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  • Publier sur MédiaSpip

    13 juin 2013

    Puis-je poster des contenus à partir d’une tablette Ipad ?
    Oui, si votre Médiaspip installé est à la version 0.2 ou supérieure. Contacter au besoin l’administrateur de votre MédiaSpip pour le savoir

  • Encoding and processing into web-friendly formats

    13 avril 2011, par

    MediaSPIP automatically converts uploaded files to internet-compatible formats.
    Video files are encoded in MP4, Ogv and WebM (supported by HTML5) and MP4 (supported by Flash).
    Audio files are encoded in MP3 and Ogg (supported by HTML5) and MP3 (supported by Flash).
    Where possible, text is analyzed in order to retrieve the data needed for search engine detection, and then exported as a series of image files.
    All uploaded files are stored online in their original format, so you can (...)

  • Qu’est ce qu’un masque de formulaire

    13 juin 2013, par

    Un masque de formulaire consiste en la personnalisation du formulaire de mise en ligne des médias, rubriques, actualités, éditoriaux et liens vers des sites.
    Chaque formulaire de publication d’objet peut donc être personnalisé.
    Pour accéder à la personnalisation des champs de formulaires, il est nécessaire d’aller dans l’administration de votre MediaSPIP puis de sélectionner "Configuration des masques de formulaires".
    Sélectionnez ensuite le formulaire à modifier en cliquant sur sont type d’objet. (...)

Sur d’autres sites (7075)

  • ffmpeg transcoding move to mp4

    16 août 2022, par Paul

    I currently use windows free software called : AnyVideoConverter to convert my iPhone huge MOV files to MP4s that can be played on other devices via my plex server.
I want to automate that process so it runs in the background on one of my linux machines.
However I am struggling to get it working. Here is what I have so far.

    


    Original file details :
Duration : 00:00:13.53
Original Video : 40MB
Video details : Stream #0:0(und) : Video : hevc (Main) (hvc1 / 0x31637668), yuv420p(tv, bt709), 3840x2160, 23453 kb/s, 30 fps, 30 tbr, 600 tbn, 600 tbc (default)

    


    AnyVideoConverted file :
File Size : 5MB
Video Details : Stream #0:0(und) : Video : h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 3840x2160, 2870 kb/s, 24 fps, 24 tbr, 12288 tbn, 48 tbc (default)

    


    This format works great on all my devices

    


    So far the closes I managed to get to that is this ffmpeg command :

    


    ffmpeg -i original.mov -c:v libx264 -profile:v baseline -maxrate 3M -bufsize 3M -c:a aac -b:a 128k x264.mp4


File size:5MB
Video details :     Stream #0:0(und) : Video : h264 (Constrained Baseline) (avc1 / 0x31637661), yuv420p, 2160x3840, 3063 kb/s, 30 fps, 30 tbr, 15360 tbn, 60 tbc (default)

    


    problem is that when I try to play it via plex I get :

    


    Playback Error : This server is not powerful enough to convert video

    


    What am I doing wrong here ?

    


    My knowledge of ffmpeg or video encoding/transcoding is zero. Can someone advise me how to get my mov files converted to mp4 so they can be played via plex without additional transcoding by plex and without reducing the resolution size of the converted video.

    


    Any pointers ?
Thanks

    


  • My (FFMPEG issue ) RTMP server(freebsd) wont let me hear video when I play a huge file over the server itself :/

    19 avril 2021, par Engi Gang

    Hey my name is Alisha from Norway im trying to get my RTMP server working the thing is that it works just fine but I just cant stream over it with ffmpeg I can stream to it on OBS and it works fine, but I am trying to a website where people could watch old public domain movies from the 1950 some of the films are actually pretty big lol.... anyways I detailed bellow more

    


    rm -rf /mnt/hls/loool && ffmpeg -re -i "$file" -c:v libx264 -c:a aac -b:v 300k -b:a 95k -f flv -flvflags no_duration_filesize rtmp ://lambright.xyz:1935/live/loool

    


    any work around I literally cant play the audio :( I can only hear (my source file is an MKV and 3gb )

    


    Note I had a smaller mp4 file and it did played the audio, the video isnt even playable in chrome but on VLC it is, but only a small file worked fine... its fine when I stream from my pc, but whats the point I am trying to set up my vintage 1950 serverbox :') trying to build a nice website where users could watch neat and decent old movies that are public domain if you wonder :/

    


    Another note when I am trying to play it on my iphone safari browser it does actually play parts but audio is super corrupted like you hear the audio sometimes :((

    


    rtmp {
    server {
        listen 1935; # Listen on standard RTMP port
        chunk_size 4000;

        application live {
            allow play all;
            live on;
            record off;
            hls on;
            hls_nested on;
            hls_path /mnt/hls/;
            hls_fragment 2s;
        }
        
    }
}


    


  • Accessibility Testing : Why It Matters and How to Get Started

    7 mai 2024, par Erin

    Nearly 96% of website homepages had failures with meeting web accessibility criteria in 2024. Aside from not complying with web accessibility laws and regulations, companies are failing a growing number of users with accessibility needs.

    With disabilities, chronic illnesses and ageing populations all rising, brands need to take accessibility more seriously. 

    In this article, we explain why accessibility testing is so important and how you can get started today.

    What is accessibility testing ?

    Accessibility testing optimises digital experiences to make them accessible for users with a range of disabilities and impairments. This includes users with vision impairments, hearing loss, neurodivergence, motor disabilities and cognitive conditions.

    The goal is to create inclusive experiences for everyone by implementing UX principles that address the usability needs of diverse audiences.

    To help developers create accessible experiences, the World Wide Web Consortium (W3C) created the Web Content Accessibility Guidelines (WCAG). The international WCAG standards define the Four Principles of Accessibility :

    • Perceivable : Information and user interface components must be presentable to users in ways they perceive.
    • Operable : User interface components and navigation must be operable.
    • Understandable : Information and the operation of user interfaces must be understandable.
    • Robust : Content must be robust enough to be interpreted reliably by various user agents, including assistive technologies.
    WCAG Four Principles of Accessibility

    The current version of WCAG (2.2) contains 86 success criteria with three grades representing conformance levels :

    • Level A is the minimum conformance rating, indicating that web content is accessible to most users.
    • Level AA is the recommended conformance level to make content accessible to almost everyone, including users with severe disabilities.
    • Level AAA is the highest conformance rating, making content accessible to everyone, regardless of disability.
    WCAG accessibility conformance levels

    Why is accessibility testing important ?

    With record numbers of lawsuits over online accessibility cases, it’s clear that companies underestimate the importance of accessibility testing. Here are seven key reasons you should pay more attention to it :

    1. Create inclusive experiences : Above all, accessibility testing creates inclusive experiences for all users.
    2. Adhere to accessibility regulations : Accessibility laws in most major markets — including the EU web accessibility policy — make it illegal for companies to discriminate against users with disabilities.
    3. Social responsibility : Companies have an ethical responsibility to cater to all users and consumers. 57% say they’re more loyal to brands that commit to addressing social inequities.
    4. Accessibility needs are growing : 16% of the world’s population (1 in 6) experience significant disability and the number will continue to grow as ageing populations rise.
    5. Improve experiences for everyone : Accessibility improves experiences for all users — for example, 80% of UK viewers aged 18-25 (2021) watch content with subtitles enabled.
    6. Maximise marketing reach : Platforms like Google prioritise accessibility yearly, making accessible content and experiences more visible.
    7. Accessibility is profitable : Inclusive companies earn 1.6x more revenue, 2.6x more net income and 2x more profit, according to Accenture (PDF).
    Accenture Accessibility is Profitable

    Who needs inclusive UX ?

    Accessibility testing starts with understanding the usability needs of audiences with disabilities and impairments. Here’s a quick summary of the most common impairments and some of the needs they have in common :

    • Visual impairments : Users may rely on screen readers, magnification software, braille displays, etc. or require certain levels of contrast, text sizes and colour combinations to aid visibility.
    • Hearing impairments : Users may rely on closed captions and subtitles for video content, transcripts for multimedia content and visual alerts/notifications for updates.
    • Motor or mobility impairments : Users might rely on adaptive keyboards, voice recognition and other assistive devices.
    • Cognitive and neurological impairments : Users may rely on technologies like text-to-speech software or require simplified user interfaces, contrast designs, etc., to aid comprehension.
    • Speech impairments : Users may rely on speech recognition and dictation software for any interaction that requires them to speak (e.g., automated customer service machines).

    While accessibility tools can alleviate certain accessibility challenges, inclusive design can remove much of the burden from users. This can involve using plenty of contrast, careful font selection, increasing whitespace and plenty of other design choices.

    Refer to the latest version of the WCAG for further guidance.

    How to run accessibility testing

    Now that we’ve emphasised the importance of accessibility, let’s explain how you can implement your own accessibility testing strategy.

    Create your accessibility testing plan

    Careful planning is crucial for making accessibility testing affordable and profitable. This starts with identifying the assets you need to test and optimise. This may include :

    • Website or web app
    • Mobile app
    • Videos
    • Podcasts and audio
    • PDFs
    • Marketing emails

    Map out all the assets your target audience interacts with and bring them into your accessibility testing plan. Optimising your website for screen readers is great, but you don’t want to forget your marketing emails and exclude vision-impaired users.

    Once you’ve got a complete list of assets, identify the elements and interactions with each one that require accessibility testing. For example, on your website, you should optimise navigation, user interfaces, layouts, web forms, etc.

    You also need to consider the impact of device types. For example, how touchscreens change the experience for motor impairments.

    Now that you know the scope of your testing strategy, it’s time to define your accessibility standards. Use external frameworks like WCAG guidelines and relevant legal requirements to create an internal set of standards.

    Once your accessibility standards are complete, train your staff at every level. This includes designers, developers, and content creators — everyone who works on assets is included in your accessibility testing strategy.

    Implement your accessibility standards throughout the design and development phases. Aim to create the most inclusive experiences possible before the accessibility testing stage.

    Implement accessibility practices at every level

    Treating accessibility as an afterthought is the biggest mistake you can make. Aside from neglecting the importance of accessibility, it’s simply not affordable to create assets and then optimise them for accessibility.

    Instead, you need to implement accessibility standards in every design and development stage. This way, you create inclusive assets from the beginning, and accessibility testing flags minor fixes rather than overhauls.

    By extension, you can take lessons from accessibility tests and update your accessibility standards to improve the quality of future assets.

    Set clear specifications in your accessibility standards for everyone to follow. For example, content publishers should be responsible for adding alt-text to all images. Make designers responsible for following contrast guidelines when optimising elements like CTA buttons.

    A comparison of CTA buttons

    Next, managers can review assets and check for accessibility standards before anything is signed off. This way, you achieve higher test accessibility scores, and most fixes should be minor.

    This is the key to making accessibility testing manageable and profitable.

    Automate accessibility testing

    Automation is the other big factor in making accessibility efficient. With the right tools, you can run tests periodically without any manual workload, collecting data and flagging potential issues at almost no cost.

    For example, you can run automated accessibility tests on your website every month to check for common issues. This might flag up pages without alt-text for images, colour issues on a new batch of landing pages or a sudden drop in mobile loading times.

    Every automated test you can run reduces the manual workload of optimising accessibility. This frees up more time for the manual tests that require the attention of accessibility experts. 

    • Free up time for accessibility tasks that require manual testing
    • Identify issues with new content, assets, code, etc. faster
    • Run automated accessibility testing on new CRO changes

    Schedule manual accessibility reviews

    While it’s important to automate as much accessibility testing as possible, most accessibility standards require some form of manual testing. If we use the WCAG standards as a guideline, more than 70% of success require manual review and verification, including :

    • Testing websites with a screen reader
    • Navigating apps by only using a keyword
    • Quality assessing closed captions and subtitles
    • Testing web forms for people using speech input
    • Checking conversion actions for users with mobility issues (CTAs, forms, payments, etc.)

    Yes, you can automatically check all images for alt-text, but simply providing alt-text isn’t enough. You also have to review alt-text to make sure they’re descriptive, accurate and informative about the experience.

    Once again, the best way to minimise your time spent on manual testing is to implement accessibility standards throughout design and development. Train your content publishers to create alt-text that meets your criteria and editors to review them before pieces are signed off. 

    This way, you should always have the required alt-text before the content reaches the accessibility testing stage. The same applies to video transcriptions, web forms, website navigation, etc.

    Building a culture of accessibility makes the testing process as efficient as possible.

    What tools do you need for accessibility testing ?

    Now that we’ve covered the key essentials of accessibility testing, let’s look at some of the best accessibility testing tools to help you implement your strategy.

    accessiBe : AI-powered accessibility testing automation

    accessiBe is an accessibility testing automation and management system. It incorporates two core products : accessWidget for automating UI accessibility and accessFlow as an all-in-one solution for developers.

    screenshot of accessiBe

    Key features :

    • Automated accessibility testing
    • Accessibility widget for easy optimisation
    • Product accessibility for web, mobile and native apps
    • AI-powered accessibility insights
    • Compliance with WCAG, EAA and more

    As explained earlier, automation is crucial for making accessibility testing efficient and profitable. With accessiBe, you can automate the first line of accessibility checks so testers only need to get involved when manual action is necessary.

    Maze : Intelligent usability testing software

    Maze is a usability testing system that uses AI and automation to enhance traditional qualitative testing. You can run automated tests on live websites, capture survey feedback and recruit users to test experiences with real people.

    screenshot of Maze

    Key features :

    • Live website testing
    • Feedback surveys
    • Usability interviews
    • Test recruitment
    • Automated analysis

    While traditional usability interviews can provide in-depth insights, they’re expensive, time-consuming and difficult to run at scale. Maze’s solution is a hybrid testing system that automates data capture and analysis while supporting real user testing in one system.

    Matomo : Empowering people with ethical web analytics

    Matomo is a web analytics solution that gives you 100% data ownership while respecting user privacy. Think of this as a Google Analytics alternative that doesn’t use your visitors’ data for advertising purposes.

    Matomo dashboard

    Key features :

    • Privacy-friendly and GDPR-compliant tracking
    • Conversion rate optimisation features like heatmaps, session recordings, A/B testing and more
    • Accurate, unsampled data – see 40-60% more data than other analytics tools that sample data
    • Open-source

    Accessibility starts with creating quality experiences for everyone. Matomo reliably captures 100% of the data you need to optimise experiences without losing their trust. Instead of handing their personal info to Google or other tech giants, you retain full data ownership — fully compliant with GDPR, CCPA, etc.

    Try Matomo free for 21-days (no credit card required), or speak to our sales team for more info on how Matomo can enhance your site’s user experience and support your accessibility testing strategy.

    Try Matomo for Free

    Get the web insights you need, without compromising data accuracy.

    No credit card required

    UserTesting : Video-based user testing software

    UserTesting is the more traditional system for running usability tests with real people. The platform helps you recruit users and manage usability tests with a series of sessions and video interviews.

    screenshot of UserTesting

    Key features :

    • Usability testing
    • Test recruitment
    • Live interviews
    • AI-powered insights
    • Usability services

    UserTesting is a slower, more expensive approach to testing experiences, but its video-based interviews allow you to have meaningful conversations with real users.

    Siteimprove : WCAG compliance testing

    Siteimprove automates website testing, accessibility and optimisation. It includes dedicated tools for checking WCAG and DCI compliance with an automated scoring system. This helps you keep track of scores and identify any accessibility and usability issues faster.

    screenshot of Siteimprove screenshot of Siteimprove

    Key features :

    • Automated accessibility checks
    • Inclusivity scores
    • Accessibility recommendations
    • Accessibility tracking
    • Marketing and revenue attribution
    • Usability insights

    Siteimprove provides a first line of accessibility testing with automated checks and practical recommendations. It also tracks accessibility scores, including ratings for all three WCAG compliance levels (A, AA and AAA).

    Find the value in accessibility testing

    Accessibility testing isn’t only a moral obligation ; it’s good business. Aside from avoiding fines and lawsuits, inclusive experiences are increasingly profitable. User bases with accessibility needs are only growing while non-disabled audiences are using accessibility resources like subtitles and transcripts in greater numbers.

    Accessibility improves everyone’s experiences, and this only does good things for conversion rates, revenue and profit.

    Start building your datasets for accessibility testing today with a Matomo 21-day free trial — no credit card required. Gain 100% ownership over your analytics data while complying with GDPR and other data privacy regulations.