Javascript Dropzone js无法从服务器加载视频缩略图
从服务器加载上传的视频时,我遇到dropzone js问题 dropzone加载图片缩略图,但未加载视频缩略图 从这里检查一下 我想从ajax请求加载视频。这是我的代码:Javascript Dropzone js无法从服务器加载视频缩略图,javascript,jquery,dropzone,Javascript,Jquery,Dropzone,从服务器加载上传的视频时,我遇到dropzone js问题 dropzone加载图片缩略图,但未加载视频缩略图 从这里检查一下 我想从ajax请求加载视频。这是我的代码: this.on("error", function(file, response) { $(file.previewElement).find('.dz-error-message').tooltip().attr('data-original-title',response); }); $.ajax(
this.on("error", function(file, response) {
$(file.previewElement).find('.dz-error-message').tooltip().attr('data-original-title',response);
});
$.ajax({
url: 'https://localhost/asnaf2019/userpanel/uploader.php',
type: 'post',
data: {request: 2},
dataType: 'json',
success: function(response){
$.each(response, function(key,value) {
var mockFile = { name: value.name };
myDropzone_video.emit("addedfile", mockFile);
myDropzone_video.emit("thumbnail", mockFile, value.path);
myDropzone_video.emit("complete", mockFile);
});
}
});
this.on('addedfile', function(origFile) {
var fileReader = new FileReader();
fileReader.addEventListener("load", function(event) {
var origFileIndex = myDropzone_video.files.indexOf(origFile);
myDropzone_video.files[origFileIndex].status = Dropzone.ADDED;
var blob = new Blob([fileReader.result], {type: origFile.type});
var url = URL.createObjectURL(blob);
var video = document.createElement('video');
var timeupdate = function() {
if (snapImage()) {
video.removeEventListener('timeupdate', timeupdate);
video.pause();
}
};
video.addEventListener('loadeddata', function() {
if (snapImage()) {
video.removeEventListener('timeupdate', timeupdate);
}
});
if (!origFile.type.match(/mp4|MP4/)) {
myDropzone_video.enqueueFile(origFile);
myDropzone_video.removeFile(origFile);
return;
}
var snapImage = function() {
var canvas = document.createElement('canvas');
canvas.width = video.videoWidth;
canvas.height = video.videoHeight;
canvas.getContext('2d').drawImage(video, 0, 0, canvas.width, canvas.height);
var arrText = new Array();
var image = canvas.toDataURL();
var success = image.length > 100000;
if (success) {
var img = document.getElementsByClassName('img-preview');
var l = img.length;
$.each(img,function(){
arrText.push(image);
});
for(var i=0; i < l; i++){
var t = img[i];
myDropzone_video.emit("thumbnail", origFile, arrText[i]);
}
URL.revokeObjectURL(url);
}
return success;
};
video.addEventListener('timeupdate', timeupdate);
video.preload = 'metadata';
video.src = url;
video.muted = true;
video.playsInline = true;
video.play();
});
fileReader.readAsArrayBuffer(origFile);
});
this.on(“错误”,函数(文件,响应){
$(file.previewElement).find('.dz错误消息').tooltip().attr('data-original-title',response);
});
$.ajax({
网址:'https://localhost/asnaf2019/userpanel/uploader.php',
键入:“post”,
数据:{请求:2},
数据类型:“json”,
成功:功能(响应){
$。每个(响应、功能(键、值){
var mockFile={name:value.name};
myDropzone_video.emit(“addedfile”,mockFile);
myDropzone_video.emit(“缩略图”、mockFile、value.path);
myDropzone_video.emit(“完成”,mockFile);
});
}
});
this.on('addedfile',函数(origFile){
var fileReader=newfilereader();
fileReader.addEventListener(“加载”,函数(事件){
var origFileIndex=myDropzone_video.files.indexOf(origFile);
myDropzone_video.files[origFileIndex]。状态=Dropzone.ADDED;
var blob=new blob([fileReader.result],{type:origFile.type});
var url=url.createObjectURL(blob);
var video=document.createElement('video');
var timeupdate=函数(){
if(snapImage()){
video.removeEventListener('timeupdate',timeupdate);
video.pause();
}
};
video.addEventListener('loadeddata',function(){
if(snapImage()){
video.removeEventListener('timeupdate',timeupdate);
}
});
如果(!origFile.type.match(/mp4 | mp4/)){
myDropzone_video.enqueueFile(origFile);
myDropzone_video.removeFile(origFile);
返回;
}
var snapImage=函数(){
var canvas=document.createElement('canvas');
canvas.width=video.videoWidth;
canvas.height=video.videoHeight;
canvas.getContext('2d').drawImage(视频,0,0,canvas.width,canvas.height);
var arrText=新数组();
var image=canvas.toDataURL();
var success=image.length>100000;
如果(成功){
var img=document.getElementsByClassName('img-preview');
var l=img.长度;
$.each(img,function(){
arrText.push(图像);
});
对于(变量i=0;i
运行代码时显示此错误:
TypeError:FileReader.readAsArrayBuffer的参数1不存在
实现接口Blob
如何解决这个问题我用这种方法解决这个问题
$.each(response, function(key,value) {
var mockFile = { name: value.name};
if (value.type.match(/mp4|MP4/)){ // Preview video only from type mp4
myDropzone_video.options.addedfile.call(myDropzone_video, mockFile);
var src = value.path;
var video = document.createElement('video');
video.src = src;
video.addEventListener('loadeddata', function() {
var canvas = document.createElement('canvas');
canvas.width = video.videoWidth;
canvas.height = video.videoHeight;
canvas.getContext('2d').drawImage(video, 0, 0, canvas.width, canvas.height);
var dataURI = canvas.toDataURL('image/png');
myDropzone_video.emit("thumbnail", mockFile, dataURI);
});
myDropzone_video.emit("complete", mockFile);
}
});
我就这样解决了这个问题