问题
我正在使用此网站上的javascript。
https://developers.google.com/web/fundamentals/media/capturing-images/#acquire_access_to_the_camera
有关于画布的信息,我可以:
例如,如何从画布存储到本地或服务器?那时髦的效果呢? :)
并且可以在没有查看摄像机video tag
窗口的情况下将摄像机的输入存储到文件吗?
感谢。
系统
Linux local 5.0.0-29-lowlatency #31-Ubuntu SMP PREEMPT Thu Sep 12 14:13:01 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux
您可以使用canvas.toDataURL("img/png")
将图像src保存为base64:
captureButton.addEventListener('click', () => {
// Draw the video frame to the canvas.
context.drawImage(player, 0, 0, canvas.width, canvas.height);
// Get the image src (base64)
const imgSrc=canvas.toDataURL("img/png");
// Apply the src to an image element
const img = new Image();
img.src = imgSrc
// Add the newly created image to the DOM
// A html element with the class .image-holder needs to exist on the page
document.querySelector('.image-holder').appendChild(img);
// Store the src in local storage
localStorage.setItem('imgSrc', imgSrc)
});
要将其保存到本地计算机,您可以使用类似FileSaver的命令(感谢this这样的答案:]
captureButton.addEventListener('click', () => {
// Draw the video frame to the canvas.
context.drawImage(player, 0, 0, canvas.width, canvas.height);
// save the file
canvas.toBlob(function(blob) {
saveAs(blob, "image-name.jpg");
});
});