// ==UserScript==
// @name         HTML5 Video Frame Screenshot
// @namespace    https://greasyfork.org/en/users/85671-jcunews
// @version      1.0.5
// @license      GNU AGPLv3
// @description  Adds ability to take a screenshot from the current frame of a HTML5 video element and be saved to a file named "video_frame.jpg" or "video_frame.png" (image format is configurable). This script is intended to be used as a bookmarklet using this URL: javascript:hvfs_ujs()
// @author       jcunews
// @match        *://*/*
// @grant        none
// ==/UserScript==
(function() {
//=== CONFIGURATION BEGIN ===
var imageFormat = "jpeg"; //can be one of these: jpeg, png
//=== CONFIGURATION END ===
window.hvfs_ujs = function(ele, cv) {
if (ele = document.querySelector("video")) {
cv = document.createElement("CANVAS");
if (cv.width = ele.videoWidth) {
cv.height = ele.videoHeight;
cv.getContext("2d").drawImage(ele, 0, 0);
ele = document.createElement("A");
ele.href = cv.toDataURL("image/" + imageFormat);
ele.download = "video_frame." + (imageFormat === "jpeg" ? "jpg" : imageFormat);
ele.style.visibility = "hidden";
document.body.appendChild(ele).click();
ele.remove();
return;
} else {
alert("The HTML5 video media has not been loaded yet.");
}
} else {
alert("There is no HTML5 video on this page.");
}
};
})();