutePath().replace("\\", "/") + ".avchd";
 System.out.println("Normalized output path: " + outputPath);

 // Try opening the output file
 int ret = avformat.avio_open(outputFormatContext.pb(), outputPath, avformat.AVIO_FLAG_WRITE);
 if (ret < 0) {
 BytePointer errorBuffer = new BytePointer(avutil.AV_ERROR_MAX_STRING_SIZE);
 avutil.av_strerror(ret, errorBuffer, errorBuffer.capacity());
 System.out.println("Failed to open output file: " + errorBuffer.getString());
 return;
 }
 }


 // Write header
 if (avformat.avformat_write_header(outputFormatContext, (PointerPointer) null) < 0) {
 System.out.println("Failed to write header to output file.");
 return;
 }


 // Packet processing loop
 AVPacket packet = new AVPacket();
 while (avformat.av_read_frame(inputFormatContext, packet) >= 0) {
 if (packet.stream_index() == videoStreamIndex) {
 if (avcodec.avcodec_send_packet(inputCodecContext, packet) >= 0) {
 AVFrame frame = avutil.av_frame_alloc();
 while (avcodec.avcodec_receive_frame(inputCodecContext, frame) >= 0) {
 if (avcodec.avcodec_send_frame(outputCodecContext, frame) >= 0) {
 AVPacket encodedPacket = new AVPacket();
 while (avcodec.avcodec_receive_packet(outputCodecContext, encodedPacket) >= 0) {
 encodedPacket.stream_index(videoStream.index());
 avformat.av_interleaved_write_frame(outputFormatContext, encodedPacket);
 avcodec.av_packet_unref(encodedPacket);
 }
 }
 avutil.av_frame_unref(frame);
 }
 avutil.av_frame_free(frame);
 }
 }
 avcodec.av_packet_unref(packet);
 }

 // Write trailer
 avformat.av_write_trailer(outputFormatContext);
 System.out.println("Conversion completed successfully.");
 
 if (avcodec.avcodec_send_frame(outputCodecContext, null) >= 0) {
 AVPacket encodedPacket = new AVPacket();
 while (avcodec.avcodec_receive_packet(outputCodecContext, encodedPacket) >= 0) {
 encodedPacket.stream_index(videoStream.index());
 avformat.av_interleaved_write_frame(outputFormatContext, encodedPacket);
 avcodec.av_packet_unref(encodedPacket);
 }
 }

 } catch (Exception e) {
 e.printStackTrace();
 } finally {
 // Cleanup
 avcodec.avcodec_free_context(inputCodecContext);
 avcodec.avcodec_free_context(outputCodecContext);
 avformat.avformat_close_input(inputFormatContext);

 if (outputFormatContext != null && outputFormatContext.pb() != null) {
 avformat.avio_closep(outputFormatContext.pb());
 }
 avformat.avformat_free_context(outputFormatContext);
 }
 }
 
 private boolean validateFileCreation(File destinationFile) {
 // Check if the parent directory exists and is writable
 File parentDir = destinationFile.getParentFile();
 if (parentDir == null || !parentDir.exists()) {
 System.out.println("Parent directory does not exist: " + parentDir);
 return false;
 }
 if (!parentDir.canWrite()) {
 System.out.println("Cannot write to parent directory: " + parentDir);
 return false;
 }

 // Check if the file exists and is writable
 if (destinationFile.exists()) {
 if (!destinationFile.canWrite()) {
 System.out.println("Destination file is not writable: " + destinationFile);
 return false;
 }
 } else {
 // If the file doesn't exist, try to create it to verify writability
 try {
 if (!destinationFile.createNewFile()) {
 System.out.println("Unable to create destination file: " + destinationFile);
 return false;
 }
 // Delete the file after successful creation to avoid residual files
 destinationFile.delete();
 } catch (IOException e) {
 System.out.println("File creation failed: " + e.getMessage());
 return false;
 }
 }

 return true;
 }
 
}




A few caveats :


- 

-
I did explore FFmpeg and GStreamer for this project. GStreamer was inconclusive, with available version for it that were too old for use with my current state of STS4.27 and Java 17, even if this version of Java is under long-term support...


-
I've used AI to tell me about the options and suggest ways to build this thing, since multimedia handling is very far away from my skillset. I don't have a good conceptual grasp of video formats and how they transfrom from one to another.








The issue, as I have identified it, occurs at these lines :


// Ensure the destination file is writable
 if (!destinationFile.canWrite()) {
 JOptionPane.showMessageDialog(null, "Output file is not writable.", "File Error", JOptionPane.ERROR_MESSAGE);
 return;
 }


^^ And this, while temporarily commented out for testing, it meant to compensate for an issue that occurs here in the conversion function :


if ((outputFormatContext.oformat().flags() & avformat.AVFMT_NOFILE) == 0) {
 // Ensure the output path has the correct extension
 String outputPath = destinationFile.getAbsolutePath().replace("\\", "/") + ".avchd";
 System.out.println("Normalized output path: " + outputPath);

 // Try opening the output file
 int ret = avformat.avio_open(outputFormatContext.pb(), outputPath, avformat.AVIO_FLAG_WRITE);
 if (ret < 0) {
 BytePointer errorBuffer = new BytePointer(avutil.AV_ERROR_MAX_STRING_SIZE);
 avutil.av_strerror(ret, errorBuffer, errorBuffer.capacity());
 System.out.println("Failed to open output file: " + errorBuffer.getString());
 return;
 }
 }


The idea here is that the avio_open() function requires the use of the a valid file path that it can open to be able to write it.


Padadoxically, the file conversion seems to work, but the project crashes with a fatal error in the console :


Selected file: E:\TestConveresions\sample_960x540.mov
Save location: E:\TestConveresions
Converting MOV to AVCHD...
Destination file path before trying to open the file is: E:\TestConveresions\sample_960x540_20241231
Normalized output path: E:/TestConveresions/sample_960x540_20241231.avchd
#
# A fatal error has been detected by the Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffcffb0868b, pid=11020, tid=14436
#
# JRE version: OpenJDK Runtime Environment Temurin-21.0.5+11 (21.0.5+11) (build 21.0.5+11-LTS)
# Java VM: OpenJDK 64-Bit Server VM Temurin-21.0.5+11 (21.0.5+11-LTS, mixed mode, emulated-client, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, windows-amd64)
# Problematic frame:
# C 0x00007ffcffb0868b
#
# No core dump will be written. Minidumps are not enabled by default on client versions of Windows
#
# An error report file with more information is saved as:
# E:\STS4 Workspace\MMConverter\hs_err_pid11020.log
[80.882s][warning][os] Loading hsdis library failed
#
# If you would like to submit a bug report, please visit:
# https://github.com/adoptium/adoptium-support/issues
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
[AVFormatContext @ 000002528adcea40] Opening 'E:\TestConveresions\sample_960x540.mov' for reading
[file @ 000002528ae51c40] Setting default whitelist 'file,crypto,data'
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002528adcea40] Format mov,mp4,m4a,3gp,3g2,mj2 probed with size=2048 and score=100
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002528adcea40] ISO: File Type Major Brand: qt 
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002528adcea40] Unknown dref type 0x206c7275 size 12
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002528adcea40] Processing st: 0, edit list 0 - media time: 2002, duration: 400410
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002528adcea40] Offset DTS by 2002 to make first pts zero.
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002528adcea40] Setting codecpar->delay to 2 for stream st: 0
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002528adcea40] Before avformat_find_stream_info() pos: 1320742 bytes read:38225 seeks:1 nb_streams:1
[h264 @ 000002528ae62780] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 000002528ae62780] Decoding VUI
[h264 @ 000002528ae62780] nal_unit_type: 8(PPS), nal_ref_idc: 3
[h264 @ 000002528ae62780] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 000002528ae62780] Decoding VUI
[h264 @ 000002528ae62780] nal_unit_type: 8(PPS), nal_ref_idc: 3
[h264 @ 000002528ae62780] nal_unit_type: 6(SEI), nal_ref_idc: 0
[h264 @ 000002528ae62780] nal_unit_type: 5(IDR), nal_ref_idc: 3
[h264 @ 000002528ae62780] Format yuv420p chosen by get_format().
[h264 @ 000002528ae62780] Reinit context to 960x544, pix_fmt: yuv420p
[h264 @ 000002528ae62780] no picture 
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002528adcea40] All info found
[mov,mp4,m4a,3gp,3g2,mj2 @ 000002528adcea40] After avformat_find_stream_info() pos: 51943 bytes read:90132 seeks:2 frames:1
[h264 @ 000002528ae62780] nal_unit_type: 7(SPS), nal_ref_idc: 3
[h264 @ 000002528ae62780] Decoding VUI
[h264 @ 000002528ae62780] nal_unit_type: 8(PPS), nal_ref_idc: 3
[mpeg2video @ 000002528ae8e700] intra_quant_bias = 96 inter_quant_bias = 0



If I refer to the error log, I get this. It is partial, as I'm not sure SO will take all of it (quite long), but still might have enough to be relevant :


Host: Intel(R) Core(TM) i7-8550U CPU @ 1.80GHz, 8 cores, 31G, Windows 11 , 64 bit Build 26100 (10.0.26100.2454)


--------------- T H R E A D ---------------

Current thread (0x00000252d030b340): JavaThread "AWT-EventQueue-0" [_thread_in_native, id=14436, stack(0x000000a4e2b00000,0x000000a4e2c00000) (1024K)]

Stack: [0x000000a4e2b00000,0x000000a4e2c00000], sp=0x000000a4e2bfdf30, free space=1015k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
C 0x00007ffcffb0868b

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j org.bytedeco.ffmpeg.global.avformat.avio_open(Lorg/bytedeco/ffmpeg/avformat/AVIOContext;Ljava/lang/String;I)I+0
j home.multimeida.mmconverter.MMConverterInterface.convertMovToAvchd(Ljava/io/File;Ljava/io/File;)V+1120
j home.multimeida.mmconverter.MMConverterInterface.lambda$2(Ljavax/swing/JRadioButton;Ljavax/swing/JRadioButton;Ljava/awt/event/ActionEvent;)V+347
j home.multimeida.mmconverter.MMConverterInterface$$Lambda+0x000002528c0c7778.actionPerformed(Ljava/awt/event/ActionEvent;)V+13
j javax.swing.AbstractButton.fireActionPerformed(Ljava/awt/event/ActionEvent;)V+84 java.desktop@21.0.5
j javax.swing.AbstractButton$Handler.actionPerformed(Ljava/awt/event/ActionEvent;)V+5 java.desktop@21.0.5
j javax.swing.DefaultButtonModel.fireActionPerformed(Ljava/awt/event/ActionEvent;)V+34 java.desktop@21.0.5
j javax.swing.DefaultButtonModel.setPressed(Z)V+117 java.desktop@21.0.5
j javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Ljava/awt/event/MouseEvent;)V+35 java.desktop@21.0.5
j java.awt.Component.processMouseEvent(Ljava/awt/event/MouseEvent;)V+64 java.desktop@21.0.5
j javax.swing.JComponent.processMouseEvent(Ljava/awt/event/MouseEvent;)V+23 java.desktop@21.0.5
J 2581 c1 java.awt.Component.processEvent(Ljava/awt/AWTEvent;)V java.desktop@21.0.5 (220 bytes) @ 0x00000252fa62719c [0x00000252fa627020+0x000000000000017c]
J 2580 c1 java.awt.Container.processEvent(Ljava/awt/AWTEvent;)V java.desktop@21.0.5 (22 bytes) @ 0x00000252fa627d9c [0x00000252fa627cc0+0x00000000000000dc]
J 2406 c1 java.awt.Component.dispatchEventImpl(Ljava/awt/AWTEvent;)V java.desktop@21.0.5 (785 bytes) @ 0x00000252fa670f14 [0x00000252fa670040+0x0000000000000ed4]
J 2325 c1 java.awt.Container.dispatchEventImpl(Ljava/awt/AWTEvent;)V java.desktop@21.0.5 (129 bytes) @ 0x00000252fa64e93c [0x00000252fa64e8a0+0x000000000000009c]
J 2608 c1 java.awt.LightweightDispatcher.retargetMouseEvent(Ljava/awt/Component;ILjava/awt/event/MouseEvent;)V java.desktop@21.0.5 (372 bytes) @ 0x00000252fa61c364 [0x00000252fa61b9e0+0x0000000000000984]
J 2578 c1 java.awt.LightweightDispatcher.processMouseEvent(Ljava/awt/event/MouseEvent;)Z java.desktop@21.0.5 (268 bytes) @ 0x00000252fa628a54 [0x00000252fa6284c0+0x0000000000000594]
J 2474 c1 java.awt.LightweightDispatcher.dispatchEvent(Ljava/awt/AWTEvent;)Z java.desktop@21.0.5 (73 bytes) @ 0x00000252fa699bbc [0x00000252fa699a60+0x000000000000015c]
J 2325 c1 java.awt.Container.dispatchEventImpl(Ljava/awt/AWTEvent;)V java.desktop@21.0.5 (129 bytes) @ 0x00000252fa64e914 [0x00000252fa64e8a0+0x0000000000000074]
J 2473 c1 java.awt.Window.dispatchEventImpl(Ljava/awt/AWTEvent;)V java.desktop@21.0.5 (23 bytes) @ 0x00000252fa699654 [0x00000252fa6994e0+0x0000000000000174]
J 1838 c1 java.awt.EventQueue.dispatchEventImpl(Ljava/awt/AWTEvent;Ljava/lang/Object;)V java.desktop@21.0.5 (139 bytes) @ 0x00000252fa3bec64 [0x00000252fa3beb20+0x0000000000000144]
J 1837 c1 java.awt.EventQueue$4.run()Ljava/lang/Void; java.desktop@21.0.5 (60 bytes) @ 0x00000252fa3c0504 [0x00000252fa3c0460+0x00000000000000a4]
J 1836 c1 java.awt.EventQueue$4.run()Ljava/lang/Object; java.desktop@21.0.5 (5 bytes) @ 0x00000252fa3c0a04 [0x00000252fa3c09c0+0x0000000000000044]
J 1778 c1 java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Ljava/security/PrivilegedAction;Ljava/security/AccessControlContext;Ljava/security/AccessControlContext;)Ljava/lang/Object; java.base@21.0.5 (22 bytes) @ 0x00000252fa4601d4 [0x00000252fa45ffa0+0x0000000000000234]
J 1832 c1 java.awt.EventQueue.dispatchEvent(Ljava/awt/AWTEvent;)V java.desktop@21.0.5 (80 bytes) @ 0x00000252fa44f14c [0x00000252fa44eae0+0x000000000000066c]
J 1846 c1 java.awt.EventDispatchThread.pumpOneEventForFilters(I)V java.desktop@21.0.5 (106 bytes) @ 0x00000252fa3ba544 [0x00000252fa3ba2e0+0x0000000000000264]
j java.awt.EventDispatchThread.pumpEventsForFilter(ILjava/awt/Conditional;Ljava/awt/EventFilter;)V+35 java.desktop@21.0.5
j java.awt.EventDispatchThread.pumpEventsForHierarchy(ILjava/awt/Conditional;Ljava/awt/Component;)V+11 java.desktop@21.0.5
j java.awt.EventDispatchThread.pumpEvents(ILjava/awt/Conditional;)V+4 java.desktop@21.0.5
j java.awt.EventDispatchThread.pumpEvents(Ljava/awt/Conditional;)V+3 java.desktop@21.0.5
j java.awt.EventDispatchThread.run()V+9 java.desktop@21.0.5
v ~StubRoutines::call_stub 0x00000252fa08100d

siginfo: EXCEPTION_ACCESS_VIOLATION (0xc0000005), writing address 0x0000000000000000



If anyone has a perspective on this, it'd be appreciated.


The catch 22 in this project is that pre-creating the file is not a good idea, since avio_open has a purpose in-built method for that (I tried). Error checking everything about Java's File class in terms of setting pathways and creating and deleting files is not problematic. Likewise, permissions are all fine (Full Control in source and target folders) ; I've tested default C drive folders, which have restritions, to a separate volume and removable media, to no effect. Likewise, FFmpeg requires a forward slash, "/" in file paths, whereas Java does the backslash, generally. That's been handled with the replace method in the above conditioning, also to no effect.


The basic contradiction in the project seems to be that the error tries open a file that does not exist, with a valid source and destination file, and if I try to create a placeholder file wiht an acvhd extension at the event handling for the Convert button, it still errors out ; meanwhile, FFmpeg allegedly handles the file creation at its core, but requires a valid path to be passed ; I've tried with and without a filename, with and without an extension. I'm not able to resovle it.


The excessive error handling conditions are in an effort to isolate the problem, which I think I've done.


There also seems to be a compatibility between mpegts and acvhd, which is why I also had that format specified in the conversion function, without result.


I also have the idea to be able to do this without having to install any libraries locally or having to set path variables, which is an aspect that both GStreamer and FFmpeg have.


Nearest suggestion I've found is this : integrate ffmpeg with spring boot


AI remains hopeless for resolving this issue.


-
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