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• ffmpeg command to add moving text watermark to video [closed]

  13 octobre 2023, par Imran Khan
  


  


          // Constants for watermark movement, direction change intervals, fade intervals, and overlap duration
        const MOVE_SPEED = 3;
        const DIRECTION_CHANGE_MIN = 3000;
        const DIRECTION_CHANGE_MAX = 6000;
        const FADE_INTERVAL_MIN = 10000;
        const FADE_INTERVAL_MAX = 20000;
        const OVERLAP_DURATION = 2000;

        // Get references to the video container and watermarks
        const container = document.querySelector('.video-container');
        const watermark1 = document.getElementById('watermark1');
        const watermark2 = document.getElementById('watermark2');

        // Helper function to get a random integer between min and max (inclusive)
        function getRandomInt(min, max) {
            return Math.floor(Math.random() * (max - min + 1)) + min;
        }

        // Helper function to get a random direction (either 1 or -1)
        function getRandomDirection() {
            return Math.random() > 0.5 ? 1 : -1;
        }

        // Set the initial position of the watermark inside the video container
        function setInitialPosition(watermark) {
            const x = getRandomInt(0, container.offsetWidth - watermark.offsetWidth);
            const y = getRandomInt(0, container.offsetHeight - watermark.offsetHeight);
            watermark.style.left = `${x}px`;
            watermark.style.top = `${y}px`;
            watermark.style.opacity = 1;
        }

        // Function to handle continuous movement of the watermark
        function continuousMove(watermark) {
            let dx = getRandomDirection() * MOVE_SPEED;
            let dy = getRandomDirection() * MOVE_SPEED;

            // Inner function to handle the actual movement logic
            function move() {
                let x = parseInt(watermark.style.left || 0) + dx;
                let y = parseInt(watermark.style.top || 0) + dy;

                // Check boundaries and reverse direction if necessary
                if (x < 0 || x > container.offsetWidth - watermark.offsetWidth) {
                    dx = -dx;
                }
                if (y < 0 || y > container.offsetHeight - watermark.offsetHeight) {
                    dy = -dy;
                }

                // Apply the new position
                watermark.style.left = `${x}px`;
                watermark.style.top = `${y}px`;

                // Continue moving
                setTimeout(move, 100);
            }

            move();

            // Change direction at random intervals
            setInterval(() => {
                const randomChoice = Math.random();
                if (randomChoice < 0.33) {
                    dx = getRandomDirection() * MOVE_SPEED;
                    dy = 0;
                } else if (randomChoice < 0.66) {
                    dy = getRandomDirection() * MOVE_SPEED;
                    dx = 0;
                } else {
                    dx = getRandomDirection() * MOVE_SPEED;
                    dy = getRandomDirection() * MOVE_SPEED;
                }
            }, getRandomInt(DIRECTION_CHANGE_MIN, DIRECTION_CHANGE_MAX));
        }

        // Handle the fading out of the old watermark and fading in of the new watermark
        function fadeOutAndIn(oldWatermark, newWatermark) {
            setTimeout(() => {
                setInitialPosition(newWatermark);
                newWatermark.style.opacity = 1;
            }, 0);

            setTimeout(() => {
                oldWatermark.style.opacity = 0;
            }, OVERLAP_DURATION);

            // Continue the cycle
            setTimeout(() => fadeOutAndIn(newWatermark, oldWatermark), getRandomInt(FADE_INTERVAL_MIN, FADE_INTERVAL_MAX));
        }

        // Initialize the watermarks
        setInitialPosition(watermark1);
        continuousMove(watermark1);
        setTimeout(() => fadeOutAndIn(watermark1, watermark2), getRandomInt(FADE_INTERVAL_MIN, FADE_INTERVAL_MAX));
        continuousMove(watermark2);
    

  


  body, html {
            height: 100%;
            margin: 0;
            font-family: Arial, sans-serif;
            display: flex;
            justify-content: center;
            align-items: center;
            background-color: #eee;
        }

        .video-container {
            width: 50vw;
            height: 50vh;
            background-color: black;
            position: relative;
            overflow: hidden;
        }

        .watermark {
            font-size: 22px;
            position: absolute;
            color: white;
            opacity: 0;
            transition: opacity 2s;
        }

  


  &#xA;&#xA;&#xA;    &#xA;    &#xA;    &#xA;&#xA;&#xA;    <div class="video-container">&#xA;        <span class="watermark">watermark</span>&#xA;        <span class="watermark">watermark</span>&#xA;    </div>&#xA;    &#xA;&#xA;

  


  


  



  I am trying to achieve an animation effect using ffmpeg. I am adding text watermark to an input video and animate the text diagonally, horizontally or vertically changed randomly. Here is what I have achieved so far.

  


  ffmpeg -i video.mp4 -c:v libx264 -preset veryfast -crf 25 -tune zerolatency -vendor ap10 -pix_fmt yuv420p -filter:v "drawtext=fontfile=./fonts/Roboto/Roboto-Light.ttf:text='Watermark':fontcolor=white:alpha=0.5:fontsize=60:y=h/10*mod(t\,10):x=w/10*mod(t\,10):enable=1" -c:a copy watermark.mp4

  


  Here is what I want it to work.

  


  Initial Position :
The watermark randomly placed in the video the first time they appear.

  


  Continuous Movement :
The watermark continuously moves within the video.
The direction and speed of the watermark's movement are random. It can move diagonally, purely horizontally, or purely vertically.
When the watermark reaches the boundaries of the video, it bounces back, changing its direction.

  


  Direction Change :
During its continuous movement, the watermark will suddenly change its direction at random intervals between 3 to 6 seconds.
When changing direction, the watermark can randomly determined move diagonally, purely horizontally, or purely vertically.

  


  Fade In and Out :
Every 10 to 20 seconds (randomly determined), the current watermark begins to fade out.
As the old watermark starts to fade out, a new watermark fades in at a random position, ensuring that there's always a visible watermark on the screen.
These two watermarks (the fading old one and the emerging new one) overlap on the screen for a duration of 2 seconds, after which the old watermark completely disappears.
These patterns and characteristics together provide a dynamic, constantly moving, and changing watermark for the video

  


  To achieve the result I think we can use the drawtext multiple times. I have attached the HTML and JavaScript variant just for the reference to understand the result but I am trying to do this using ffmpeg.

  


• Evolution #2469 : Mode « vacances » : suspension temporaire de toute publication

  28 juillet 2017

  j’ai fait un plugin vacances minimal qui permet d’activer un mode vacances en backoffice.
  https://contrib.spip.net/ecrire/?exec=article&id_article=4921

  il ne fait qu’enregistrer un état donné ensuite aux squelettes et aux plugins de récupérer l’information

• Revision afd2f68dae : Revert "VP9_COPY_CONVOLVE_SSE2 optimization" This reverts commit a5e97d874b16ae

  5 août 2015, par James Zern

  Changed Paths :
   Modify /vpx_dsp/x86/vpx_convolve_copy_sse2.asm

  
  
  Revert "VP9_COPY_CONVOLVE_SSE2 optimization"

  This reverts commit a5e97d874b16ae5826b68515f1e35ffb44361cf8.

  Additionally :
  Revert "vpx_convolve_copy_sse2 : fix win64"

  This reverts commit 22a8474fe7ec30d96f746dc6e4b23771758c071e.

  This change performs poorly on various x86_64 devices affecting
  performance by 1-3% at 1080P. Performance on chromebook like devices was
  mixed neutral to slightly negative, so there should be minimal change
  there.

  Change-Id : I95831233b4b84ee96369baa192a2d4cc7639658c