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Add thumbnails for videos

This commit is contained in:
yflory 2017-10-24 12:26:04 +02:00
parent 21f8ae7570
commit 30a69fae13
3 changed files with 32 additions and 10 deletions
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2
www/common/common-file.js
View File

@ -296,7 +296,7 @@ define([
if (!Thumb.isSupportedType(file.type)) { return finish(); }
// make a resized thumbnail from the image..
Thumb.fromImageBlob(file, function (e, thumb_blob) {
Thumb.fromBlob(file, function (e, thumb_blob) {
if (e) { console.error(e); }
if (!thumb_blob) { return finish(); }

38
www/common/common-thumbnail.js
View File

@ -10,11 +10,14 @@ define([
'image/png',
'image/jpeg',
'image/jpg',
'image/gif', // TODO confirm this is true
'image/gif',
'video/'
];
Thumb.isSupportedType = function (type) {
return supportedTypes.indexOf(type) !== -1;
return supportedTypes.some(function (t) {
return type.indexOf(t) !== -1;
});
};
// create thumbnail image from metadata
@ -38,9 +41,9 @@ define([
}
};
var getResizedDimensions = function (img) {
var h = img.height;
var w = img.width;
var getResizedDimensions = function (img, type) {
var h = type === 'video' ? img.videoHeight : img.height;
var w = type === 'video' ? img.videoWidth : img.width;
var dim = Thumb.dimension;
// if the image is too small, don't bother making a thumbnail
@ -73,9 +76,8 @@ define([
// assumes that your canvas is square
// nodeback returning blob
Thumb.fromCanvas = Thumb.fromImage = function (canvas, cb) {
Thumb.fromCanvas = Thumb.fromImage = function (canvas, D, cb) {
var c2 = document.createElement('canvas');
var D = getResizedDimensions(canvas);
if (!D) { return void cb('TOO_SMALL'); }
c2.width = Thumb.dimension;
@ -93,7 +95,8 @@ define([
var img = new Image();
img.onload = function () {
Thumb.fromImage(img, function (err, t) {
var D = getResizedDimensions(img, 'image');
Thumb.fromImage(img, D, function (err, t) {
if (err === 'TOO_SMALL') { return void cb(void 0, blob); }
cb(err, t);
});
@ -103,6 +106,25 @@ define([
};
img.src = url;
};
Thumb.fromVideoBlob = function (blob, cb) {
var url = URL.createObjectURL(blob);
var video = document.createElement("VIDEO");
video.src = url;
video.addEventListener('loadedmetadata', function() {
video.currentTime = Number(Math.floor(Math.min(video.duration/10, 5)));
video.addEventListener('loadeddata', function() {
var D = getResizedDimensions(video, 'video');
Thumb.fromCanvas(video, D, cb);
});
});
};
Thumb.fromBlob = function (blob, cb) {
if (blob.type.indexOf('video/') !== -1) {
return void Thumb.fromVideoBlob(blob, cb);
}
Thumb.fromImageBlob(blob, cb);
};
Thumb.fromVideo = function (video, cb) {
cb = cb; // WIP

2
www/common/sframe-common-file.js
View File

@ -247,7 +247,7 @@ define([
if (!Thumb.isSupportedType(file.type)) { return finish(); }
// make a resized thumbnail from the image..
Thumb.fromImageBlob(file, function (e, thumb_blob) {
Thumb.fromBlob(file, function (e, thumb_blob) {
if (e) { console.error(e); }
if (!thumb_blob) { return finish(); }