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>

Looks really nice.
But I can't really get it to work. First I tried to upload a file via POST but that seems wrong.

I can't manage to find out how to start. Is there a basic HOW TO for newbies?

There are a few things wrong with the above code. Not sure how the poster was able to even run this. But you need to get a better name for the file you will be saving. Line:54. As this grabs the entire url for the video and then sends that off as the file name. I would suggest stripping the last 4 lines of the videos[index-1] at the same place. And then adding '.jpg' at the end of the filename. Passing that in a post will work. Then change the $file on line 19 to be the variable in the $_POST['name']. You will also need to fill the array with the files you want to create thumbnails for. By doing

$videos = array('path/file.mp4',path/2file.mp4','/path/to/file/3.mp4');

is there any way to get screenshot from video url?

Message: Undefined index: name

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