Generate thumbnails from video files using HTML5's video tag and canvas

gistfile1.php

<?php
//where you want your thumbnails to go
$thumbs_dir = 'uploads/thumbs/';

//this should be an array of video paths
$videos = array();

if( $_POST["name"] ){
    // Grab the MIME type and the data with a regex for convenience
    if (!preg_match('/data:([^;]*);base64,(.*)/', $_POST['data'], $matches)) {
        die("error");
    }
    
    // Decode the data
    $data = $matches[2];
    $data = str_replace(' ','+',$data);
    $data = base64_decode($data);
    
    file_put_contents($thumbs_dir.$file, $data);
    
    print 'done '.$name;
    exit;
}
?>

<video id="video" src=""  onerror="failed(event)" controls="controls" preload="none"></video>

<script>
var videos = <?=json_encode($videos);?>;
var index = 0;
var video = document.getElementById('video');

video.addEventListener('canplay', function() {
    this.currentTime = this.duration / 2;
}, false);

video.addEventListener('seeked', function() {
    getThumb();
}, false);

function nextVideo(){
    if(videos[index]){        
        video.src = '/uploads/'+videos[index];
        console.log(index);
        console.log('loading: '+video.src);
        video.load();
        index++;
    }else{
        console.log('done');
    }
}

function getThumb(){
    var filename = video.src;
    var w = video.videoWidth;//video.videoWidth * scaleFactor;
    var h = video.videoHeight;//video.videoHeight * scaleFactor;
    var canvas = document.createElement('canvas');

    canvas.width = w;
    canvas.height = h;
    var ctx = canvas.getContext('2d');
    ctx.drawImage(video, 0, 0, w, h);

    //document.body.appendChild(canvas);
    var data = canvas.toDataURL("image/jpg");
    
    //send to php script
    var xmlhttp = new XMLHttpRequest;
    
    xmlhttp.onreadystatechange = function(){
        if (xmlhttp.readyState==4 && xmlhttp.status==200){
            console.log('saved');
            nextVideo();
        }
    }
    
    console.log('saving');
    xmlhttp.open("POST", location.href, true);
    xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded");
    xmlhttp.send('name='+encodeURIComponent(filename)+'&data='+data);
}

function failed(e) {
    // video playback failed - show a message saying why
    switch (e.target.error.code) {
        case e.target.error.MEDIA_ERR_ABORTED:
            console.log('You aborted the video playback.');
        break;
        case e.target.error.MEDIA_ERR_NETWORK:
            console.log('A network error caused the video download to fail part-way.');
        break;
        case e.target.error.MEDIA_ERR_DECODE:
            console.log('The video playback was aborted due to a corruption problem or because the video used features your browser did not support.');
        break;
        case e.target.error.MEDIA_ERR_SRC_NOT_SUPPORTED:
            console.log('The video could not be loaded, either because the server or network failed or because the format is not supported.');
        break;
        default:
            console.log('An unknown error occurred.');
        break;
    }
    
    nextVideo();
}
 
//let's go
nextVideo();
</script>

Very good! Thanks!

Has someone managed to get a working example of this? Trying to implement it but not been successful so far

Not working undefine index name could you please explain more how exactly it working please

Disable PHP notices/ warnings.

error_reporting(0);
error_reporting(E_ALL ^ E_WARNING);
error_reporting(E_ALL & ~E_WARNING & ~E_NOTICE);
after adding this warrning goes but still images not saved

`<?php
//where you want your thumbnails to go
$thumbs_dir = 'uploads/thumbs/';
error_reporting(0);
error_reporting(E_ALL ^ E_WARNING);
error_reporting(E_ALL & ~E_WARNING & ~E_NOTICE);
//this should be an array of video paths
$videos = array("animation.mp4");

if( $_POST["name"] ){
// Grab the MIME type and the data with a regex for convenience
if (!preg_match('/data:([^;]);base64,(.)/', $_POST['data'], $matches)) {
die("error");
}

// Decode the data
$data = $matches[2];
$data = str_replace(' ','+',$data);
$data = base64_decode($data);

file_put_contents($thumbs_dir.$file, $data);

print 'done '.$name;
exit;

}
?>

<script> var videos = ; var index = 0; var video = document.getElementById('video'); video.addEventListener('canplay', function() { this.currentTime = this.duration / 2; }, false); video.addEventListener('seeked', function() { getThumb(); }, false); function nextVideo(){ if(videos[index]){ video.src = '/uploads/'+videos[index]; console.log(index); console.log('loading: '+video.src); video.load(); index++; }else{ console.log('done'); } } function getThumb(){ var filename = video.src; var w = video.videoWidth;//video.videoWidth * scaleFactor; var h = video.videoHeight;//video.videoHeight * scaleFactor; var canvas = document.createElement('canvas'); canvas.width = w; canvas.height = h; var ctx = canvas.getContext('2d'); ctx.drawImage(video, 0, 0, w, h); //document.body.appendChild(canvas); var data = canvas.toDataURL("image/jpg"); //send to php script var xmlhttp = new XMLHttpRequest; xmlhttp.onreadystatechange = function(){ if (xmlhttp.readyState==4 && xmlhttp.status==200){ console.log('saved'); nextVideo(); } } console.log('saving'); xmlhttp.open("POST", location.href, true); xmlhttp.setRequestHeader("Content-type","application/x-www-form-urlencoded"); xmlhttp.send('name='+encodeURIComponent(filename)+'&data='+data); } function failed(e) { // video playback failed - show a message saying why switch (e.target.error.code) { case e.target.error.MEDIA_ERR_ABORTED: console.log('You aborted the video playback.'); break; case e.target.error.MEDIA_ERR_NETWORK: console.log('A network error caused the video download to fail part-way.'); break; case e.target.error.MEDIA_ERR_DECODE: console.log('The video playback was aborted due to a corruption problem or because the video used features your browser did not support.'); break; case e.target.error.MEDIA_ERR_SRC_NOT_SUPPORTED: console.log('The video could not be loaded, either because the server or network failed or because the format is not supported.'); break; default: console.log('An unknown error occurred.'); break; } nextVideo(); } //let's go nextVideo(); </script>`

any idea please i am really stuck my server dont allow to install fmmpg extension i need solutions kindly guide me please