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Autres articles (89)
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MediaSPIP v0.2
21 juin 2013, parMediaSPIP 0.2 est la première version de MediaSPIP stable.
Sa date de sortie officielle est le 21 juin 2013 et est annoncée ici.
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Comme pour la version précédente, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...) -
Le profil des utilisateurs
12 avril 2011, parChaque utilisateur dispose d’une page de profil lui permettant de modifier ses informations personnelle. Dans le menu de haut de page par défaut, un élément de menu est automatiquement créé à l’initialisation de MediaSPIP, visible uniquement si le visiteur est identifié sur le site.
L’utilisateur a accès à la modification de profil depuis sa page auteur, un lien dans la navigation "Modifier votre profil" est (...) -
MediaSPIP version 0.1 Beta
16 avril 2011, parMediaSPIP 0.1 beta est la première version de MediaSPIP décrétée comme "utilisable".
Le fichier zip ici présent contient uniquement les sources de MediaSPIP en version standalone.
Pour avoir une installation fonctionnelle, il est nécessaire d’installer manuellement l’ensemble des dépendances logicielles sur le serveur.
Si vous souhaitez utiliser cette archive pour une installation en mode ferme, il vous faudra également procéder à d’autres modifications (...)
Sur d’autres sites (15999)
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Frames from Video Using OpenCV in Ubuntu with Java 17
2 août 2023, par bstrdnI've been trying to extract frames from a video using OpenCV in an Ubuntu environment with Java 17, but all my attempts have been unsuccessful so far. The main issue is that ffmpeg is not detected by the OpenCV library on ubuntu.


Here's my test code :


Main class


import org.opencv.core.Core;
import org.opencv.videoio.VideoCapture;

public class Main {
 public static String videoPath = "";
 static {
 String osName = System.getProperty("os.name").toLowerCase();
 if (osName.contains("win")) {
 System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
 videoPath = ClassLoader.getSystemResource("video.mp4").getPath();
 } else {
 videoPath = "/video.mp4";
// System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
 System.load("/usr/lib/opencv_java470.so");
 }
 }

 public static void main(String[] args) throws InterruptedException {
 VideoCapture videoCapture = new VideoCapture(videoPath);
 if (!videoCapture.isOpened()) {
 System.out.println("Error opening video file.");
 } else {
 System.out.println("Everything is fine.");
 }
 System.out.println(Core.getBuildInformation());
 Thread.sleep(1000000000000000000L);
 }
}


Maven :


<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0">
 <modelversion>4.0.0</modelversion>
 <parent>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-starter-parent</artifactid>
 <version>3.0.2</version>
 <relativepath></relativepath> 
 </parent>
 <groupid>org.example</groupid>
 <artifactid>untitled</artifactid>
 <version>1.0-SNAPSHOT</version>
 <properties>
 17
 17
 UTF-8
 </properties>

<dependencies>
<dependency>
 <groupid>org.bytedeco</groupid>
 <artifactid>opencv-platform</artifactid>
 <version>4.7.0-1.5.9</version>
</dependency>

<dependency>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-starter-web</artifactid>
</dependency>
</dependencies>
<build>
<plugins>
 <plugin>
 <groupid>org.springframework.boot</groupid>
 <artifactid>spring-boot-maven-plugin</artifactid>
 </plugin>
</plugins>
</build>
</project>


Dockerfile :


FROM ubuntu:20.04
RUN apt-get update && apt-get install -y openjdk-17-jdk
RUN apt-get update && apt-get install -y pkg-config
RUN apt-get update && apt-get install -y ffmpeg libavformat-dev libavcodec-dev libswscale-dev libavresample-dev
ENV JAVA_HOME /usr/lib/jvm/java-17-openjdk-amd64
COPY target/*.jar /app.jar
COPY src/main/resources/video.mp4 /
COPY opencv_java470.so /usr/lib
ENV JAVA_TOOL_OPTIONS="-Djava.library.path=/usr/lib:/lib:/usr/local/lib:/usr/local:/usr/lib/x86_64-linux-gnu"
ENV LD_LIBRARY_PATH=/usr/lib:/lib:/usr/local/lib:/usr/local:/usr/lib/x86_64-linux-gnu
ENTRYPOINT [ "sh", "-c", "java $JAVA_TOOL_OPTIONS -jar /app.jar" ]


The application displays the following text (video is not opened) :


Error opening video file.

2023-08-02T13:30:58.448538297Z 
2023-08-02T13:30:58.448572597Z General configuration for OpenCV 4.7.0 =====================================
2023-08-02T13:30:58.448587327Z Version control: v4.7.0
2023-08-02T13:30:58.448590607Z 
2023-08-02T13:30:58.448593217Z Platform:
2023-08-02T13:30:58.448596057Z Timestamp: 2023-03-27T23:13:34Z
2023-08-02T13:30:58.448598747Z Host: Linux 5.4.0-1103-azure x86_64
2023-08-02T13:30:58.448601377Z CMake: 3.25.2
2023-08-02T13:30:58.448604277Z CMake generator: Unix Makefiles
2023-08-02T13:30:58.448606837Z CMake build tool: /usr/bin/make
2023-08-02T13:30:58.448609327Z Configuration: RELEASE
2023-08-02T13:30:58.448611867Z 
.......there is a lot of text......
2023-08-02T13:30:58.448772865Z 
2023-08-02T13:30:58.448775355Z Video I/O:
2023-08-02T13:30:58.448777845Z DC1394: NO
2023-08-02T13:30:58.448780535Z FFMPEG: NO
2023-08-02T13:30:58.448783105Z avcodec: NO
2023-08-02T13:30:58.448785725Z avformat: NO
2023-08-02T13:30:58.448788295Z avutil: NO
2023-08-02T13:30:58.448790755Z swscale: NO
2023-08-02T13:30:58.448793295Z avresample: NO
2023-08-02T13:30:58.448795845Z GStreamer: NO
2023-08-02T13:30:58.448798255Z v4l/v4l2: YES (linux/videodev2.h)
2023-08-02T13:30:58.448800885Z 
2023-08-02T13:30:58.448803525Z Parallel framework: pthreads
2023-08-02T13:30:58.448806345Z 
............
2023-08-02T13:30:58.448859654Z Java: export all functions
2023-08-02T13:30:58.448862024Z ant: /usr/bin/ant (ver 1.10.5)
2023-08-02T13:30:58.448864504Z JNI: /opt/hostedtoolcache/jdk/8.0.362/x64/include /opt/hostedtoolcache/jdk/8.0.362/x64/include/linux /opt/hostedtoolcache/jdk/8.0.362/x64/include
2023-08-02T13:30:58.448867224Z Java wrappers: YES
2023-08-02T13:30:58.448869804Z Java tests: NO
2023-08-02T13:30:58.448872314Z 
2023-08-02T13:30:58.448874734Z Install to: /usr/local


Moreover, ffmpeg is installed on Ubuntu.


How can i fix this ? I'm deathly tired(


Thank you in advance for your assistance !


First I tried installation following the official instructions.https://github.com/bytedeco/javacv#required-software


Then the solution provided in https://stackoverflow.com/a/76750478/8087508,


but the result is the same.


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FFMpeg command line to create specific MPD Manifest
22 février 2024, par Seth HabermanI have tried to get an FFMpeg command to yield the below manifest. Right below is the FFmpeg command that I have tried to make but it has not created the same manifest file as what I am trying to replicate a stream from a third party system to add my own stream to their system so that it will actually play back.


"$ffmpeg_path" \
 -i "$input_file" \
 -r 30000/1001 \
 -vf "scale=3840:1080" \
 -c:v libx265 \
 -c:a aac -b:a 128k \
 -ar 48000 \
 -f dash \
 -use_timeline 1 \
 -use_template 1 \
 -init_seg_name "init-stream\$RepresentationID\$.m4s" \
 -media_seg_name "chunk-stream\$RepresentationID\$-\$Number%05d\$.m4s" \
 -seg_duration 3 \
 "$output_file"


The code above yields a manifest that is structured like below.


<?xml version="1.0" encoding="utf-8"?>
<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" mediapresentationduration="PT1M35.1S" maxsegmentduration="PT3.0S" minbuffertime="PT16.8S">
 <programinformation>
 </programinformation>
 <servicedescription>
 </servicedescription>
 <period start="PT0.0S">
 <adaptationset contenttype="video" startwithsap="1" segmentalignment="true" bitstreamswitching="true" framerate="30000/1001" maxwidth="3840" maxheight="1080" par="32:9">
 <representation mimetype="video/mp4" codecs="hev1" bandwidth="2227590" width="3840" height="1080" sar="1:1">
 <segmenttemplate timescale="30000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
 <segmenttimeline>
 <s t="0" d="247247"></s>
 <s d="250250" r="9"></s>
 <s d="104104"></s>
 </segmenttimeline>
 </segmenttemplate>
 </representation>
 </adaptationset>
 <adaptationset contenttype="audio" startwithsap="1" segmentalignment="true" bitstreamswitching="true">
 <representation mimetype="audio/mp4" codecs="mp4a.40.2" bandwidth="128000" audiosamplingrate="48000">
 <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="1"></audiochannelconfiguration>
 <segmenttemplate timescale="48000" initialization="init-stream$RepresentationID$.m4s" media="chunk-stream$RepresentationID$-$Number%05d$.m4s" startnumber="1">
 <segmenttimeline>
 <s t="0" d="143360"></s>
 <s d="144384" r="29"></s>
 <s d="93120"></s>
 </segmenttimeline>
 </segmenttemplate>
 </representation>
 </adaptationset>
 </period>
</mpd>



The problem is that I I need it to create a stream where the manifest looks like the manifest below. If it doesn't look or function as below, it will not playback correctly on this third parties system.


<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<mpd xmlns="urn:mpeg:dash:schema:mpd:2011" profiles="urn:mpeg:dash:profile:isoff-live:2011" type="static" mediapresentationduration="PT1M35.7S" minbuffertime="PT5.9S">
 <programinformation></programinformation>
 <period start="PT0.0S">
 <adaptationset contenttype="video" segmentalignment="true" bitstreamswitching="true">
 <representation bandwidth="12000000" width="3840" height="1080" framerate="30000/1001" mimetype="video/mp4" codecs="hev1">
 <segmenttemplate media="chunk-stream$RepresentationID$-$Number%05d$.m4s" initialization="init-stream$RepresentationID$.m4s" startnumber="1" timescale="30000">
 <segmenttimeline>
 <s t="0" d="89089" r="31"></s>
 <s d="21021"></s>
 </segmenttimeline>
 </segmenttemplate>
 </representation>
 </adaptationset>
 <adaptationset contenttype="audio" segmentalignment="true" bitstreamswitching="true">
 <representation bandwidth="1536000" audiosamplingrate="48000" mimetype="audio/mp4" codecs="mp4a.40.2">
 <audiochannelconfiguration schemeiduri="urn:mpeg:dash:23003:3:audio_channel_configuration:2011" value="16"></audiochannelconfiguration>
 <segmenttemplate media="chunk-stream$RepresentationID$-$Number%05d$.m4s" initialization="init-stream$RepresentationID$.m4s" startnumber="1" timescale="48000">
 <segmenttimeline>
 <s t="0" d="143360"></s>
 <s d="142336" r="2"></s>
 <s d="143360"></s>
 <s d="142336" r="3"></s>
 <s d="143360"></s>
 <s d="142336" r="3"></s>
 <s d="143360"></s>
 <s d="142336" r="3"></s>
 <s d="143360"></s>
 <s d="142336" r="3"></s>
 <s d="143360"></s>
 <s d="142336" r="3"></s>
 <s d="143360"></s>
 <s d="142336" r="1"></s>
 <s d="32768"></s>
 </segmenttimeline>
 </segmenttemplate>
 </representation>
 </adaptationset>
 </period>
</mpd>


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Homepage Design : Best Practices & Examples
5 octobre 2022, par ErinDid you know users spend about 50 milliseconds deciding if they like your website’s homepage design or not ?
With billions of websites and scrolling often done on the go, you have to make a strong first impression because the chances for a once-over are slim.
Learn how to design magnetically-appealing website homepages from this guide.
What is a homepage in web design ?
Homepage is the front page of your website — a destination where users land when typing your website URL address. It’s located at the root of the website’s domain (e.g., matomo.org) or a subdomain (e.g., university.webflow.com).
Design-wise a homepage has two goals :
- Explain the purpose of the website and present overview information
- Provide top-level navigation to lower-level web pages (e.g., blog, sales pages, etc.)
Separately, a homepage is also the place where users will return each time they’ll feel stuck and want to start anew. Thus, your homepage website design should provide obvious navigation paths to other website areas.
6 Must-Know Website Homepage Design Best Practices
Behind every winning homepage design stands a detailed customer journey map.
A customer journey is a schematic representation of how site visitors will move around your website to accomplish various goals.
A good customer journey map lists different actions a user will take after landing on your website (e.g., browse product pages, save items to a wishlist, register an account, etc.) — and it does so for different audience segments.
Source : Nielsen Norman Group Your homepage design should help users move from the first step on their journey (e.g., learning about your website) to the final one (e.g., converting to a paid customer). At the same time, your homepage should serve the needs of both new and returning visitors — prospects who may be at a different stage of their journey (e.g., consideration).
With the above in mind, let’s take a look at several website homepage design ideas and the reasons why they work.
1. Use Familiar Design Elements
Whether you’re designing a new website or refreshing an old one, it’s always tempting to go “out of the box” — use horizontal scrolling, skip header navigation or include arty animations.
Bold design choices work for some brands, mainly those who aren’t using their website as a primary sales channel (e.g., luxury brands).
But unfamiliar design patterns can also intimidate a lot of shoppers. In one observational study, people were asked to guess where specific content (e.g., information on international calls) would be placed on a telecom website. 75% of users picked the same location. This means two things :
- People already have expectations of where specific website information is typically placed
- Yet, one in four users struggles to identify the right areas even within standard website layouts
So why make the job harder for them ? As UX consultant Peter Ramsey rightfully notes :
The truth is : designing the best experience isn’t about being unique, it’s about being easy. And guess what feels really easy to use ? Things that feel familiar.
Therefore, analyse other homepage layout designs in your industry. Pay attention to the number and type of homepage screens and approaches to designing header/footer navigation.
Take some of those ideas as your “base”. Then make your homepage design on-brand with unique typography, icons, visuals and other graphic design elements.
Take a cue from ICAM — a steel manufacturing company. Their niche isn’t typically exciting. Yet, their homepage design stops you in your tracks and tinkers your curiosity to discover more (even if you aren’t shopping for metalware).
The interesting part is that ICAM uses a rather standard homepage layout. You have a hero image in the first screen, followed by a multi-column layout of their industry expertise and an overview of manufacturers.
But this homepage design feels fresh because the company uses plenty of white space, bold typography and vibrant visuals. Also, they delay the creative twist (horizontal scrolling area) to the bottom of the homepage, meaning that it’s less likely to intimidate less confident web users.
2. Decide On The Optimal Homepage Layout
In web design, a homepage layout is your approach to visually organising different information on the screen.
Observant folks will notice that good homepage designs often have the same layout. For example, include a split-view “hero” screen with a call to action on the left and visuals (photo or video) on the left.
SOURCE : shopify.com / SOURCE : squareup.com The reason for using similar layouts for website homepage design isn’t a lack of creativity. On the contrary, some layouts have become the “best practice” because they :
- Offer a great user experience (UX) and don’t confuse first-time visitors
- Feel familiar and create a pleasurable sense of deja-vu among users
- Have proven to drive higher conversion rates through benchmarks and tests
Popular types of website homepage layouts :
- Single column – a classic option of presenting main content in a single, vertical column. Good choice for blogs, personal websites and simple corporate sites.
- Split screen layout divides the page in two equal areas with different information present. Works best for Ecommerce homepages (e.g., to separate different types of garments) or SaaS websites, offering two product types (e.g., a free personal product version and a business edition).
- Asymmetrical layout assumes dividing your homepage into areas of different size and styles. Asymmetry helps create specific focal points for users to draw their attention to the most prominent information.
- Grid of cards layout helps present a lot of information in a more digestible manner by breaking down bigger bulks of text into smaller cards — a graphic element, featuring an image and some texts. By tapping a card, users can then access extra content.
- Boxes are visually similar to cards, but can be of varying shape. For example, you can have a bigger header-width box area, followed by four smaller boxes within it. Both of these website layouts work well for Ecommerce.
- Featured image layout gives visuals (photos and videos) the most prominent placement on the homepage, with texts and other graphic design elements serving a secondary purpose.
- F-pattern layout is based on the standard eye movement most people have when reading content on the website. Eye tracking studies found that we usually pay the most attention to information atop of the page (header area), then scan horizontally before dripping down to the next vertical line until we find content that captures our attention.
User behaviour analytics (UBA) tools are the best way to determine what type of layout will work for your homepage.
For example, you can use Matomo Heatmaps and Session Recording to observe how users navigate your homepage, which areas or links they click and what blockers they face during navigation.
Matomo can capture accurate behavioural insights because we track relative positions to elements within your websites. This approach allows us to provide accurate data for users with different browsers, operating systems, zoom-in levels and fonts.
The best part ? You can collect behavioural data from up to 100 different user segments to understand how different audience cohorts engage with your product.
3. Include a One-Sentence Tagline
A tagline is a one-line summary of what your company does and what its unique sales proposition (USP) is. It should be short, catchy and distinguish you from competitors.
A modern homepage design practice is to include a call to action in the first screen. Why ? Because you then instantly communicate or remind of your value proposition to every user — and provide them with an easy way to convert whenever they are ready to do business with you.
Here’s how three companies with a similar product, a project management app, differentiate themselves through homepage taglines.
Monday.com positions itself as an operating system (OS) for work.
Basecamp emphasises its product simplicity and openly says that they are different from other overly-complex software.
Asana, in turn, addresses a familiar user pain point (siloed communication) that it attempts to fix with its product.
Coming up with the perfect homepage tagline is a big task. You may have plenty of ideas, but little confidence in what version will stick.
The best approach ? Let a series of A/B tests decide. You can test a roaster of homepage slogans on a rotating bi-weekly/monthly schedule and track how copy changes affect conversion rates.
With Matomo A/B test feature, you can create, track and manage all experiments straight from your web analytics app — and get consolidated reports on total page visitors and conversion rates per each tested variation.
Beyond slogans, you can also run A/B tests to validate submission form placements, button texts or the entire page layout.
For instance, you can benchmark how your new homepage design performs compared to the old version with a subset of users before making it publicly available.
4. Highlight The Main Tasks For The User
Though casual browsing is a thing, most of us head to specific websites with a clear agenda — find information, compare prices, obtain services, etc.
Thus, your homepage should provide clear starting points for users’ main tasks (those you’ve also identified as conversion goals on your customer journey maps !).
These tasks can include :
- Account registration
- Product demo request
- Newsletter sign-up
The best website homepage designs organically guide users through a set number of common tasks, one screen at a time.
Let’s analyse Sable homepage design. The company offers a no-fee bank account and a credit card product for soon-to-be US transplants. The main task a user has : Decide if they want to try Sable and hopefully open an account with them.
This mono-purpose page focuses on persuading a prospect that Sable is right for them.
The first screen hosts the main CTA with an animated drop-down arrow to keep scrolling. This is likely aimed at first-time visitors that just landed on the page from an online ad or social media post.
The second screen serves the main pitch — no-fee, no-hassle access to a US banking account that also helps you build your credit score.
The third screen encourages users to learn more about Sable Credit — the flagship product. For the sceptics, the fourth screen offers several more reasons to sign up for the credit product.
Then Sable moves on to pitching its second offering — a no-fee debit card with a cashback. Once again, the follow-up screen sweetens the deal by bringing up other perks (higher cashback for popular services like Amazon) and overcoming objections (no SSN required and multi-language support available).
The sequence ends with side-by-side product comparison and some extra social proof.
In Sable’s case, each homepage screen has a clear purpose and is designed to facilitate one specific user action — account opening.
For multi-product companies, the above strategy works great for designing individual landing pages.
5. Design Proper Navigation Paths
All websites have two areas reserved for navigation :
- Header menu
- Footer menu
Designing an effective header menu is more important since it’s the primary tool visitors will use to discover other pages.
Your header menu can be :
- Sticky — always visible as the person keeps scrolling.
- Static — e.g., a hidden drop-down menu.
If you go for a static header and have a longer homepage layout (e.g., 5+ screens), you also need to add extra navigation elements somewhere mid-page. Or else users might not figure out where to go next and merely bounce off.
You can do this by :
- Promoting other areas of your website (e.g., sub-category pages) by linking out to them
- Adding a carousel of “recent posts”, “recommended reads” and “latest products”
- Using buttons and CTAs to direct users towards specific actions (e.g., account registration) or assets (free eBook)
For instance, cosmetics brand Typology doesn’t have a sticky header on the homepage. Instead, they prompt discovery by promoting different product categories (best sellers, bundles, latest arrivals) and their free skin diagnostic quiz — a great engagement mechanism to retain first time users.
Once the user scrolls down to the bottom of the page, they should have an extra set of navigational options — aka footer links.
Again, these help steer the visitor towards discovering more content without scrolling back up to the top of your homepage.
Nielsen Norman Group says that people mostly use footers as :
- A second chance to be convinced — after reading the entire homepage, the user is ready to give your product a go.
- The last resort for hard-to-find content that’s not displayed in global header navigation (e.g., Terms and Conditions or shipping information pages).
As a rule of thumb, you should designate the following information to the footer :
- Utility links (Contact page, Terms & Conditions, Privacy Policy, etc.)
- Secondary-task links (e.g., Career page, Investor Details, Media contacts, etc.)
- Brands within the organisation (if you operate several)
- Customer engagement link (email newsletters and social media buttons)
The key is to keep the area compact — not more than one standard user screen resolution of 1280×720.
6. Show Users What’s Clickable (Or Not)
A homepage invites your site visitors on a journey. But if they don’t know which elements to click, they aren’t going to get anywhere.
Good homepage design makes it obvious which page elements are clickable, i.e., can take the user to a new page or another segment of the homepage.
Here are several must-know homepage design tips for better on-page navigation :
- Use colour and underline or bold to highlight clickable words. Alternatively, you can change the browser cursor from a standard arrow into another element (e.g., a larger dot or a pointy finger) to indicate when the cursor hovers over a clickable website area.
- Make descriptive button texts that imply what will happen when a user clicks the page. Instead of using abstract and generic button texts like “see more” or “learn more”, try a more vibrant language like “dive in” for clicking through to a spa page.
- Use a unified hover area to show how different homepage design elements represent a single path or multiple navigation paths. When multiple items are encapsulated in one visual element (e.g., a box), users may be reluctant to click the image because they aren’t sure if it’s one large hit area leading to a single page or if there are multiple hit areas, leading to different pages.
Homepage of BEAUSiTE — a whimsical hotel in the Swiss Alps – embodies all of the above design principles. They change the cursor style whenever you scroll into a hit area, use emotive and creative micro-copy for all button texts and clearly distinguish between different homepage elements.
How to Make Your Homepage Design Even More Impactful ?
Website homepage design is roughly 20% of pure design work and 80% of behind-the-scenes research.
To design a high-performing homepage you need to have data-backed answers to the following questions :
- Who are your primary and secondary target audiences ?
- Which tasks (1 to 4) you’d want to help them solve through your homepage ?
You can get the answers to both questions from your web analytics data by using audience segmentation and page transition (behaviour flow) reports in Matomo.
Based on these, you can determine common user journeys and tasks people look to accomplish when visiting your website. Next, you can collect even more data with UBA tools like heatmaps and user session recordings. Then translated the observed patterns into working homepage design ideas.
Improve your homepage design and conversion rates with Matomo. Start your free 21-day trial now !
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