I have a HTML5 video banner at the top of my page. It has the autoplay and loop attributes added. When I begin to scroll down the page the video stops and never restarts when I scroll back upwards. I'd like the video to carry on playing no matter if the user scrolls or not.
There doesn't seem to be any attributes listed in the W3C spec that suggests a solution, so is there another way of disabling this functionality?
The HTML and CSS is very simple so I'm wondering if I need some JS to help along the way:
HTML:
<video preload="none" autoplay loop>
<source src="/media/test.mp4" type="video/mp4">
</video>
CSS:
video {
width: 100%;
height: auto;
}
Any help would be much appreciated.
You can use isInViewport jQuery plugin as below:
$('video').each(function(){
if ($(this).is(":in-viewport")) {
$(this)[0].play();
} else {
$(this)[0].pause();
}
})
it works fine for me,, if you want to change yiur viewport then change fraction = 0.5; in my code
var videos = document.getElementsByTagName("video"),
fraction = 0.5;
function checkScroll() {
for(var i = 0; i < videos.length; i++) {
var video = videos[i];
var x = video.offsetLeft, y = video.offsetTop, w = video.offsetWidth, h = video.offsetHeight, r = x + w, //right
b = y + h, //bottom
visibleX, visibleY, visible;
visibleX = Math.max(0, Math.min(w, window.pageXOffset + window.innerWidth - x, r - window.pageXOffset));
visibleY = Math.max(0, Math.min(h, window.pageYOffset + window.innerHeight - y, b - window.pageYOffset));
visible = visibleX * visibleY / (w * h);
if (visible > fraction) {
video.play();
} else {
video.pause();
}
}
}
window.addEventListener('scroll', checkScroll, false);
window.addEventListener('resize', checkScroll, false);
div {padding-top:300px; width:320px;}
video {
padding-bottom:300px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div>
<video id="video1" preload="auto" loop="loop">
<source src="http://www.w3schools.com/html/movie.mp4" type="video/mp4">>
bgvideo
</video>
</div>
This can be disabled by using the attribute data-keepplaying.
<video preload="none" autoplay loop>
<source src="/media/test.mp4" type="video/mp4">
</video>
if using fullpage.js
<video autoplay muted loop data-keepplaying>
<source src="myvide.mp4" type="video/mp4">
</video>
works
Related
I know how to copy on frame by frame basis from a playing HTML5 video to a canvas using 2D context.
But I want to work with a paused video, change dinamically its currentTime and copy current frame of video to canvas.
My guess is some process is not called yet when video position is set with currentTime property, although the video itself does update the image it shows (but not to the canvas).
I've found that it's posible to overcome this by setting a setTimeout to do the canvas ´drawImage´ in the next step.
You can see here a jsfiddle that proves the point.
As you can see in the fiddle you can play the video, and canvas updates, but if you pause the video, mouse scroll moves currentTime of video. There, a ´seTimeout´ is needed to update the canvas, if I call the drawImage method directly, canvas doesn't update.
In short, my question is:
Is there a better way to do this? Is it posible to do this without setTimeout and inside de loop itself? Pros & Cons?
Thank you very much for reading through here!
Every time you change the currentTime of your VideoElement, a seeked Event will trigger when the video actually changed its position.
var vid = document.getElementById("v");
var canvas = document.getElementById("c");
var context = canvas.getContext('2d');
var targetFrame = document.getElementById('t');
var cw = canvas.width = 200;
var ch = canvas.height = Math.round(cw / 1.7777);
var targetOffset = 0;
window.addEventListener('wheel', function(e) {
e.preventDefault();
targetOffset = targetOffset + (e.deltaY / 1000);
targetFrame.value = targetOffset;
seek(); // for demo purpose, we only listen to wheel
return false;
});
// that's all is needed
vid.addEventListener('seeked', function() {
context.drawImage(vid, 0, 0, cw, ch);
});
// for demo
// removed the rendering loop
// now it only changes the video's currentTime property
function seek() {
targetOffset = targetOffset * 0.9;
targetFrame.value = Math.round(targetOffset * 100) / 100;
var vct = vid.currentTime - targetOffset;
if (vct < 0) {
vct = vid.duration + vct;
} else if (vct > vid.duration) {
vct = vct - vid.duration;
}
vid.currentTime = vct;
}
.column {
float: left;
width: 50%;
}
.row:after {
content: "";
display: table;
clear: both;
}
#c {
border: 1px solid black;
}
<h3>
scroll up is forward
</h3>
<div class="row">
<div class="column">
<div>
Video element:
</div>
<video controls height="120" id="v" tabindex="-1" autobuffer="auto" preload="auto">
<source type="video/webm" src="https://www.html5rocks.com/tutorials/video/basics/Chrome_ImF.webm"/>
</video>
</div>
<div class="column">
<div>
Canvas element:
</div>
<canvas id="c"></canvas>
<div>
Momentum: <input type=text id="t">
</div>
</div>
</div>
I wrote a simple script that take a frame from a video and draw it to a canvas. My problem is that the colors are changing between the video and the drawn image.
I put here the result next to the original to make it easier to see. The original one is on the left. It's seems to be way more visible on chrome browser btw. All the test I made where on OSX.
Here a snippet, canvas on left, video on right:
// Get our mask image
var canvas = document.querySelector(".canvas");
var video = document.querySelector(".video");
var ctx = canvas.getContext('2d');
function drawMaskedVideo() {
ctx.drawImage(video, 0, 0, video.videoWidth/2, video.videoHeight, 0,0, video.videoWidth/2, video.videoHeight);
}
requestAnimationFrame(function loop() {
drawMaskedVideo();
requestAnimationFrame(loop.bind(this));
});
html, body {
margin: 0 auto;
}
.video, .canvas {
width: 100%;
}
.canvas {
position: absolute;
top: 0;
left: 0;
}
<video class="video" autoplay="autoplay" muted="muted" preload="auto" loop="loop">
<source src="http://mazwai.com/system/posts/videos/000/000/214/original/finn-karstens_winter-wonderland-kiel.mp4" type="video/mp4">
</video>
<canvas class='canvas' width='1280' height='720'></canvas>
I'd like to know why this thing happen, and if it possible to get rid of it in a cross browser way ?
Here the simple script I wrote:
let video = document.querySelector('#my-video') // .mp4 file used
let w = video.videoWidth;
let h = video.videoHeight;
let canvas = document.createElement('canvas');
canvas.width = w;
canvas.height = h;
let ctx = canvas.getContext('2d');
ctx.drawImage(video, 0, 0, w, h)
document.querySelector('.canvas-container').appendChild(canvas);
The solution might be as simple as setting a css filter to the video element:
.video {
-webkit-filter: contrast(100%);
}
I can't reason about this since it was discovered accident (playing with your demo and reading related answers), so I leave the technical explanation for someone else and leave you with some magic for now.
Any sufficiently advanced technology is indistinguishable from magic.
— Arthur C. Clarke
// Get our mask image
var canvas = document.querySelector(".canvas");
var video = document.querySelector(".video");
var ctx = canvas.getContext('2d');
function drawMaskedVideo() {
ctx.drawImage(video, 0, 0, video.videoWidth/2, video.videoHeight, 0,0, video.videoWidth/2, video.videoHeight);
}
requestAnimationFrame(function loop() {
drawMaskedVideo();
requestAnimationFrame(loop.bind(this));
});
html, body {
margin: 0 auto;
}
.video, .canvas {
width: 100%;
}
.video {
-webkit-filter: contrast(100%);
}
.canvas {
position: absolute;
top: 0;
left: 0;
}
<video class="video" autoplay="autoplay" muted="muted" preload="auto" loop="loop">
<source src="http://mazwai.com/system/posts/videos/000/000/214/original/finn-karstens_winter-wonderland-kiel.mp4" type="video/mp4">
</video>
<canvas class='canvas' width='1280' height='720'></canvas>
Note:
Running this on a Macbook Pro (2,3 GHz Intel Core i5) I could see no difference performance wise. Tracked CPU during the video playback and both demos idle at around 28%.
I am trying to change my video source if my screen width is under 1000px.
Any help would be much appreciated as with my little knowledge with javascript and Jquery i am not sure what to do from here.
Thanks.
My current code below:
HTML
<video id="bg-vid" autoplay defaltmuted playsinline>
<source id="v1" src="img/optimised/desktop-palmtrees.mp4" type="video/mp4">
<source src="img/Palm_Trees.webm" type="video/webm" onerror="fallback(parentNode)">
</video>
Jquery
$(document).ready(function($){
'use strict';
if ($(window).width() < 1000) {
var videoFile = 'img/optimised/desktop-palmtrees.mp4';
var source = document.getelementbyid('v1');
source.src = videoFile;
}
else if ($(window).width() > 1000) {
var videoFile = 'img/optimised/iphone-palmtrees.mp4';
var source = document.getelementbyid('v1');
source.src = videoFile;
}
});
Here you go, I added some console.log() for you to trace the src attribute.
$(function(){
console.log('before: '+$('#v1').attr('src'));
if ($(window).width() < 1000) {
var videoFile = 'img/optimised/desktop-palmtrees.mp4';
$('#v1').attr('src',videoFile);
}
else if ($(window).width() > 1000) {
var videoFile = 'img/optimised/iphone-palmtrees.mp4';
$('#v1').attr('src',videoFile);
}
console.log('after: '+$('#v1').attr('src'));
});
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<video id="bg-vid" autoplay defaltmuted playsinline>
<source id="v1" src="test.mp4" type="video/mp4">
<source src="img/Palm_Trees.webm" type="video/webm" >
</video>
I have the following code:
<!DOCTYPE html>
<title>Video/Canvas Gray Effect</title>
<script>
document.addEventListener('DOMContentLoaded', function(){
var v = document.getElementById('v');
var canvas = document.getElementById('c');
var context = canvas.getContext('2d');
var back = document.createElement('canvas');
var backcontext = back.getContext('2d');
var cw,ch;
v.addEventListener('play', function(){
cw = v.clientWidth;
ch = v.clientHeight;
canvas.width = cw;
canvas.height = ch;
back.width = cw;
back.height = ch;
draw(v,context,backcontext,cw,ch);
},false);
},false);
function draw(v,c,bc,w,h) {
if(v.paused || v.ended) return false;
// First, draw it into the backing canvas
bc.drawImage(v,0,0,w,h);
// Grab the pixel data from the backing canvas
var idata = bc.getImageData(0,0,w,h);
var data = idata.data;
// Loop through the pixels, turning them grayscale
for(var i = 0; i < data.length; i+=4) {
var r = data[i];
var g = data[i+1];
var b = data[i+2];
var brightness = (3*r+4*g+b)>>>3;
data[i] = brightness;
data[i+1] = brightness;
data[i+2] = brightness;
}
idata.data = data;
// Draw the pixels onto the visible canvas
c.putImageData(idata,0,0);
// Start over!
setTimeout(draw,20,v,c,bc,w,h);
}
</script>
<video id=v controls loop>
<source src=video.webm type=video/webm>
</video>
<canvas id=c></canvas>
<style>
#c {
position: absolute;
top: 50%;
left: 50%;
margin: -180px 0 0 20px;
}
#v {
position: absolute;
top: 50%;
left: 50%;
margin: -180px 0 0 -500px;
}
</style>
The canvas work only if the video hosted in my site, but if a external video the canvas not working only work if make a proxy using the same domain, for example:
Working if a hosted the video on my site:
<video id=v controls loop>
<source src=video.webm type=video/webm>
</video>
Working if a use a proxy, but I will not use a proxy:
<video id=v controls loop>
<source src=./proxy.php?url_toexternal_video=http://host.com/video.webm type=video/webm>
</video>
Not working if a use the direct link to the video:
<video id=v controls loop>
<source src=http://host.com/video.webm type=video/webm>
</video>
any way to make it work if it is from an external video? Thanks! ;)
Nope, there's no way to use getImageData on a canvas that has been tainted by cross-origin content.
I am using an HTML5 Video on my website, with certain other codes that basically makes usability more customized.
The video is intended to play when in view and pause when not in view. Additionally it also has a play and pause button that comes into view when the mouse hovers on the video.
At the end of the video it turns into an image because by default the html5 video would just turn to blank.
The problem is that the image turns up in the end, but the play/pause continue to appear on hover and function as play pause but only audio. You cannot see the video.
I originally wanted it to just show the picture. But would prefer to have the play pause turn into a restart button if the video ends.
I tried looking for something that would fit my existing setup, but I am not sure how to make it happen and which of these codes would I play with.
Here is a link for the site
http://minhasdistillery.com/blumersmoonshine/
<section id="feature">
<div id="trail">
<div id="videocontrol">
<a id="play-pause" class="play"><img src="images/pause.png"/></a>
</div>
<video id="video_background" preload="auto" volume="5"><!--or turn on loop="loop"-->
<source src="videos/video.webm" type="video/webm">
<source src="videos/video.mp4" type="video/mp4">
<source src="videos/video.ogv" type="video/ogg ogv">
</video>
<img id="image_background" src="images/blumer.jpg" width="100%" height="100%" />
</div><!--trail-->
</section><!--feature-->
Javascript that brings up play/pause button
<script>
window.onload = function() {
var video = document.getElementById("video_background");
var playButton = document.getElementById("play-pause");
playButton.addEventListener("click", function() {
if (video.paused == true) {
video.play();
playButton.innerHTML = "<img src='images/pause.png'/>";
} else {
video.pause();
playButton.innerHTML = "<img src='images/play.png'/>";
}
});
}
</script>
The code sets the video to play on when visible and pause otherwise
<script>
//play when video is visible
var videos = document.getElementsByTagName("video"), fraction = 0.8;
function checkScroll() {
for(var i = 0; i < videos.length; i++) {
var video = videos[i];
var x = 0,
y = 0,
w = video.offsetWidth,
h = video.offsetHeight,
r, //right
b, //bottom
visibleX, visibleY, visible,
parent;
parent = video;
while (parent && parent !== document.body) {
x += parent.offsetLeft;
y += parent.offsetTop;
parent = parent.offsetParent;
}
r = x + w;
b = y + h;
visibleX = Math.max(0, Math.min(w, window.pageXOffset + window.innerWidth - x, r - window.pageXOffset));
visibleY = Math.max(0, Math.min(h, window.pageYOffset + window.innerHeight - y, b - window.pageYOffset));
visible = visibleX * visibleY / (w * h);
if (visible > fraction) {
video.play();
} else {
video.pause();
}
}
}
window.addEventListener('scroll', checkScroll, false);
window.addEventListener('resize', checkScroll, false);
//check at least once so you don't have to wait for scrolling for the video to start
window.addEventListener('load', checkScroll, false);
checkScroll();
</script>
This one adds the photo in the end.
<script>
var video = document.getElementById('video_background');
var wrapper = document.getElementById('wrapper');
var image = document.getElementById('image_background');
video.addEventListener('ended', function() {
video.style.display = 'none';
image.style.display = 'inline';
}, false);
</script>
A JSBin of the same issue is here
JSBin For Issue
as you will see at the end of the video it will continue to show pause and play and will only play audio.
How do I get it to read that the video ended and switch the button to "replay"
Initially video display style is block and image display style is none.
Video ended event handler sets video display to none and image display to inline.
You can check video display style in button click event handler and toggle it:
playButton.addEventListener(
'click',
function(event) {
if (video.style.display === 'none') {
image.style.display = 'none';
video.style.display = 'block';
}
...
},
false
);
As an alternative add boolean flag which is intially set to false, on video ended event set it to true:
var needReplay = false;
video.addEventListener(
'ended',
function() {
...
needReplay = true;
},
false
);
playButton.addEventListener(
'click',
function(event) {
if (needReplay) {
image.style.display = 'none';
video.style.display = 'block';
needReplay = false;
}
...
},
false
);
Demo